Polymer supported triazine based palladium complex catalyzed double carbonylation reaction of halo aryl compounds for the synthesis of α-ketoamides
Publication date: Available online 7 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Sk Safikul Islam, Rostam Ali Molla, Sabyasachi Ta, Nasima Yasmin, Debasis Das, Sk Manirul IslamAbstractNovel polystyrene incorporated Palladium (II) catalyst was developed and well characterized. The efficiency of the supported Pd(II) catalytic material was checked for double carbonylation reaction of 2° amines and aryl iodides to their corresponding α-ketoamides under high pressure reaction conditions. The reaction was carried out in 60 psi carbon monoxide pressure. An extensive variety of aryl iodides in comb...
Source: Journal of Organometallic Chemistry - December 8, 2018 Category: Chemistry Source Type: research

Homo- and heterobimetallic azines derived from ferrocene and cyrhetrene: Synthesis, structural characterization and electrochemical studies
Publication date: Available online 7 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Johana Gómez, Diego Sierra, Mauricio Fuentealba, Vania Artigas, A. Hugo KlahnAbstractA new series of asymmetrical heterobimetallic azines [(η5-C5H5)Fe{(η5-C5H4)C(R) = NNC(R1)-(η5-C5H4)Re(CO)3}] (1–3), a 1,1′-disubstituted ferrocenyl azine [Fe{(η5-C5H4)C(Me) = NNC(H)(η5-C5H4)Re(CO)3}2] (4), and symmetrical homobimetallic cyrhetrenyl azines [{(η5-C5H4)C(R) = N}Re(CO)3]2 (5, 6) have been synthesized and were spectroscopically characterized by FT-IR, NMR, EI-MS and cycli...
Source: Journal of Organometallic Chemistry - December 7, 2018 Category: Chemistry Source Type: research

Syntheses, structures and in vitro cytostatic activity of four novel homochiral organotin(IV) phosphonates
Publication date: Available online 5 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Bo-Hang An, Ru-Fen Zhang, Qian-Li Li, Xiu-Mei Du, Jing Ru, Shao-Liang Zhang, Chun-Lin MaAbstractFour novel homochiral organotin phosphonates, namely, (R)-, (S)-[(Me3Sn)2(pemp)(H2O)]n (1, 2) and (R) -, (S)-[(Ph3Sn)2(pemp)2]n (3, 4) [pempH2 = (R)- or (S)-(1-phenylethylamino) methylphosphonic acid], were synthesized and characterized by X-ray diffraction analysis, elemental analysis, FT-IR, NMR (1H, 13C, 31P and 119Sn), TGA (thermogravimetric analysis) and CD (circular dichroism spectra). The structure analysis indicates th...
Source: Journal of Organometallic Chemistry - December 6, 2018 Category: Chemistry Source Type: research

Synthesis of rhenacyclopentadienes and η2:η2-diyne complexes from a labile dirhenium carbonyl and π-conjugated 1,7-octadiynes: Structural and photophysical characterization
Publication date: Available online 4 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Claudia Cardozo, Axel Mendoza, Gabriela Farías, André Luiz Barboza Formiga, Deisy Peña, Franmerly Fuentes, Alejandro Arce, Yomaira OteroAbstractA series of dirhenium carbonyl compounds containing π-conjugated diyne ligands and symmetrical 2,5-bis(aryl)rhenacyclopentadienes has been synthesized by reaction of [Re2(CO)8(CH3CN)2] and 1,8-bis(aryl)-1,7-octadiyne derivatives [aryl = 2-thienyl (a), 2-pyridyl (b), 2-quinolyl (c) and 9-phenanthrenyl (d)]. We found that diyne ligands undergo coordinati...
Source: Journal of Organometallic Chemistry - December 5, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of an acidic nanostructure based on magnetic polyvinyl alcohol as an efficient heterogeneous nanocatalyst for the synthesis of α-aminonitriles
Publication date: Available online 5 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Ali Maleki, Jamal Rahimi, Zoleikha Hajizadeh, Maryam NiksefatAbstractThe present study described design, preparation and characterization of a new magnetic nanocomposite based on polyvinyl alcohol (PVA) as a non-toxic, water-soluble, high mechanical stable and low-cost polymer. Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM) image, transmission electron microscope (TEM) image, X-ray diffraction (XRD) pattern, energy-dispersive X-ray (EDX) analysis and thermogravimetri...
Source: Journal of Organometallic Chemistry - December 5, 2018 Category: Chemistry Source Type: research

Molecular recognition of an adenine derivative by Organoplatinum(II) complexes with hydrogen-bonding functionality
Publication date: Available online 5 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Michael G. Crisp, Poya Kavianpour, Louis M. RendinaAbstractThe first examples of adenine binding by isomeric organoplatinum(II) complexes bearing H-bonding nicotinic and isonicotinic acid ligands are reported. Notably, a subtle switching of the H-bonding functionality from the 3- to 4-position of the pyridyl ring leads to a significant change in both the strength of association and the site of adenine binding.Graphical abstractThe first examples of adenine binding by isomeric organoplatinum(II) complexes bearing H-bondin...
Source: Journal of Organometallic Chemistry - December 5, 2018 Category: Chemistry Source Type: research

Ruthenium(II)-arene complexes with monodentate aminopyridine ligands: Insights into redox stability and electronic structures and biological activity
Publication date: Available online 4 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Flávia Marszaukowski, Ivelise Dimbarre Lao Guimarães, Juliana Paula da Silva, Luis Henrique da Silveira Lacerda, Sergio Ricardo de Lazaro, Márcio Peres de Araujo, Patrícia Castellen, Tania Toyomi Tominaga, René T. Boeré, Karen WohnrathAbstractThe synthesis and spectroscopic characterization of four ruthenium(II) arene complexes with monodentate pyridine derivatives ([(η6–p-cymene)RuCl2L]: L = 2-aminopyridine, 2-methylaminopyridine, 2-benzylaminopyridine, and pyridin...
Source: Journal of Organometallic Chemistry - December 4, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of tetracarbonyl molybdenum and pentacarbonyl tungsten complexes of TADDOL-derived, monodentate P-donor ligands
Publication date: Available online 4 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Ethan C. Cagle, Gary M. GrayAbstractTADDOL-derived P-donor ligands are of interest as ligands in transition metal catalyzed transformations; however, few studies have been conducted on the steric and electronic properties of P-donor ligands derived from TADDOL. To gain more insight into these properties four tetracarbonylmolybdenum(0) and two pentacarbonyltungsten(0) complexes of monodentate P-donor ligands derived from TADDOL have been studied. These studies show that exchanging the chloro substituent on the phosphorus ...
Source: Journal of Organometallic Chemistry - December 4, 2018 Category: Chemistry Source Type: research

Nickel(II) NHC-complexes with tridentate, dianionic ligands
Publication date: Available online 3 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Maximilian H. Clauberg, Darya Schmidt, Jörg Rust, Christian W. Lehmann, Natalia Arefyeva, Mathias Wickleder, Fabian MohrAbstractA family of square planar nickel(II) complexes containing N-heterocyclic carbene ligands as well as tridentate, dianionic ligands was prepared by two different methods. The compounds were characterised by various spectroscopic methods and the solid-state structures were determined by single-crystal X-ray diffraction. Electrochemical studies of the compounds are also reported.Graphical abstr...
Source: Journal of Organometallic Chemistry - December 3, 2018 Category: Chemistry Source Type: research

Design, synthesis, luminescence and non-linear optical properties of 1,3,5-triethynylbenzene-Based Alkynylplatinum(II) terpyridine complexes
Publication date: Available online 1 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Charlotte Po, Chi-Hang Tao, King-Fai Li, Carmen Ka Man Chan, Heidi Li-Ki Fu, Nianyong Zhu, Kok-Wai Cheah, Vivian Wing-Wah YamAbstractA series of 1,3,5-triethynylbenzene-based alkynylplatinum(II) terpyridine complexes has been designed and synthesized. The photophysical properties including UV-vis absorption and emission properties, as well as electrochemical properties of the complexes have been systematically evaluated. Interesting two-photon absorption and two-photon induced luminescence behaviors are also observed for...
Source: Journal of Organometallic Chemistry - December 2, 2018 Category: Chemistry Source Type: research

Synthesis of boron cluster analogs of penicillin and their antibacterial activity
Publication date: Available online 1 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Daria Różycka, Zbigniew J. Leśnikowski, Agnieszka B. OlejniczakAbstractAntimicrobial resistance (AMR) is an exceptional increasing challenge for human health; it is urgently need to develop novel leads that can be developed to clinically useful drugs. The idea to modify old class of antibiotics that has been a cornerstone of medical has been dramatically refreshed searching for ways to overcome antibiotic-resistant bacteria. A very interesting development is the implementation of carboranes in design of pharmaco...
Source: Journal of Organometallic Chemistry - December 1, 2018 Category: Chemistry Source Type: research

Copper(I) complexes of N-alkyl-substituted N-Heterocyclic carbenes
We report herein the synthetic routes to and spectroscopic and structural characterization of a variety of copper complexes bearing small alkyl-substituted N-heterocyclic carbene (NHC) ligands. Complexes of the type [Cu(NHC)X] and [Cu(NHC)2X] (X = Cl) were readily synthesized by reaction of Cu(I)Cl with a variety of the carbenes. The molecular structures of the [Cu(NHC)X] complexes all show two-coordinate Cu(I) atoms in nearly linear arrangements with C(NHC)CuCl angles very close to 180°. Utilizing the smallest alkyl carbene, Me2Im (= 1,3-di-methyl-imidazolin-2-ylidene), the compound adopts an ionic structure featu...
Source: Journal of Organometallic Chemistry - November 30, 2018 Category: Chemistry Source Type: research

New insight into the reactions of organoplatinum(II) complexes with diorganotin dichloride and diisothiocyanate: Oxidative addition, reductive elimination and α-elimination
Publication date: Available online 29 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Badri Z. Momeni, Nastaran Fathi, Milad Moghadasi, Abbas Biglari, Jan JanczakAbstractThe reaction of electron rich [PtMe2(NN)] with SnMe2Cl2 in a 1:3/Pt:Sn mole ratio resulted in formation of Pt(IV) complexes [PtMe2(SnMe2Cl)Cl(NN)] {NN = 4,4ꞌ-Me2bpy (4,4′-dimethyl-2,2′-bipyridine) (7); 5,5ꞌ-Me2bpy (5,5′-dimethyl-2,2′-bipyridine) (8); bphen (4,7-diphenyl-1,10-phenanthroline) (9)}. NMR data show that the resulting complexes exist as the sole product corresponding to that of trans oxidative a...
Source: Journal of Organometallic Chemistry - November 30, 2018 Category: Chemistry Source Type: research

Heterogeneous copper-catalyzed decarboxylative cyclization of 2-benzoylpyridines with α-amino acids leading to imidazo[1,5-a]pyridines
Publication date: Available online 29 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Yang Liao, Chenyu Yan, Rongli Zhang, Mingzhong CaiAbstractThe heterogeneous decarboxylative cyclization reaction between 2-benzoylpyridines and α-amino acids was achieved in toluene at 120 °C in the presence of 15 mol% of l-proline-functionalized MCM-41-supported copper(II) complex [l-Proline-MCM- 41-Cu(OTf)2] and iodine with di-tert-butyl peroxide (DTBP) as oxidant, yielding a variety of 1,3-disubstituted imidazo[1,5-a]pyridines in good to excellent yields. The new supported copper catalyst can be prepare...
Source: Journal of Organometallic Chemistry - November 30, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of ferrocene-functionalized reduced graphene oxide nanocomposite as a supercapacitor electrode material
Publication date: Available online 28 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Reza Teimuri-Mofrad, Raha Hadi, Hassan AbbasiAbstractA novel ferrocene-functionalized rGO as a electrode material is developed. The rGO was successfully functionalized through [1,2] cycloaddition reaction with 1,1′-bis(4-azidobutyl)ferrocene (bA-Fc). The functionalized ferrocene rGO nanocomposite (bA-Fc/rGO) has been completely characterized using FT‐IR, EDX, XRD and SEM. The elimination of the strong azide stretching bond at ∼2100 cm−1 in the FT-IR spectrum of bA-Fc/rGO nanocomposite obviously prove...
Source: Journal of Organometallic Chemistry - November 28, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and optical properties of novel Ir(III) complexes bearing N-heterocycle substituents
Publication date: Available online 26 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Meng Tang, Senqiang Zhu, Rui Liu, Jia Wang, Zheng Zhang, Hongjun ZhuAbstractA series of cationic heteroleptic Ir(III) complexes with different N-heterocycle groups (N-phenothiazinyl, N-indolyl, N-carbazolyl, 3,6-di-tert-butyl-N-carbazolyl) were synthesized and characterized. The photophysical properties of these complexes were systematically investigated. All complexes exhibit strong 1π-π∗ absorption bands in the UV region and broad 1MLCT absorption bands in the visible region. In addition, these complexes ...
Source: Journal of Organometallic Chemistry - November 27, 2018 Category: Chemistry Source Type: research

The Sn–C bond reactivity in 1,1-bis(heteroaryl)-2-triorganostannylethanes toward tungsten carbonyl derivatives
Publication date: Available online 26 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Geng-Wen Yin, Huan Yang, Wei-Yi Guo, Liang-Fu TangAbstractReaction of R3SnCH2CH(3,5-Me2Pz)2 (R = n-Bu, CH2Ph or Ph; Pz = pyrazol-1-yl) with W(CO)5THF in refluxing THF resulted in the oxidative addition of the inactive R3Sn–C bond to the tungsten atom to yield metal-metal bonded complexes CH2CH(3,5-Me2Pz)2W(CO)3SnR3. While reaction of R3SnCH2CH(mim)2 (R = n-Bu or Ph; mim = 1-methylimidazol-2-yl) with W(CO)6 in refluxing dioxane gave only the decarbonylation complexes R3SnCH2CH(mim)2W(CO)4, no analog...
Source: Journal of Organometallic Chemistry - November 27, 2018 Category: Chemistry Source Type: research

Desulfination versus decarboxylation as a means of generating three- and five-coordinate organopalladium complexes [(phen)nPd(C6H5)]+ (n = 1 and 2) to study their fundamental bimolecular reactivity
Publication date: Available online 22 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Zilin Wang, Yang Yang, Paul S. Donnelly, Allan J. Canty, Richard A.J. O'HairAbstractRoutes to the formation of the 1,10-phenanthroline (phen) ligated organopalladium complexes [(phen)Pd(C6H5)]+ and [(phen)2Pd(C6H5)]+ via thermal extrusion of CO2 or SO2 from mono-nuclear, mono-carboxylate or sulfinate complexes [(phen)nPd(O2XC6H5)]+ (X = C or S; n = 1 and 2) are examined using a combination of low energy collision induced dissociation experiments in an ion trap mass spectrometer and DFT calculations. [(phen)Pd(C6...
Source: Journal of Organometallic Chemistry - November 23, 2018 Category: Chemistry Source Type: research

Synthesis and structure of bis(indenyl)-rhodium and -iridium complexes
Publication date: Available online 22 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Vladimir B. Kharitonov, Yulia V. Nelyubina, Irina D. Kosenko, Dmitry A. LoginovAbstractBis(indenyl)-rhodium and -iridium complexes [(η5-indenyl)M(η5-C9H2R5)]PF6 (2a: M = Rh, R = H; 2b: M = Ir, R = H; 3: M = Rh, R = Me) were synthesized by reactions of iodides [(η5-indenyl)MI2]n (1a,b) with indenes in the presence of AgPF6. The structures of 2aSbF6 and 2bPF6 were determined by X-ray diffraction. They have fully eclipsed geometry, in which the bridgehead carbon atoms of the indenyl liga...
Source: Journal of Organometallic Chemistry - November 22, 2018 Category: Chemistry Source Type: research

Impact of bidentate N,C-Chelate ligands on the performance of phosphorescent Pt(II) complexes as oxygen sensors
Publication date: Available online 19 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Faraz Hussain, Xiang Wang, Suning WangAbstractA library of 1,2- cyclometalated Pt(II) complexes based on various bidentate N,C-chelate chromophores have been studied for their uses as luminescent oxygen sensing probes (OSPs). The bidentate chelate ligands have been found to have a distinct impact on the performance of the Pt(II) compounds as OSPs. For some of the complexes, attachment of a dimesityl boron group (BMes2) to the chelate ligands enhances their oxygen sensitivity. For phenyl-1,2,3-triazole (Phtrz) based Pt(I...
Source: Journal of Organometallic Chemistry - November 21, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and chemosensitivity studies of half-sandwich ruthenium, rhodium and iridium complexes containing к1(S) and к2(N,S) aroylthiourea ligands
Publication date: Available online 19 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Agreeda Lapsam, Omar Hussain, Roger M. Phillips, Werner Kaminsky, Mohan Rao KolliparaAbstractThe reaction of [(p-cymene)RuCl2]2 and [Cp*MCl2]2 (M = Rh/Ir) metal precursors with aroylthiourea ligands (L1-L3) yielded a series of neutral mono-dentate complexes 1–9. The neutral mono-dentate coordination of aroylthiourea with metals via S atom was confirmed by single crystal X-ray diffraction study. Further reaction of mono-dentate complexes 1–9 with excess NaN3 in polar solvent resulted in the formation of h...
Source: Journal of Organometallic Chemistry - November 21, 2018 Category: Chemistry Source Type: research

Synthesis, structure, computational and catalytic activities of palladium complexes containing hydrazide based amino-phosphine ligands
Publication date: Available online 19 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Khodayar Gholivand, Mohammad Kahnouji, Yazdan Maghsoud, Mahdieh Hosseini, Stephen Mark RoeAbstractTwo new N, N-bis(diphenylphosphino)-amine ligands [where amine = N-Aminophthalimide (in L1) and Hydrazine dihydrochloride (in L2)] and their Pd(II) complexes, C1 and C2 have been synthesized and characterized by IR and NMR spectroscopies. Single crystal X-ray diffraction techniques have been used to determine the crystal structures of the complexes. Moreover, the catalytic activities of mentioned complexes in Heck coupl...
Source: Journal of Organometallic Chemistry - November 21, 2018 Category: Chemistry Source Type: research

Polymer immobilized [Mg@PS-anthra] complex: An efficient recyclable heterogeneous catalyst for the incorporation of carbon dioxide into oxiranes at atmospheric pressure and Knoevenagel condensation reaction under solvent free condition
Publication date: Available online 20 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Ranjan Kumar Mondal, Sk Riyajuddin, Aniruddha Ghosh, Swarbhanu Ghosh, Kaushik Ghosh, Sk.Manirul IslamAbstractChemical fixation of CO2 into the organic molecules is very challenging from the perspective of greenhouse gas consumption and manufacturing of chemicals with C1 backbone. The process was developed with the synthesis of an efficient polystyrene functionalized Magnesium-anthranilic acid complex (Mg@PS-anthra). The catalytic system was successfully explored as a heterogeneous catalyst for the synthesis of cyclic ca...
Source: Journal of Organometallic Chemistry - November 21, 2018 Category: Chemistry Source Type: research

EPR spectroscopic study of Ni(I) species in the catalyst system for ethylene polymerization based on α-diimine Ni(II) complex activated by MMAO
Publication date: Available online 16 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Igor E. Soshnikov, Nina V. Semikolenova, Konstantin P. Bryliakov, Artem A. Antonov, Wen-Hua Sun, Evgenii P. TalsiAbstractUsing EPR spectroscopy, nickel(I) species formed in the catalyst system 1/MMAO for ethylene polymerization has been investigated (1 = LNiBr2, L = 1,4-bis-2,4,6-dimethylphenyl-2,3-dimethyl-1,4-diazabuta-1,3-dien). It has been shown that diamagnetic cationic complex [LNiII-tBu]+[MeMMAO]– (2) persists in system 1/MMAO at low temperatures, but rapidly decays at 25 °C to give new EPR ac...
Source: Journal of Organometallic Chemistry - November 17, 2018 Category: Chemistry Source Type: research

Synthesis of highly branched polyethylene using para-benzhydryl substituted iminopyridyl Ni(II) and Pd(II) complexes
Publication date: Available online 17 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Ruiping Li, Jinlong Sun, Susu Tian, Yang Zhang, Dengfeng Guo, Weimin Li, Fuzhou WangAbstractA series of para-benzhydryl substituted iminopyridyl-based Ni(II) and Pd(II) complexes with systematically varied ligand steric, [2,6-R2-4-CHPh2C6H2N = CH(NC6H5)]MX2 (MX2 = NiBr2 or PdCl2; R = -CHPh2 (Ni1,Pd1); R = iPr (Ni2,Pd2); R = Et (Ni3,Pd3); R = Me (Ni4,Pd4)], were synthesized and applied to ethylene oligo-/polymerization in combination with methylaluminoxane (MAO). These Ni(II) catalysts displayed g...
Source: Journal of Organometallic Chemistry - November 17, 2018 Category: Chemistry Source Type: research

The photochemical and photophysical properties of the [[M3(dppm)3(CO)]]2+ clusters (M = Pd, Pt)
Publication date: 1 February 2019Source: Journal of Organometallic Chemistry, Volume 880Author(s): Pierre D. HarveyAbstractThis title clusters were first reported by Puddephatt and his group over 30 years ago, and their reactivity was thoroughly investigated, namely including the oxidative additions of inorganic and organic substrates and host-guest associations. Then, Mugnier and Harvey, scrutinized in large detail the rich electrochemical behaviour of the [[Pd3(dppm)3(CO)]]2+ cluster, [Pd32+], namely of the reduced paramagnetic species [Pd3•+] during the 1997–2010 period. Concurrently, Harvey and his group con...
Source: Journal of Organometallic Chemistry - November 16, 2018 Category: Chemistry Source Type: research

Theoretical study on the intramolecular oxyamination involved in Rh(III)-catalyzed cyclization of unsaturated alkoxyamines
Publication date: Available online 14 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Siwei Bi, Yueyue Wang, Yuan-Ye Jiang, Yuxia LiuAbstractThe unexpected oxyamination reaction of O, ω-unsaturated alkoxyamines was found experimentally. The mechanistic issues were studied by DFT calculations. It is suggested that the reaction undergoes [3 + 2] cyclic addition, O-N bond cleavage, C-N reductive elimination, and the Rh-N unit protonation, generating the product and regenerating the active catalyst. The nitrene Rh(V) species containing a Rh-C bond rather than a Rh-O bond was suggested to be i...
Source: Journal of Organometallic Chemistry - November 15, 2018 Category: Chemistry Source Type: research

La-mediated dehydrogenation and CC bond cleavage of 1,4-pentadiene and 1-pentyne: Spectroscopy and formation of La(C5H6) and La(C3H4) radicals
Publication date: Available online 12 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Wenjin Cao, Yuchen Zhang, Dong-Sheng YangAbstractLa atom reactions with 1,4-pentadiene and 1-pentyne are carried out in a laser-vaporization molecular beam source. Both reactions yield a predominant La(C5H6) radical from ligand dehydrogenation and a minor La(C3H4) species from CC bond cleavage. The metal-hydrocarbon radicals are characterized with mass-analyzed threshold ionization (MATI) spectroscopy and quantum chemical computations. The MATI spectra of each species formed by the two reactions are essentially identica...
Source: Journal of Organometallic Chemistry - November 14, 2018 Category: Chemistry Source Type: research

Imidazole-hydrazone efficient and simple ligand for palladium-catalyzed Suzuki-Miyaura cross-coupling reaction in water under IR-irradiation
Publication date: Available online 13 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Martín Camacho-Espinoza, José Guillermo Penieres-Carrillo, Hulme Rios-Guerra, Selene Lagunas-Rivera, Fernando Ortega-JiménezAbstractA highly efficient catalytic system based on Pd(OAc)2 and imidazole-hydrazone (L1-L3) has been developed for Suzuki–Miyaura cross-coupling reaction in water under aerobic conditions using IR irradiation. The system can tolerate a wide range of functionalized arylboronic acids and aryl halides. Furthermore, this protocol is also applicable and available for hetero-...
Source: Journal of Organometallic Chemistry - November 14, 2018 Category: Chemistry Source Type: research

Origins of chemoselectivity of Rh(III)-Catalyzed C–H activation of N-(pivaloyloxy)benzamide: Insights from density functional theory calculations
Publication date: Available online 13 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Zhong-xin Fu, Juan LiAbstractAn unprecedented Rh(III)-catalyzed C–H activation of N-(pivaloyloxy)benzamide was recently reported by Feng et al. In this transformation, the substituent on the alkyne controls the chemoselectivity (annulation or hydroarylation). Given the importance of this novel strategy, we performed a density functional theory study to clarify the origins of the experimentally observed chemoselectivity. The results of our calculations showed that the conventional annulation of N-(pivaloyloxy)benza...
Source: Journal of Organometallic Chemistry - November 14, 2018 Category: Chemistry Source Type: research

Syntheses and characterization of neutral and cationic cyclic (alkyl)(amino)carbene mercury [cAAC-Hg(II)] complexes
Publication date: 1 February 2019Source: Journal of Organometallic Chemistry, Volume 880Author(s): Deependra Bawari, Sandeep Kumar Thakur, Krishna K. Manar, Bhupendra Goswami, V.R. Sabari, Angshuman Roy Choudhury, Sanjay SinghAbstractReactions of cyclic (alkyl)(amino)carbenes, cAACMe and cAACcy with equimolar quantity of HgX2 salts afforded their corresponding halide bridged dimeric complexes, [cAACMeHgCl(μ-Cl)]2 (1), [cAACcy∙HgCl(μ-Cl)]2 (2), [cAACMe∙HgI(μ-I)]2 (3) and [cAACcy∙HgI(μ-I)]2 (4) (Me = methyl and cy = cyclohexyl). It has been possible to perform stepwise substitution of Br− in [...
Source: Journal of Organometallic Chemistry - November 14, 2018 Category: Chemistry Source Type: research

Homolytically weak metal-carbon bonds make robust controlled radical polymerizations systems for “less-activated monomers”
This article is an account of work, mostly carried out in the authors' laboratory, on the use of organometallic compounds with homolytically fragile metal-carbon bonds as dormant species in the controlled radical polymerization of a variety of monomers in what is now universally called “organometallic-mediated radical polymerization” (OMRP). The article retraces a brief history of OMRP, shows how it can potentially intervene in every radical polymerization process based on atom transfer (ATRP), which is a more popular controlling method where the metal plays a catalytic role, and how it can be in competition wi...
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

Triorganotin coordination polymers based on three dicarboxylate ligands containing flexible SS bonds: synthesis, structures and in vitro anti-tumor activity.
Publication date: Available online 12 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Fei-fei Yan, Qi Zhu, Qian-Li Li, Ru-Fen Zhang, Chun-Lin MaAbstractSix new triorganotin complexes, [(R3Sn)2(O2CC5H3NS)2]n (R = Me: 1; n-Bu: 2), [(R3Sn)2(O2CC6H4S)2]n (R = Me: 3; n-Bu: 4), [(R3Sn)2(O2CCH2S)2]n (R = Me: 5; n-Bu: 6) have been obtained by the reaction of R3SnCl (R = Me, n-Bu) with the corresponding dicarboxylate ligands (H2L1 = 6,6’-dithiodinicotinic acid, H2L2 = 2,2’-dithiodibenzoic acid, H2L3 = dithiodiglycolic acid). All the compounds were characterized by elemental...
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

Synthesis of new functional siloxane derivatives of limonene. Part I: Combination of hydrosilylation and hydrothiolation reactions
This article discusses the synthesis of mono- and difunctional siloxane derivatives of limonene obtained by hydrosilylation followed by hydrothiolation. It has been shown that, because of the different reactivity of the double bonds present in the limonene molecule, selective addition to one of them can be performed, which opens the possibility of obtaining various siloxane derivatives of limonene that can be used as initial monomers in the synthesis of polymers.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

The synthesis and characterization of Re(CO)3 pyca-anthraquinone conjugates
Publication date: Available online 10 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Briana R. Schrage, Richard S. Herrick, Christopher J. ZieglerAbstractThree rhenium carbonyl anthraquinone species have been synthesized (compounds 1–3) using a one-pot methodology. The synthesis involves use of the pyridine-2-carboxyaldehyde, which reacts with primary amines and Re(CO)5X to form a metal bound diamine. Reactions with Re(CO)5Cl and Re(CO)5Br afford compounds 1 and 2 respectively, where the anthraquinone unit is pendant to the pyridine aldimine unit. Compound 3 can be produced upon replacement of the...
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

Ferrocenyl-functionalized carbon nanotubes with greatly improved surface reactivity for enhancing electrocapacitance
In conclusion, ferrocenyl functionalized carbon nanotubes are ideal electrode materials for low cost and high efficiency electrochemical supercapacitors.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

Facile synthesis and optoelectronic exploration of silylthiophene substituted benzodithiophene polymer for organic field effect transistors
Publication date: Available online 10 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Chinna Bathula, Abhijit KadamAbstractIn this article we report the synthesis, characterization and optical properties of novel conjugated polymer (PBDTDPP) based on silylthiophene substituted benzo[1,2-b:4,5-b]dithiophene (BDT) donor and diketopyrrolopyrrole (DPP) acceptor by Stille polymerization reaction. Synthesized polymer exhibited strong and broad absorption. Optical band gap of the polymer is determined by band edge and is found to be 1.31 eV. Polymer is thermally stable up to 303 °C. By using cyclic volt...
Source: Journal of Organometallic Chemistry - November 12, 2018 Category: Chemistry Source Type: research

Effect of hydrogen bonding on ligand substitution and its implication for the Heck reaction
Publication date: Available online 8 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Jiwu Ruan, Jonathan A. Iggo, Jianliang XiaoAbstractSimple hydrogen-bond donating ammonium cations are found to hydrogen-bond with the halo ligand of a key intermediate in the Heck reaction, [Pd(diphosphine)PhBr], and promote the substitution of the halide by a phosphine ligand. Furthermore, upon introduction of an HBD, the palladium intermediate reacts with an electron-rich olefin to afford the expected Heck product, whereas no reaction was observed without the HBD. These observations support the hypothesis that HBDs acc...
Source: Journal of Organometallic Chemistry - November 9, 2018 Category: Chemistry Source Type: research

Palladium-catalyzed N-Arylation of 1-substituted-1H-tetrazol-5-amines
Publication date: Available online 8 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Andrea M. Nikolić, Vladimir Ajdačić, Igor M. OpsenicaAbstractA palladium-catalyzed N-arylation of 1-substituted-1H-tetrazol-5-amines has been described for the first time. The reaction provides good yields of desired products with broad substrate scope and good functional group tolerance.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - November 9, 2018 Category: Chemistry Source Type: research

The photochemical and photophysical properties of the [[M3(dppm)3(CO)]]2+ clusters (M = Pd, Pt)
Publication date: Available online 7 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Pierre D. HarveAbstractThis title clusters were first reported by Puddephatt and his group over 30 years ago, and their reactivity was thoroughly investigated, namely including the oxidative additions of inorganic and organic substrates and host-guest associations. Then, Mugnier and Harvey, scrutinized in large detail the rich electrochemical behaviour of the [[Pd3(dppm)3(CO)]]2+ cluster, [Pd32+], namely of the reduced paramagnetic species [Pd3•+] during the 1997–2010 period. Concurrently, Harvey and his group...
Source: Journal of Organometallic Chemistry - November 8, 2018 Category: Chemistry Source Type: research

The phosphinoboration of 2-diphenylphosphino-benzaldehyde and related aldimines
Publication date: Available online 5 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Meagan B. Kindervater, Justin F. Binder, Samuel R. Baird, Christopher M. Vogels, Stephen J. Geier, Charles L.B. Macdonald, Stephen A. WestcottAbstractWe have investigated the addition of a simple phosphinoboronate ester, Ph2PBpin (pin = 1,2-O2C2Me4), to 2-diphenylphosphinobenzaldehyde (2-Ph2PC6H4C(O)H) and related aldimine derivatives (2-Ph2PC6H4C(NR)H) as a simple and effective strategy for generating unique diphosphine ligands bearing a pendant Lewis-acid Bpin group. These reactions proceed selectively to give one ...
Source: Journal of Organometallic Chemistry - November 6, 2018 Category: Chemistry Source Type: research

Co(III) phenylacetylide complexes supported by tetraazamacrocyclic ligands: Syntheses and characterizations
Publication date: Available online 5 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Brandon L. Mash, Tong RenAbstractReported herein are the syntheses and characterization of mono- and bis- Co(III) phenylacetylide complexes trans-[Co(L)(C2Ph)Cl]+ (2a/b) and trans-[Co(L)(C2Ph)2]+ (3a/b), where L is MPD (a) or MPC (b) (MPD = 5,12-dimethyl-7,14-diphenyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene, MPC = 5,12-dimethyl-9,14-diphenyl-1,4,8,11-tetraazacyclotetradecane). All the new complexes were characterized by UV–Vis, FT-IR spectroscopic and voltammetric techniques. Single crystal X-ray diffrac...
Source: Journal of Organometallic Chemistry - November 6, 2018 Category: Chemistry Source Type: research

Dendron-functionalized Fe3O4 magnetic nanoparticles with palladium catalyzed CN insertion of arylhalides for the synthesis of tetrazoles and benzamide
Publication date: Available online 5 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Mohammad Ali Karimi Zarchi, Seyed Shahab Addin Darbandizadeh Mohammad AbadiAbstractA novel method for the one-pot synthesis of 5-substituted 1-H tetrazole and Benzamide from arylhalide containing in situ CN insertion from inorganic salt source was accomplished in presence of a new magnetically catalyst, palladium on surface-modified Schiff-Base complex. K2[Ni(CN)4] plays a role of nontoxic inorganic cyanide source in arylhalide Nucleophilic substitution. The synthesized Pd-Schiff-Base@Fe3O4MNPs was characterized by vario...
Source: Journal of Organometallic Chemistry - November 6, 2018 Category: Chemistry Source Type: research

Syntheses and characterization of neutral and cationic cyclic(alkyl)(amino)carbene mercury [cAAC-Hg(II)] complexes
Publication date: Available online 3 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Deependra Bawari, Sandeep Kumar Thakur, Krishna K. Manar, Bhupendra Goswami, V.R. Sabari, Angshuman Roy Choudhury, Sanjay SinghAbstractReactions of cyclic (alkyl)(amino)carbenes, cAACMe and cAACcy with equimolar quantity of HgX2 salts afforded their corresponding halide bridged dimeric complexes, [cAACMeHgCl(μ-Cl)]2 (1), [cAACcy∙HgCl(μ-Cl)]2 (2), [cAACMe∙HgI(μ-I)]2 (3) and [cAACcy∙HgI(μ-I)]2 (4) (Me = methyl and cy = cyclohexyl). It has been possible to perform stepwise substitution of Br−...
Source: Journal of Organometallic Chemistry - November 4, 2018 Category: Chemistry Source Type: research

Photoluminescence of platinum(II) diethynylphenanthroline organometallic complexes with bis-arylethynyl derivatives in solution and solid state
Publication date: Available online 2 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Michito Shiotsuka, Rikuo Ono, Yoshihiro Kurono, Taiki Asano, Yusuke SakaeAbstractPlatinum(II) phenanthroline organometallics, Pt(3,8-Phen≡H)(≡Ph-R)2 (1H–11H), of 11 respective arylethynyl ligands with different substituents: R = H (1H), 4-F (2H), 3-F (3H), 2-F (4H), 4-Me (5H), 4-CF3 (6H), NO2 (7H), 4-COOMe (8H), 4-t-Bu (9H), 3,5-di-CF3 (10H), and 3,5-di-t-Bu (11H) were prepared from our reported complexes, Pt(3,8-Phen≡TMS)(≡Ph-R)2, by a deprotection reaction of a trimethylsilyl group. Th...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

Half‒Sandwich (η6‒p‒Cymene) Ruthenium(II) complexes bearing 5‒Amino‒1‒Methyl‒3‒Phenylpyrazole Schiff base ligands: Synthesis, structure and catalytic transfer hydrogenation of ketones
Publication date: Available online 2 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Madhan Ramesh, Galmari VenkatachalamAbstractNew (η6‒p‒cymene) ruthenium(II) complexes containing Schiff base ligands of the general composition [RuCl(η6‒p‒cymene)(L1‒3)] have been synthesized. The complexes were characterized by analytical and spectral (FT‒IR, UV–Vis, 1H NMR and 13C NMR) methods. The molecular structure of the representative complex [RuCl(η6‒p‒cymene)(L3)] 6 was determined by single crystal X−ray diffraction studies, revealing a pseudo-octahedral piano stool geomet...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

Synthesis and evaluation of Naphthalene-1, 8-dithiolate chelating ruthenium carbene catalyst for Z-Stereoretentive olefin metathesis
Publication date: Available online 2 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Tao Wang, Qingxiao Xie, Weijie Guo, Shutao Wu, Huiqing Zhang, Jianhui WangAbstractA highly Z-stereoretentive olefin metathesis ruthenium carbene catalyst containing a naphthalene-1,8-dithiol ligand was synthesized, and the structure was determined by single-crystal X-ray diffraction. The new ruthenium carbene catalyst could catalyze cross-metathesis reactions of terminal alkenes with (Z)-but-2-ene-1,4-diol to give highly Z-stereoretentive products. Like to other ruthenium carbene catalysts, the new complex tolerates many...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

Activation of thiosaccharin at a polynuclear osmium cluster
Publication date: Available online 2 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Tamanna Pinky, Md Matiar Rahman, Shishir Ghosh, Kazi A. Azam, Md Jadu Mia, Md Mahbub Alam, Derek A. Tocher, Michael G. Richmond, Shariff E. KabirAbstractThe reaction of thiosaccharin (tsacH) with the triosmium cluster [Os3(CO)10(NCMe)2] furnishes the decacarbonyl isomers [HOs3(CO)10(μ-S-tsac)] (1) and [HOs3(CO)10(μ-N,S-1,3-tsac)] (2) in a 3:1 ratio at room temperature. These isomers differ by the coordination mode displayed by tsac ligand. The tsac moiety functions as an edge-bridging ligand via the sulfur atom in ...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

Synthesis and properties of stimuli-responsive ferrocene-and azobenzene-based copolymers P(FHEMA-co-MAAT)s
Publication date: Available online 3 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Amin Khan, Li Wang, Haojie Yu, Muhammad Haroon, Raja Summe Ullah, Ahsan Nazir, Tarig Elshaarani, Muhammad Usman, Shah Fahad, Kaleem-ur-Rehman NaveedAbstractThree novel polymers (P(FHEMA-co-MAAT)s) having redox and photoresponsive moieties were prepared by free radical polymerization. The structures and molecular weights of the synthesized copolymers were characterized by nuclear magnetic resonance (1H NMR) and gel permeation chromatography (GPC) respectively. Thermal properties, optical features and electroactive propert...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

N-methylation versus oxidative addition using MeI in the reaction of organoplatinum(II) complexes containing pyrazine ligand
Publication date: Available online 3 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Fatemeh Niroomand Hosseini, Zahra Farasat, S. Masoud Nabavizadeh, Guang Wu, Mahdi M. Abu-OmarAbstractThe new cyclometalated platinum(II) complexes [PtMe(CˆN)(pyrazine)] [CˆN = benzo[h]quinolate (bhq), 1a; CˆN = 2-phenylpyridinate (ppy), 1c] have been prepared by the reaction of corresponding dimethylsulfide complexes with pyrazine. These complexes contain two potential nucleophilic centers, Pt(II) center and free N atom of pyrazine which can compete in the reaction with methyl iodide to give Pt(IV)...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research