Copper-catalyzed cross-coupling reactions of 5-stibano-1,2,3-triazoles with bromoalkynes under aerobic conditions: Synthesis of 5-alkynyl-1,2,3-triazoles
Publication date: Available online 9 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Mizuki Yamada, Daiki Matsuura, Mai Hasegawa, Yuki Murata, Naoki Kakusawa, Mio Matsumura, Shuji YasuikeAbstractCu-catalyzed cross-coupling of 5-stibano-1,2,3-triazoles with bromoalkynes is described. The reaction of 5-stibanotriazoles with bromoalkynes under aerobic conditions in DMF, using a combination of 10 mol% of Cu2O and 1,10-phenanthroline, produced a variety of 5-alkynyltriazoles in moderate-to-excellent yields. This reaction is the first example of Cu-catalyzed C(Ar)–C(sp) bond formation using trivalent organ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of amino glucose‐functionalized silica‐coated NiFe2O4 nanoparticles: A heterogeneous, new and magnetically separable catalyst for the solvent‐free synthesis of 2,4,5–trisubstituted imidazoles, benzo[d]imidazoles, benzo[d] oxazoles and azo-linked benzo[d]oxazoles
Publication date: Available online 9 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Leila Zare Fekri, Mohammad Nikpassand, Shahab Shariati, Behnaz Aghazadeh, Reza Zarkeshvari, Nahid Norouz pourAbstractAmino glucose‐functionalized silica‐coated NiFe2O4 nanoparticles (NiFe2O4@SiO2@amino glucose) were chemically synthesized and characterized by transmission electron microscope (TEM), X‐ray diffraction (XRD), thermal gravimetric analysis (TGA), energy dispersive X-ray analysis (EDX), vibrating sample magnetometer (VSM), Zetasizer and Fourier transform infrared spectroscopy (FT-IR) instruments. NiFe2O4@SiO...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Deep blue phosphorescent iridium(III) cyclometalates with o-carboranes
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Minji Kim, Min Hyung LeeAbstractHeteroleptic iridium(III) cyclometalates, [5-(2-MeCB)dfppy]2Ir(LX) (2-MeCB = 2-methyl-o-carboran-1-yl; dfppy = 2-(4,6-difluorophenyl)pyridinato-C2,N; LX = picolinate (5a) or tetrakis(1-pyrazolyl)borate (5b)), with o-carborane at the 5-position of the phenyl ring of the dfppy ligand were prepared to investigate the impact of the o-carborane cage on the blue phosphorescence of complexes. X-ray diffraction analysis of 5a revealed a distorted octahedral coordination geometry around the...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of a series of polymer-immobilized clusters of osmium
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Wenting Liang, Dan Li, Pui-Ling Lau, Linli Xu, Cheng Yang, Mingdeng Wei, Wesley Ting-Kwok Chan, Wai-Yeung WongAbstractTreatment of [Os3(CO)10(NCMe)2] with an equimolar amount of 4-vinylpyridine, 4-ethynylpyridine and 4-ethylpyridine at room temperature readily gave the cluster complexes [Os3(μ-H)(CO)10(μ-NC5H3CH = CH2)] 1, [Os3(μ-H)(CO)10(μ-NC5H3C≡CH)] 2 and [Os3(CO)10(μ-H)(μ-NC5H3CH2CH3)] 3, respectively. The corresponding ruthenium analogue of 1, [Ru3(μ-H)(CO)10(μ-NC5H3CH = CH2)] 4, wa...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Unprecedented formation of a μ-oxobridged polymeric copper(II) complex: Evaluation of catalytic activity in synthesis of 5-substituted 1H-tetrazoles
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Samaresh Layek, Rakesh Ganguly, Devendra D. PathakAbstractThe reaction of CuCl2·2H2O with Schiff base ligand, 4-[(2-hydroxy-3-methoxybenzylidene)amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3-one] (hmdpH), in 1:1 molar ratio led to a novel and unprecedented oxo-bridged polymeric copper (II) complex, [Cu(μ-O) (hmdp)]n. The complex was isolated as crystalline solid and characterized by FTIR, UV–visible and EPR spectroscopic techniques. The molecular structure of the complex was also determined by single crystal X-ray...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis of Rh(I) alkylated-PTA complexes as catalyst precursors in the aqueous-biphasic hydroformylation of 1-octene
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Diteboho S. Ramarou, Banothile C.E. Makhubela, Gregory S. SmithAbstractA series of mono- and multivalent phosphorus-based ligands was synthesised by the lower-rim benzylation of the water-soluble ligand, 1,3,5-triaza-7-phosphaadamantane (PTA). These ligands were used to prepare mono-, bi- and trinuclear Rh(I) complexes whose catalytic activity, product selectivity and recyclability were evaluated in the aqueous biphasic hydroformylation of 1-octene.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Transition metal-free regioselective cross-coupling of azine N-oxides with cymantrenyl lithium
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Alexandra A. Musikhina, Irina A. Utepova, Oleg N. Chupakhin, Valery N. Charushin, Pavel A. SlepukhinAbstractThe facile CC coupling reaction of activated forms of azaaromatics (azine-N-oxides) with cymantrenyl lithium, as a nucleophile, has first been carried out. It has been established that aromatization of intermediate adducts can be realized through either oxidative or eliminative pathways, depending on the structure of the starting azine N-oxide. In particular, the dihydroazinyl intermediates, bearing the additional N(4)...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Bisferrocene-containing ionic liquid supported on silica coated Fe3O4: A novel nanomagnetic catalyst for the synthesis of dihydropyrano[2,3-c]coumarin derivatives
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Reza Teimuri-Mofrad, Somayeh Esmati, Shabnam Tahmasebi, Mahdi Gholamhosseini-NazariAbstractNanomagnetic bisferrocene-containing ionic liquid supported on silica coated Fe3O4 (Fe3O4@SiO2@imidazol-bisFc[HCO3]) as a novel heterogeneous catalyst was synthesized and the structure and morphology of nanomagnetic catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microsco...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and catalytic activities of rhenium carbonyl complexes bearing pyridine-alkoxide ligands
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Zhiqiang Hao, Ning Li, Xinlong Yan, Xiaohui Yue, Kang Liu, Huating Liu, Zhangang Han, Jin LinAbstractThermal treatment of Re2(CO)10 with pyridine-alkoxide ligands PyC(CH2)4OH (LaH) and PyCR1R2OH (R1 = CH3, R2 = C6H5 (LbH); R1 = H, R2 = C6H5 (LcH); R1 = H, R2 = 4-CH3C6H4 (LdH); R1 = H, R2 = 4-OMeC6H4 (LeH); R1 = H, R2 = 4-ClC6H4 (LfH); R1 = H, R2 = 4-CF3C6H4 (LgH)) respectively in refluxing xylene generated a series of dirhenium carbonyl complexes [PyC(CH2)4O]2 [Re(CO)3]2 (1a) a...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Supported 4-carboxybenzyl sulfamic acid on magnetic nanoparticles as a recoverable and recyclable catalyst for synthesis of 3,4,5-trisubstituted furan-2(5H)-one derivatives
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Mohammad Mehdi Khodaei, Abdolhamid Alizadeh, Maryam HaghipourAbstract4-Carboxybenzyl sulfamic acid functionalized Fe3O4 nanoparticles as a novel catalyst was manufactured. This catalyst was characterized and evaluated in the one-pot synthesis of furan-2(5H)-one derivatives from dimethyl acetylenedicarboxylate, aryl aldehydes, and various anilines in terms of activity and reusability. The catalyst showed high catalytic activity, good recoverability and reusability, thermal stability and provides clean production of fine furan...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Palladium-catalyzed, ligand-free SN2’ substitution reactions of organoaluminum with propargyl acetates for the synthesis of multi-substituted allenes
We describe a convenient method for the synthesis of multi-substituted allenes from SN2′ substitution reactions organoaluminum with propargyl acetates: The SN2′ substitution reaction of organoaluminum (0.4 mmol) with propargyl acetates (0.5 mmol) mediated by PdCl2(dppf) (1 mol%) at 60 °C in THF without ligand could produce multi-substituted allenes in moderate to good yields (up to 98%) and high selectivities (up to 99%). Their structures have been determined by HRMS and 1H (13C)NMR data.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Half-sandwich Ruthenium(II) arene complexes bearing the azo-azomethine ligands: Electrochemical, computational, antiproliferative and antioxidant properties
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Ayşe İnan, Ali Burak Sünbül, Mesut İkiz, Seçil Erden Tayhan, Sema Bilgin, Mahfuz Elmastaş, Koray Sayın, Gökhan Ceyhan, Muhammet Köse, Esin İspirAbstractThree novel azo-azomethine ligands have been synthesized in an accomplished one-pot synthesis protocol. The mononuclear Ru(II) complexes of these azo-azomethine dyes were prepared and characterized by the combination of elemental analyses, IR, UV–Visible spectroscopy and 1H13C NMR spectra. Solid state structures of 3, 4 and 7 were determ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Electrophilicity of aliphatic nitrilium closo-decaborate clusters: Hyperconjugation provides an unexpected inverse reactivity order
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Valeria K. Burianova, Alexander S. Mikherdov, Dmitrii S. Bolotin, Alexander S. Novikov, Pennie Petrus Mokolokolo, Andreas Roodt, Vadim P. Boyarskiy, Vitalii V. Suslonov, Andrey P. Zhdanov, Konstantin Yu Zhizhin, Nikolay T. KuznetsovAbstractThe nucleophilic addition of 2-pyridyl carbamidoxime to the C≡N group of the aliphatic nitrilium closo-decaborate clusters (PhCH2PPh3)[B10H9NCR] (R = Me, Et, and iPr) proceeds to give 2-iminium closo-decaborates (68–88% isolated yields). A systematic kinetic and theoretical...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Ladder–like diferrocenyloxytetraalkyldistannoxanes
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Peter Frenzel, Marcus Korb, Alexander Hildebrandt, Heinrich LangAbstractTitle compounds {[R2Sn(OFc)]2O}2 (3a, R = nBu; 3b, R = Me; Fc = Fe(ƞ5–C5H4) (ƞ5–C5H5)) are accessible by treatment of R2SnO (2a,b) with equimolar amounts of FcOH (1). The molecular structures of 3a,b in the solid state confirm their planar character, consisting of three, four–membered Sn2O2 rings with penta–coordinated Sn, tri–coordinated O atoms and the alkyl groups protruding above and below the Sn4O6 motif. ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis of new organoelement copolymers based on polydimethylsiloxanes and aminophosphonates
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Sergey A. Milenin, Rushana R. Khairova, Victor D. Myakushev, Alexander I. Buzin, Victor G. Vasiliev, Ivan I. Stoikov, Aziz M. MuzafarovAbstractBased on commercially available 3-Aminopropyl (diethoxy)methylsilane new alkoxysilane with functional aminophosphonate group - diethyl (2-((3-(diethoxy (methyl)silyl)propyl)amino)propan-2-yl)phosphonate were synthesized and characterized. Obtained functional alkoxysilane were transformed to tetrasiloxane in active medium in the presence of acetic acid and then copolymerized with octam...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Zirconocene-catalysed biodiesel synthesis from vegetable oil with high free fatty acid contents
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Yiqiang Deng, Xiaojian Hu, Lihua Cheng, Hanlu Wang, Linhai Duan, Renhua QiuAbstractA highly efficient transformation of vegetable oils into biodiesel catalysed by air-stable and water-tolerant zirconocene perfluorooctanesulfonate Lewis acid has been developed. By combining the direct esterification of free fatty acids (FFAs) and transesterification of triglycerides (TGs), the simultaneous transformation of the two components to biodiesel is achieved in good yields. Furthermore, this catalyst, when used in the synthesis of bi...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Amino acid ferrocene conjugates using sulfonamide linkages
This report presents the synthesis and characterization of mono- and bis(amino acid ester) ferrocene complexes generated using a sulfonamide linking strategy as an alternative to the more heavily explored amide linking strategy. These compounds were investigated to test their ability to form hydrogen bonding interactions both in the solid state and in solution, and were compared to the previously observed intramolecular interstrand crosslinking seen in amide-linked ferrocene constructs. Synthesized compounds also included controls that do not exhibit sulfonamide N-H bonds and thus cannot engage in hydrogen bonding. In the ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

(C4Me4)Co-containing triple-decker complexes with bridging heterocyclic ligands
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Dmitry A. Loginov, Yulia V. Nelyubina, Alexander R. KudinovAbstract(C4Me4)Co-containing triple-decker complexes with bridging boron and phosphorus heterocyclic ligands [(C4Me4)Co(μ-η:η-L)MCp*]+ (1: M = Fe, L = C5H5BMe; 2: M = Fe, L = C4Me4P; 3a: M = Fe, L = cyclo-P5; 3b: M = Ru, L = cyclo-P5) were synthesized by photochemical reaction of [(C4Me4)Co(C6H6)]+ with sandwich compounds Cp*ML. They were isolated as salts with PF6− anion, and the structures of 1PF6, 2PF6, and 3aPF6 we...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

New salan and salen vanadium complexes: Syntheses and application in sulfoxidation catalysis
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Minaxi S. Maru, Sónia Barroso, Pedro Adão, Luis G. Alves, Ana M. MartinsAbstractNew diamine bis-phenol compounds of salan- (HOPh’CHNH(CH2)2NHCHPh’OH, Ph’ = 2,4-(CMe2Ph)C6H2, H2L1) and salen-type (HOPh’’CHN(CHPh)2NCHPh’’OH, Ph’’ = 2,4-tBuC6H2, H2L2 and HOPh’’CHN(1,1′-2-binaphthyl)NCHPh’’OH, Ph’’ = 2,4-tBuC6H2, H2L3), as well as their oxido vanadium derivatives are described. VO(OiPr)3 was used as starting ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Diiron ethanedithiolate complexes with acetate ester: Synthesis, characterization and electrochemical properties
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Meng Lian, Jiao He, Xiao-Yong Yu, Chao Mu, Xu-Feng Liu, Yu-Long Li, Zhong-Qing JiangAbstractFive diiron ethanedithiolate complexes bearing acetate ester have been prepared and characterized. Esterification of complex [{μ-SCH2CH(CH2OH)S}Fe2(CO)6] (1) with acetic acid in the presence of N,N′-dicyclohexylcarbodiimide and 4-dimethylaminopyridine gave the acetate ester [{μ-SCH2CH(CH2O2CCH3)S}Fe2(CO)6] (2) in 94% yield. Further treatment of complex 2 with a monophosphine ligand triphenylphosphine, tricyclohexylphosphin...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Syntheses and evaluations of the methoxy modified 99mTc-labeled triphenyl phosphonium cations: Potential radiometallic probes for multidrug resistance detection
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Xiaoyan Li, Shuting Chen, Zelan Liu, Zuoquan Zhao, Jie LuAbstractIn order to develop novel radio-metal labeled probes for tumor multidrug resistance (MDR) detection, two [(C5H4-R)99mTc(CO)3]-triphenylphosphonium (TPP) cations with methoxy groups, 99mTc-6 and 99mTc-7 were prepared from the ferrocenyl precursors and purified by Radio-HPLC. Corresponding Re compounds were also synthesized and characterized as structure-referenced congeners of 99mTc-labeled complexes. The 99mTc-labeled complexes were lipophilic and stable both ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of planar chiral cyclopalladated ferrocenylimines: DNA/HSA interactions and in vitro cytotoxic activity
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Yangyang Zhou, Ting Song, Yuan Cao, Guidong Gong, Yanjin Zhang, Haihang Zhao, Gang ZhaoAbstractA series of planar chiral cyclopalladated ferrocene compounds were synthesized and characterized. The absolute configurations of three compounds were determined by single-crystal X-ray analysis. The binding of the compounds with Native Calf Thymus DNA (CT-DNA) was monitored using UV-visible absorption spectrophotometry, fluorescence spectroscopy and circular dichroism (CD) studies. The results indicate that these compounds can int...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Nitro-imidazoles in ferrocenyl alkylation reaction. Synthesis, enantiomeric resolution and in vitro and in vivo bioeffects
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Lubov V. Snegur, Maria V. Lyapunova, Daria D. Verina, Vadim V. Kachala, Alexander A. Korlyukov, Mikhail M. Ilyin, Vadim A. Davankov, Larissa A. Ostrovskaya, Natalia V. Bluchterova, Margarita M. Fomina, Victor S. Malkov, Kseniya V. Nevskaya, Alexandra G. Pershina, Alexander A. SimenelAbstractFerrocenylalkyl nitro-imidazoles (4a-h, 5a-h) were prepared via the regiospecific reaction of the α-(hydroxy)alkyl ferrocenes, FcCHR (OH) (1a–h; Fc = ferrocenyl; R = H, Me, Et, Pr, i-Pr, Ph, ortho-Cl-Ph, ortho-I-Ph), ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and antibacterial studies of schiff based 1,2,3-triazole bridged silatranes
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Gurjaspreet Singh, Jasbhinder Singh, Akshpreet Singh, Jandeep Singh, Manoj Kumar, Kshitiz Gupta, Sanjay ChhibberAbstractA single step Cu (I) assisted click silylation reaction had been used for the synthesis of novel Schiff based 1,2,3-triazole bridged silatrane (SBTBS)-scaffolds (5a-5f) using polyfunctionalised Schiff based 1,2,3-triazole bridged organotriethoxysilanes (SBTBOTS) (4a-4f) as precursors. These compounds were synthesized in excellent yields using an economical, simple and biocompatible synthetic procedure and ...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Organosilicon based synthesis of new functionalized aminomethylenediphosphonates with moieties of amino acids
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Andrey A. Prishchenko, Roman S. Alekseyev, Mikhail V. Livantsov, Olga P. Novikova, Ludmila I. Livantsova, Valery S. PetrosyanAbstractThe new functionalized aminomethylenediphosphonates with moieties of various amino acids are synthesized via unique reaction of tris(trimethylsilyl) phosphite and N-formyl amino acids at the presence of effective catalyst – trimethylsilyl triflate under mild conditions. The further treatment of aminomethylenediphosphonates with the methanol excess resulted in the water-soluble functional...
Source: Journal of Organometallic Chemistry - July 11, 2018 Category: Chemistry Source Type: research

Copper-catalyzed cross-coupling reactions of 5-stibano-1,2,3-triazoles with bromoalkynes under aerobic conditions: Synthesis of 5-alkynyl-1,2,3-triazoles
Publication date: Available online 9 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Mizuki Yamada, Daiki Matsuura, Mai Hasegawa, Yuki Murata, Naoki Kakusawa, Mio Matsumura, Shuji YasuikeAbstractCu-catalyzed cross-coupling of 5-stibano-1,2,3-triazoles with bromoalkynes is described. The reaction of 5-stibanotriazoles with bromoalkynes under aerobic conditions in DMF, using a combination of 10 mol% of Cu2O and 1,10-phenanthroline, produced a variety of 5-alkynyltriazoles in moderate-to-excellent yields. This reaction is the first example of Cu-catalyzed C(Ar)–C(sp) bond formation using trivalent organ...
Source: Journal of Organometallic Chemistry - July 9, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of amino glucose‐functionalized silica‐coated NiFe2O4 nanoparticles: A heterogeneous, new and magnetically separable catalyst for the solvent‐free synthesis of 2,4,5–trisubstituted imidazoles, benzo[d]imidazoles, benzo[d] oxazoles and azo-linked benzo[d]oxazoles
Publication date: Available online 9 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Leila Zare Fekri, Mohammad Nikpassand, Shahab Shariati, Behnaz Aghazadeh, Reza Zarkeshvari, Nahid Norouz pourAbstractAmino glucose‐functionalized silica‐coated NiFe2O4 nanoparticles (NiFe2O4@SiO2@amino glucose) were chemically synthesized and characterized by transmission electron microscope (TEM), X‐ray diffraction (XRD), thermal gravimetric analysis (TGA), energy dispersive X-ray analysis (EDX), vibrating sample magnetometer (VSM), Zetasizer and Fourier transform infrared spectroscopy (FT-IR) instruments. NiFe2O4@SiO...
Source: Journal of Organometallic Chemistry - July 9, 2018 Category: Chemistry Source Type: research

Synthesis of mono- and tetra-nuclear β-pyridylenolate zinc complexes and their catalysis toward the ring-opening copolymerization of ε-caprolactone and lactide
Publication date: Available online 7 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Lu Qin, Jianliang Bai, Yue Zhang, Xia ChenAbstractThe synthesis of mono-nuclear β-pyridylenolate zinc complexes L12Zn (1) (L1 = (2-C5H4N)–CH=C(CH3)–O–) and L22Zn (2) (L2 = (2-C5H4N)–CH=C (2-CH3C6H5)–O–) were performed by the protonolysis of the corresponding β-pyridylenol bidentate ligands 1-(2-pyridinyl)-2-propanone (L1H) and 1-(2-methylphenyl)-2-(2-pyridinyl)-ethanone (L2H) with diethylzinc in a 2:1 M ratio, respectively. The unanticipated tetra-nuclear β-pyridylenolate ...
Source: Journal of Organometallic Chemistry - July 8, 2018 Category: Chemistry Source Type: research

Diphosphine-induced thiolate-bridge scission of [Re(CO)3(μ,κ2-S,N-thpymS)]2 (thpymS = 1,4,5,6-tetrahydropyrimidine-2-thiolate): Structural and computational studies of configurational isomers of [Re(CO)3(κ2-S,N-thpymS)]2(μ,κ1,κ1-dppe)
Publication date: Available online 7 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Md Rassel Moni, Shishir Ghosh, Shaikh M. Mobin, Derek A. Tocher, Graeme Hogarth, Michael G. Richmond, Shariff E. KabirAbstractReactions of binuclear [Re(CO)3(μ,κ2-S,N-thpymS)]2 (1) with diphosphines have been investigated. At 298 K, dppm reacts to give mononuclear [Re(CO)3 (κ1-dppm) (κ2-S,N-thpymS)] (2) through a phosphine-promoted scission of the dithiolate bridges that leaves one of the phosphine moieties free (dangling). Refluxing 2 in toluene leads to CO loss and formation of dinuclear [Re2(CO)4 (&...
Source: Journal of Organometallic Chemistry - July 8, 2018 Category: Chemistry Source Type: research

Organosilicon based synthesis of new functionalized aminomethylenediphosphonates with moieties of amino acids
Publication date: Available online 7 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Andrey A. Prishchenko, Roman S. Alekseyev, Mikhail V. Livantsov, Olga P. Novikova, Ludmila I. Livantsova, Valery S. PetrosyanAbstractThe new functionalized aminomethylenediphosphonates with moieties of various amino acids are synthesized via unique reaction of tris(trimethylsilyl) phosphite and N-formyl amino acids at the presence of effective catalyst – trimethylsilyl triflate under mild conditions. The further treatment of aminomethylenediphosphonates with the methanol excess resulted in the water-soluble functionali...
Source: Journal of Organometallic Chemistry - July 8, 2018 Category: Chemistry Source Type: research

Mixed μ-azido-Schiff-base cyclometallated Pd (II) complexes as a template for novel palladacycles bearing bridging carbodiimido, tetrazolato ligands, and tetrazole-thiolato linkers
Publication date: Available online 6 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Yuchun Jiang, Manna Li, Daliang Liu, Xi-Ming Song, Xiaohong ChangAbstractMixed μ-azido-Schiff-base palladacycles [Pd{C,N-κ2-(4-R)C6H3CH = N-C6H3-2,6-i-Pr2}(μ2-N3)]2 (R = H, 1; OMe, 2) served as a metal-template for the synthesis of unusual dicarbodiimido bridged complexes [(μ2-NCN-Xyl)Pd{C,N-κ2-(4-R)C6H3CH = NC6H3-2,6-i-Pr2}]2 (R = H; OMe) and mixed tetrazolato-isocyanido complexes [Pd(C,N-κ2-(4-R)C6H3CH = NC6H3-2,6-i-Pr2) (CN4-Xyl) (CN-Xyl)] (R = H; OMe). Reactions of ethyl...
Source: Journal of Organometallic Chemistry - July 7, 2018 Category: Chemistry Source Type: research

Nitro-imidazoles in ferrocenyl alkylation reaction. Synthesis, enantiomeric resolution and in vitro and in vivo bioeffects
Publication date: 15 September 2018Source: Journal of Organometallic Chemistry, Volume 871Author(s): Lubov V. Snegur, Maria V. Lyapunova, Daria D. Verina, Vadim V. Kachala, Alexander A. Korlyukov, Mikhail M. Ilyin, Vadim A. Davankov, Larissa A. Ostrovskaya, Natalia V. Bluchterova, Margarita M. Fomina, Victor S. Malkov, Kseniya V. Nevskaya, Alexandra G. Pershina, Alexander A. SimenelAbstractFerrocenylalkyl nitro-imidazoles (4a-h, 5a-h) were prepared via the regiospecific reaction of the α-(hydroxy)alkyl ferrocenes, FcCHR (OH) (1a–h; Fc = ferrocenyl; R = H, Me, Et, Pr, i-Pr, Ph, ortho-Cl-Ph, ortho-I-Ph), ...
Source: Journal of Organometallic Chemistry - July 7, 2018 Category: Chemistry Source Type: research

Sterically crowded dimeric diisobutylaluminum aryloxides: Synthesis, characteristics, and application as activators in homo- and copolymerization of olefins
Publication date: Available online 5 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Еvgeny Е. Faingol'd, Igor V. Zharkov, Natalia M. Bravaya, Andrey N. Panin, Stanislav L. Saratovskikh, Olga N. Babkina, Gennadii V. ShilovAbstractA row of dimeric diisobutylaluminum aryloxides bearing different sterically crowded substituents in ortho-positions of the aryl ligand [(ArO)AliBu2]2 (ArO = 2-tBu-C6H4O (AlTBP), 2-Me,6-tBu-C6H3O (AlMTBP), 2,6-iPr2-C6H3O (AlDIPP), 2-Ph-C6H4O (AlPP), 2,6-Ph2-C6H3O (AlDPP), 1-C10H7O (AlN-1) was synthesized. The Molecular structures of AlMTBP, AlDIPP, AlPP, AlDPP, and AlN-1 have b...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Propylene polymerization using TiCln(OR)(4–n) catalysts: Theoretical analysis and experimental investigation
Publication date: Available online 10 November 2017Source: Journal of Organometallic ChemistryAuthor(s): Kefeng Xie, Bochao Zhu, Anping Huang, Wenxue Zhang, Jingcheng Xu, Peng LiuAbstractPropylene polymerization mechanism was investigated with density functional theory (DFT) using TiCln(OR)(4–n) catalysts, with active centers such as [TiCl2Et]+, [TiCl(OEt)Et]+, [TiCl(OPh)Et]+, or [Ti(OEt)2Et]+. Improving the stereoselectivity of Ziegler–Natta catalyst through introducing alkoxy groups, the active center became asymmetric structure, and consequently the polymerization of propylene using [TiCl(OEt)Et]+ and [TiCl(...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Group 4 metal complexes containing the salalen ligands: Synthesis, structural characterization and studies on the ROP of cyclic esters
Publication date: Available online 23 March 2018Source: Journal of Organometallic ChemistryAuthor(s): Debashis Chakraborty, Bijja Rajashekhar, Mrinmay Mandal, Venkatachalam RamkumarAbstractThe synthesis of homoleptic salalen ligand supported group 4 complexes and their applications in the ring-opening polymerization (ROP) of ε-caprolactone (ɛ-CL) and lactide (LA) are described. All these complexes of type M(L)2 (LH = (E)-N-(2-(3,5-dibromo-2-hydroxybenzylideneamino)phenyl)-4-methylbenzenesulfonamide: M = Ti (1), M = Zr (4), M = Hf (7); LH = (E)-N-(2-(2-hydroxybenzylideneamino)phenyl)-4-methylbenzenesulf...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Ruthenium carbonyl containing 4-pyrones as potent anticancer agents
Publication date: Available online 12 April 2018Source: Journal of Organometallic ChemistryAuthor(s): V.D. Reddy, Divya Dayal, David J. Szalda, Stephen C. Cosenza, M.V. Ramana ReddyAbstractFour new triruthenium carbonyl containing 4-pyrones: Ru3(CO)8(2 L-2H) 1 (L = ethylmaltol), Ru3(CO)7(PTA) (2 L-2H) 2 (L = ethylmaltol, PTA = 1,3,5 triaza-7-phosphaadamantane), Ru3(CO)8(2 L-2H) 3 (L = allomaltol), Ru3(CO)7(PTA) (2 L-2H) 4 (L = allomaltol, PTA = 1,3,5 triaza-7-phosphaadamantane) have been synthesized and characterized. Anticancer activity of compounds 1–4 has been evaluated in vitr...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Mechanistic insights into the ligand-controlled regioselectivity in Cu-catalyzed terminal alkynes alkylboration
Publication date: Available online 19 April 2018Source: Journal of Organometallic ChemistryAuthor(s): Qi Zhang, Mo Li, Jia-Qin Liu, Hai-Zhu YuAbstractThe recent Cu-catalyzed alkylboration of unactivated terminal alkynes shows intriguing ligand-controlled regioselectivity. The anti-Markovnikov alkylboration products were obtained with dppbz as ligand, while the Markovnikov products were obtained with DMAP as ligand. In the present study, the theoretical calculation was carried out to investigate the detailed mechanism of the alkylboration process and the mechanistic origin for the ligand-regulated regioselectivity. For both...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Synthesis of the labile rhenuim(I) complexes fac-Re(CO)3(L)[κ2-O,O-FcC(O)CHC(O)Me] (where Fc = ferrocenyl; L = THF, H2O, alkyne) and alkyne addition to the diketonate ligand
Publication date: Available online 22 June 2018Source: Journal of Organometallic ChemistryAuthor(s): Silvia Atim, Li Yang, Volodymyr Nesterov, Xiaoping Wang, Michael G. RichmondAbstractRefluxing equimolar amounts of 1-ferrocenyl-1,3-butanedione (Fcacac) with BrRe(CO)5 in THF yielded the labile solvent complex fac-Re(CO)3 (THF)[κ2-O,O-FcC(O)CHC(O)Me] (1) in 80% isolated yield. 1 may also be prepared in quantitative yield using fac-BrRe(THF)2(CO)3 as the starting rhenium complex. The THF molecule in 1 is replaced by H2O during chromatographic purification to furnish the corresponding aqua complex fac-Re(CO)3(H2O)[&kapp...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and antibacterial studies of schiff based 1,2,3-triazole bridged silatranes
Publication date: Available online 25 June 2018Source: Journal of Organometallic ChemistryAuthor(s): Gurjaspreet Singh, Jasbhinder Singh, Akshpreet Singh, Jandeep Singh, Manoj Kumar, Kshitiz Gupta, Sanjay ChhibberAbstractA single step Cu (I) assisted click silylation reaction had been used for the synthesis of novel Schiff based 1,2,3-triazole bridged silatrane (SBTBS)-scaffolds (5a-5f) using polyfunctionalised Schiff based 1,2,3-triazole bridged organotriethoxysilanes (SBTBOTS) (4a-4f) as precursors. These compounds were synthesized in excellent yields using an economical, simple and biocompatible synthetic procedure and ...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of Pd-γ-Fe2O3 nanocomposite and its application as a magnetically recyclable catalyst in ligand-free Suzuki-Miyaura reaction in water
Publication date: Available online 27 June 2018Source: Journal of Organometallic ChemistryAuthor(s): Dipankar Paul, Siddheswar Rudra, Prabin Rahman, Snehadrinarayan Khatua, Mukul Pradhan, Paresh Nath ChatterjeeAbstractA novel redox-driven method to synthesize Pd-γ-Fe2O3 nanocomposite from Fe3O4 and PdCl2 under modified hydrothermal technique has been developed. The synthesized nanocomposite was characterized by XRD, FT-IR, XPS, FESEM, TEM and EDX to understand the composition as well as morphology. The Pd-γ-Fe2O3 nanocomposite was found to show excellent catalytic activity towards Suzuki-Miyaura cross-coupling ...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Nitro-imidazoles in ferrocenyl alkylation reaction. Synthesis, enantiomeric resolution and in vitro and in vivo bioeffects
Publication date: Available online 28 June 2018Source: Journal of Organometallic ChemistryAuthor(s): Lubov V. Snegur, Maria V. Lyapunova, Daria D. Verina, Vadim V. Kachala, Alexander A. Korlyukov, Mikhail M. Ilyin, Vadim A. Davankov, Larissa A. Ostrovskaya, Natalia V. Bluchterova, Margarita M. Fomina, Victor S. Malkov, Kseniya V. Nevskaya, Alexandra G. Pershina, Alexander A. SimenelAbstractFerrocenylalkyl nitro-imidazoles (4a-h, 5a-h) were prepared via the regiospecific reaction of the α-(hydroxy)alkyl ferrocenes, FcCHR (OH) (1a–h; Fc = ferrocenyl; R = H, Me, Et, Pr, i-Pr, Ph, ortho-Cl-Ph, ortho-I-Ph), ...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Synthesis of [99TcX(CO)5] (X = Cl, Br, I) at ambient pressure
Publication date: Available online 4 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Alexander E. Miroslavov, Henrik Braband, Georgii V. Sidorenko, Ekaterina S. Stepanova, Alexander A. Lumpov, Roger AlbertoAbstractA novel procedure for ambient-pressure synthesis of pentacarbonyltechnetium halides [99TcX (CO)5] (X = Cl, Br) was developed. The procedure is based on treatment of K2 [99TcX6] with a mixture of HCOOH and H2SO4 on heating. With X = I, a mixture of [99TcI(CO)5] and [99TcI(CO)4]2 was obtained. The products were characterized by elemental analysis and by 99Tc NMR and IR spectroscopy.Graphical ...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Heterogenization of homogeneous NHC-Pd-pyridine catalysts and investigation of their catalytic activities in Suzuki-Miyaura coupling reactions
Publication date: Available online 5 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Cihangir Boztepe, Asım Künkül, Sedat Yaşar, Nevin GürbüzAbstractNew generation, novel, environmentally safe polymeric heterogeneous catalysts which included catalytically active NHC-Pd-pyridine complexes were prepared by radical polymerization of NHC-Pd-pyridine complexes with Acrylamide (AAm) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) monomers in the presence of N,N′-methylenebisacrylamide (MBA) crosslinker. Structural characterization of NHC-Pd-pyridine complexes was conducted by usin...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Syntheses and evaluations of the methoxy modified 99mTc-labeled triphenyl phosphonium cations: Potential radiometallic probes for multidrug resistance detection
Publication date: Available online 5 July 2018Source: Journal of Organometallic ChemistryAuthor(s): Xiaoyan Li, Shuting Chen, Zelan Liu, Zuoquan Zhao, Jie LuAbstractIn order to develop novel radio-metal labeled probes for tumor multidrug resistance (MDR) detection, two [(C5H4-R)99mTc(CO)3]-triphenylphosphonium (TPP) cations with methoxy groups, 99mTc-6 and 99mTc-7 were prepared from the ferrocenyl precursors and purified by Radio-HPLC. Corresponding Re compounds were also synthesized and characterized as structure-referenced congeners of 99mTc-labeled complexes. The 99mTc-labeled complexes were lipophilic and stable both i...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Deep blue phosphorescent iridium(III) cyclometalates with o-carboranes
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Minji Kim, Min Hyung LeeAbstractHeteroleptic iridium(III) cyclometalates, [5-(2-MeCB)dfppy]2Ir(LX) (2-MeCB = 2-methyl-o-carboran-1-yl; dfppy = 2-(4,6-difluorophenyl)pyridinato-C2,N; LX = picolinate (5a) or tetrakis(1-pyrazolyl)borate (5b)), with o-carborane at the 5-position of the phenyl ring of the dfppy ligand were prepared to investigate the impact of the o-carborane cage on the blue phosphorescence of complexes. X-ray diffraction analysis of 5a revealed a distorted octahedral coordination geometry around the...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of a series of polymer-immobilized clusters of osmium
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Wenting Liang, Dan Li, Pui-Ling Lau, Linli Xu, Cheng Yang, Mingdeng Wei, Wesley Ting-Kwok Chan, Wai-Yeung WongAbstractTreatment of [Os3(CO)10(NCMe)2] with an equimolar amount of 4-vinylpyridine, 4-ethynylpyridine and 4-ethylpyridine at room temperature readily gave the cluster complexes [Os3(μ-H)(CO)10(μ-NC5H3CH = CH2)] 1, [Os3(μ-H)(CO)10(μ-NC5H3C≡CH)] 2 and [Os3(CO)10(μ-H)(μ-NC5H3CH2CH3)] 3, respectively. The corresponding ruthenium analogue of 1, [Ru3(μ-H)(CO)10(μ-NC5H3CH = CH2)] 4, wa...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Unprecedented formation of a μ-oxobridged polymeric copper(II) complex: Evaluation of catalytic activity in synthesis of 5-substituted 1H-tetrazoles
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Samaresh Layek, Rakesh Ganguly, Devendra D. PathakAbstractThe reaction of CuCl2·2H2O with Schiff base ligand, 4-[(2-hydroxy-3-methoxybenzylidene)amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3-one] (hmdpH), in 1:1 molar ratio led to a novel and unprecedented oxo-bridged polymeric copper (II) complex, [Cu(μ-O) (hmdp)]n. The complex was isolated as crystalline solid and characterized by FTIR, UV–visible and EPR spectroscopic techniques. The molecular structure of the complex was also determined by single crystal X-ray...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Diiron ethanedithiolate complexes with acetate ester: Synthesis, characterization and electrochemical properties
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Meng Lian, Jiao He, Xiao-Yong Yu, Chao Mu, Xu-Feng Liu, Yu-Long Li, Zhong-Qing JiangAbstractFive diiron ethanedithiolate complexes bearing acetate ester have been prepared and characterized. Esterification of complex [{μ-SCH2CH(CH2OH)S}Fe2(CO)6] (1) with acetic acid in the presence of N,N′-dicyclohexylcarbodiimide and 4-dimethylaminopyridine gave the acetate ester [{μ-SCH2CH(CH2O2CCH3)S}Fe2(CO)6] (2) in 94% yield. Further treatment of complex 2 with a monophosphine ligand triphenylphosphine, tricyclohexylphosphin...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Transition metal-free regioselective cross-coupling of azine N-oxides with cymantrenyl lithium
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Alexandra A. Musikhina, Irina A. Utepova, Oleg N. Chupakhin, Valery N. Charushin, Pavel A. SlepukhinAbstractThe facile CC coupling reaction of activated forms of azaaromatics (azine-N-oxides) with cymantrenyl lithium, as a nucleophile, has first been carried out. It has been established that aromatization of intermediate adducts can be realized through either oxidative or eliminative pathways, depending on the structure of the starting azine N-oxide. In particular, the dihydroazinyl intermediates, bearing the additional N(4)...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research

Bisferrocene-containing ionic liquid supported on silica coated Fe3O4: A novel nanomagnetic catalyst for the synthesis of dihydropyrano[2,3-c]coumarin derivatives
Publication date: 1 September 2018Source: Journal of Organometallic Chemistry, Volume 870Author(s): Reza Teimuri-Mofrad, Somayeh Esmati, Shabnam Tahmasebi, Mahdi Gholamhosseini-NazariAbstractNanomagnetic bisferrocene-containing ionic liquid supported on silica coated Fe3O4 (Fe3O4@SiO2@imidazol-bisFc[HCO3]) as a novel heterogeneous catalyst was synthesized and the structure and morphology of nanomagnetic catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microsco...
Source: Journal of Organometallic Chemistry - July 6, 2018 Category: Chemistry Source Type: research