Catalytic reactivity of the complexes [Pd{(Ph2P)2N(tBu)-P,P´}X2], X = Cl, Br, I, in the Suzuki-Miyaura C−C coupling reaction: Probing effects of the halogeno ligand X− and the ligand's tBu group
Publication date: Available online 15 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Polydoros-Chrysovalantis Ioannou, Cécile Arbez-Gindre, Maria Zoumpanioti, Catherine P. Raptopoulou, Vassilis Psycharis, Ioannis D. Kostas, Panayotis KyritsisAbstractThe synthesis, as well as the spectroscopic and structural characterization of three analogous palladium(II) complexes, [Pd{(Ph2P)2N(tBu)-κ2P,P´}X2], X = Cl, Br, I, is presented. X-ray crystallography studies revealed a similar square planar PdP2X2 first coordination sphere among the three complexes. The catalytic reactivity of these co...
Source: Journal of Organometallic Chemistry - October 16, 2018 Category: Chemistry Source Type: research

Facile synthesis of magnetic recyclable palladium-gold alloy nanoclusters catalysts PdAur/Fe3O4@LDH and its catalytic applications in Heck reaction
Publication date: Available online 16 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Jin Li, Yajuan Wang, Shunwang Jiang, Hui ZhangAbstractA series of novel magnetic recyclable PdAu nanoclusters (NCs) catalysts x-PdAur/Fe3O4@LDH (x: Pd loading in wt%, r: Au/Pd molar ratio, LDH: layered double hydroxide, here refers the typical MgAl-LDH) were synthesized by a facile polyol reduction followed sol immobilization of PdAur–PVP on core@shell support Fe3O4@LDH. Systematic characterizations reveal that the obtained catalysts possess the honeycomb-like core@shell, and the ultrafine PdAu alloy nanoclusters w...
Source: Journal of Organometallic Chemistry - October 16, 2018 Category: Chemistry Source Type: research

N-Acyclic carbene complexes supported by meso-Ph2PCH2P(Ph)- CH2P(Ph)CH2PPh2 (meso-dpmppm) as an asymmetric pincer ligand
Publication date: Available online 13 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Tomoaki Tanase, Mari Urabe, Natsumi Mori, Satoko Hatada, Sayo Noda, Hiroe Takenaka, Kanako Nakamae, Takayuki NakajimaAbstractReaction of [PtCl2(cod)] with a tetraphosphine meso-bis[(diphenylphosphinomethyl)- phenylphosphino]methane (meso-dpmppm), afforded mononuclear PtII complexes, [PtCl(meso-dpmppm−κ3)]X (X = Cl (1a), PF6 (1b)); the meso-dpmppm ligand coordinates to the PtII ion tightly with two outer and one inner phosphorus atoms to form fused six- and four-membered chelate rings which is regarded as ...
Source: Journal of Organometallic Chemistry - October 14, 2018 Category: Chemistry Source Type: research

The coordination and activation of azobenzene by Ru5(μ5-C) cluster complexes
Publication date: Available online 11 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Richard D. Adams, Humaiara Akter, Mark D. Smith, Jonathan D. TedderAbstractThe reaction of Ru5(μ5-C)(CO)15, 1 with azobenzene, PhN = NPh, yielded the pentaruthenium carbido cluster compound Ru5C(CO)13(C6H4N=NC6H5)[μ-H], 4 containing a chelating ortho-metalated azobenzene ligand on one of the ruthenium atoms in a opened square-pyramidal Ru5C cluster. Compound 4 is electronically unsaturated and it readily adds one CO ligand at 25 °C to yield the electronically saturated complex Ru5C(CO)14(C6H4N=NC6H5)[μ...
Source: Journal of Organometallic Chemistry - October 11, 2018 Category: Chemistry Source Type: research

Water soluble new bimetallic catalyst [CuZn(bz)3(bpy)2]PF6 in hydrogen peroxide mediated oxidation of alcohols to aldehydes/ketones and C-N functional groups
Publication date: Available online 9 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Ibanphylla Syiemlieh, M. Asthana, S.K. Asthana, S.,D. Kurbah, A. Koch, R.A. LalAbstractA new heterobimetallic [CuZn(bz)3(bpy)2]PF6 has been synthesized from commercially available starting materials. Its structure has been established by molar conductance, magnetic moment, IR, electronic, ESR and X-ray crystallography. Its catalysis has been established in hydrogen peroxide mediated oxidation of alcohols to aldehydes and ketones and direct formation of oximes.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 9, 2018 Category: Chemistry Source Type: research

Synthesis and intramolecular electronic interactions of hexaarylbenzene bearing redox-active Cp*(dppe)Fe-C≡C- termini
Publication date: Available online 6 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Yuya Tanaka, Munetaka AkitaAbstractHexaphenyl(1) and hexathienyl-benzene (2) complexes with the six redox-active Cp*(dppe)Fe-C≡C- units are synthesized and their properties in terms of molecular junction are investigated. Both complexes show stepwise multi-redox processes and IVCT bands in the NIR region upon progressive oxidation from the neutral to hexacationic state, as a result of intramolecular electron transfer processes via troidal conjugation through the peripheral aromatic rings. Judging from the KC and Vab...
Source: Journal of Organometallic Chemistry - October 7, 2018 Category: Chemistry Source Type: research

Microwave-assisted green oxidation of alcohols with hydrogen peroxide catalyzed by iron complexes with nitrogen ligands
Publication date: Available online 5 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Irene Sofia Cozzi, Corrado Crotti, Erica FarnettiAbstractOxidation of primary and secondary alcohols, including two diols and glycerol, with H2O2 was catalyzed by the iron(II) complexes [FeL3](OTf)2 (L = 2,2′-bipyridine, 2,2′-bipyrimidine, 1,10-phenanthroline and substituted derivatives) and [FeL2](OTf)2 (L = bis(2-pyridinylmethyl)amine, 2,6-di(2-pyridyl)pyridine). The reactions were performed in acetonitrile, water or mixed solvent (typically water/acetonitrile 4:1) in a microwawe reactor at low power...
Source: Journal of Organometallic Chemistry - October 6, 2018 Category: Chemistry Source Type: research

New phosphorus ylide palladacyclic: Synthesis, characterization, X-Ray crystal structure, biomolecular interaction studies, molecular docking and in vitro cytotoxicity evaluations
Publication date: Available online 5 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Kazem Karami, Mahzad Rahimi, Mostafa Zakariazadeh, Orhan Buyukgungor, Zahra AmirghofranAbstractThe ylide-phosphonium salt [PPh3CH2C(O)CH2Cl]+Cl− was reacted with Pd(OAc)2 to give the chloro-bridged dinuclear complex [Pd{C(H)PPh3C(O)CH2Cl}(μ-Cl)(OAc)]2, which experienced bridge cleavage reactions with triphenylphosphine (PPh3) and pyridine (Py), and to prepare the new orthometallated complexes [Pd{(C,C)-C6H4PPh2C(H)C(O)CH2Cl}L]Cl, [L = PPh3 (1) and Py (2)]. The complexes were identified and characterized using...
Source: Journal of Organometallic Chemistry - October 6, 2018 Category: Chemistry Source Type: research

(η6-Benzene)Ru(II) half-sandwich complexes of pyrazolated chalcogenoethers for catalytic activation of aldehydes to amides transformation
Publication date: Available online 22 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Kamal Nayan Sharma, Munsaf Ali, Avinash Kumar Srivastava, Raj Kumar JoshiAbstractThe reactions of [(η6-C6H6)RuCl(μ-Cl)]2 with chalcogenoether substituted 1H-pyrazole ligands (L1-L3) in methanol has endowed three novel Ru(II) half-sandwich complexes [(η6-C6H6)RuCl(L)]PF6 (1–3) in high yield under the ambient reaction conditions. The NMR, MS and FT-IR spectral techniques were used to acquaint with their structures. The molecular structures of the complexes 2 and 3 was established with X-ray crystallograp...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Dithiolene transfer to the molybdenum nitrosyl complex [CpMo(CO)2(NO)]: Formation of bimetallic complexes
Publication date: Available online 26 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Harry Adams, Liam Grimes, Michael J. Morris, Craig C. RobertsonAbstractThe reaction of the nitrosyl complex [CpMo(CO)2(NO)] (Cp = η-C5H5) with the nickel dithiolene complex [Ni(S2C2Ph2)2] produces the expected dimolybdenum complex [Mo2(NO)2(μ-S2C2Ph2)2Cp2], but only as a minor product (13% yield). The major product (41%) consists of two separable isomers of the tetranuclear complex [Mo2Ni2(NO)2(μ-S2C2Ph2)4Cp2], which comprises two CpMo(NO)Ni(S2C2Ph2)2 units joined through bridging sulfur atoms. The isomer...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Cyclization of ortho-alkynylphenylphosphine P-ylides; dependence on ylide nucleophilicity
Publication date: Available online 27 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Jing-Jing Hou, You-Zhi Xu, Zhen-Jie Gan, Xu Zhao, Zheng Duan, Francois MatheyAbstractP=CH2 ylides derived from ortho-alkynylphenylphosphines readily cyclize to give phosphindole derivatives. With a stabilized ylide such as P=CHC(O)Ph, the outcome of the reaction is completely different. The reaction proceeds at high temperature and produces phosphanaphthalenes.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

White polymer light-emitting diodes based on dibenzo-24-crown-8 decorated orange-emitting iridium complexes
Publication date: Available online 27 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Ming Luo, Aihui Liang, Dewang Liu, Han Wang, Zhiping Wang, Yi Chen, Tian CaoAbstractTwo orange phosphorescent iridium complexes decorated by dibenzo-24-crown-8 unit as the dopants were used into polymer light-emitting diodes (PLEDs) with a configuration of ITO/PEDOT:PSS/emission layer (EML)/CsF/Al. Monochromic orange-emitting PLEDs using complex 2 as dopant and poly(N-vinylcarbazole) (PVK) as host exhibit best device performance with a peak luminous efficiency (LE) of 8.94 cd/A at a current density of 1.3 mA/cm2 an...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

N-heterocyclic carbene palladium(II)-catalyzed Suzuki-Miyaura cross coupling of N-acylsuccinimides by C-N cleavage
Publication date: Available online 27 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Tao Wang, Jiarui Guo, Hengjin Wang, Han Guo, Dingli Jia, Wen Zhang, Lantao LiuAbstractAn easily prepared, well-defined N-heterocyclic carbene-palladium(II) complex was found to be an efficient catalyst for the Suzuki-Miyaura cross-coupling of N-acylsuccinimides with arylboronic acids via C-N bond activation. Under the optimal conditions, all reactions proceeded smoothly generating broad array of diaryl ketones in good to high yields (81->99%) within hours.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Ultrasonic-assisted synthesis, characterization and DNA binding studies of Ru(II) complexes with the chelating N-donor ligand and preparing of RuO2 nanoparticles by the easy method of calcination
Publication date: Available online 1 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Ni-Ni Zhang, Fahime Bigdeli, Qian Miao, Mao-Lin Hu, Ali MorsaliAbstractThe binding of ruthenium(II) complexes of formulation [(η6-p-cymene)RuCl(L1)]PF6 (1) and [(η6-C6H6)RuCl(L1)]PF6 (2), L1= (E)-4-nitro-N-(quinolin-2-ylmethylene)aniline, to calf thymus–DNA (CT-DNA) were investigated via techniques include electronic absorption spectra, fluorescence and redox behavior (cyclic voltammetry) and the results of the analysis of complexes 1 and 2 are compared with the results of complexes 3 and 4, [(η6-p-cymen...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Trinuclear tris(ansa-metallocene) complexes of zirconium and hafnium for olefin polymerization
Publication date: Available online 1 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Lars N. Jende, Aurelien Vantomme, Alexandre Welle, Jean-Michel Brusson, Jean-François Carpentier, Evgueni KirillovAbstractNew platforms for trinuclear complexes, 1,3,5-tris(fluoren-2-yl-R)benzene (Ph{2-FluRH}3; R = H (2a), 6-tBu (2b), 7-tBu (2c), Tet (2d) (Tet = 2,2,5,5-tetramethyl-tetrahydrobenzofluorene), were synthesized via an acid-catalyzed cyclotrimerization of the corresponding substituted 2-acetylfluorenes. Subsequent nucleophilic addition of the [Ph{2-FluR}3]3− trianions onto 6,6,-dimethylful...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Chiral thiazolidines in the enantioselective ethylation of aldehydes: An experimental and computational study
Publication date: Available online 1 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Nélia C.T. Tavares, César T. Neves, Bruce F. Milne, Dina Murtinho, Alberto A.C.C. Pais, M. Elisa Silva SerraAbstractA library of new chiral thiazolidines was prepared starting from l-cysteine and d-penicillamine in a simple, short synthetic sequence. 2-Arylthiazolidines were obtained, as diastereoisomeric mixtures, with good yields and in short reaction times, through a new and greener procedure, using microwave irradiation. Their use as chiral ligands in the enantioselective ethylation of aromatic aldehydes...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Functionalized nitrogen ligands (CN) for palladium catalyzed cross-coupling reactions (part II)
Publication date: Available online 3 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Arjun KumbharAbstractIn recent years, considerable effort has been focused in Pd catalyzed cross-coupling reactions, especially the use of less reactive and economically viable substrates like aryl chlorides. Unfortunately, Pd complexes containing the ligands having only N as a donor atom has some limitations, as it couples, mostly aryl iodides and bromides with different nucleophiles, and shows less activity towards aryl chlorides. This restriction can overwhelm by the use of Pd complexes containing N in combination with...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and reactions of [RhCl(CO){(Ph2P(CH2CH2O)mCH2CH2Ph2-P,P’)}]n (m = 3, 4, 5 n = 1, 2 …) metallacrown crown ethers
Publication date: 1 December 2018Source: Journal of Organometallic Chemistry, Volume 876Author(s): Dale C. Smith, Ethan C. Cagle, Gary M. GrayAbstractThe reactions of [RhCl(cod)]2 and Ph2P(CH2CH2O)nCH2CH2PPh2P (n = 3, 4, 5) under a CO atmosphere yield [RhCl(CO){(Ph2P(CH2CH2O)n CH2CH2Ph2-P,P′)}]m monocarbonyl metallacrown ethers. These complexes are mixtures of cyclic n-mers and monomers with trans coordination geometries at the rhodium. The monocarbonyl rhodium metallacrown ethers reversibly react with CO at atmospheric pressure to form [RhCl(CO)2{(Ph2P(CH2CH2O)nCH2CH2Ph2-P,P′)}]m dicarbonyl metallacrown et...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Synthesis, photo- and electro-luminescence of dinuclear Ir(III) complexes containing bis-β-diketonate carbazole ligand
Publication date: 15 December 2018Source: Journal of Organometallic Chemistry, Volume 877Author(s): Yuling Zhao, Yanmei Li, Tianzhi Yu, Xinyu Li, Xiaoxiao Liu, Youjia Wang, Hui ZhangAbstractA carbazole-functionalized bis-β-diketone as ancillary ligand, 1,1'-(9-(heptan-3-yl)-9H-carbazole-3,6-diyl)bis(4,4,4-trifluorobutane-1,3-dione) (H2L), which contains two trifluorinated alkyl groups, has been prepared for the synthesis of two green and red emitting dinuclear Ir(III) complexes with the general formula Ir2(CˆN)4L [CˆN = 3-(pyridine-2-yl)coumarinato (1L) and 2-(1-naphthyl)benzothiazole (2L)]. The photophy...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

A new class of organocobaloximes based FeNi3/DFNS for reduction of 4-nitrophenol and 2-nitroaniline
This study investigated the potential application of an efficient, easily recoverable, and reusable dendritic fibrous nanosilica (DFNS) magnetic nanoparticle catalyst, which supported cobaloxime complexes and corresponding to positively charged phosphonium linked cobaloximes (FeNi3/DFNS/Cobaloxime/PCPL MNPs) for catalytic reduction of 4-NP and 2-NA. FeNi3/DFNS/Cobaloxime/PCPL MNPs were thoroughly characterized by using TEM, FE-SEM, VSM, TGA, ICP-MS, and BET. Analysis of the recycled catalyst by ICP-MS showed only minor modifications in its morphology after the reaction and thus confirmed the strength of the catalyst.Graphi...
Source: Journal of Organometallic Chemistry - October 5, 2018 Category: Chemistry Source Type: research

Synthesis and architecture of polystyrene-supported Schiff base-palladium complex: Catalytic features and functions in diaryl urea preparation in conjunction with Suzuki-Miyaura cross-coupling reaction by reductive carbonylation
Publication date: Available online 21 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Priyanka Basu, Sk Riyajuddin, Tusar Kanto Dey, Aniruddha Ghosh, Kaushik Ghosh, Sk Manirul IslamAbstractThis work represents an efficient and unique phosphine-free approach for the polystyrene embedded Schiff-base palladium catalyzed diaryl urea synthesis and Suzuki-Miyaura cross-coupling reaction by reductive carbonylation process. The careful instrumental investigations with FE-SEM, EDAX, TGA, UV–Vis, FTIR, AAS, and elemental analysis precisely characterized the developed heterogeneous catalyst. Reaction paramet...
Source: Journal of Organometallic Chemistry - September 22, 2018 Category: Chemistry Source Type: research

Mechanistic insight into the Rh-catalyzed mono- and double-decarbonylation of 1,4-diphenylbut-3-yne-1,2-dione: A computational study
Publication date: Available online 21 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Fanmei Kong, Hui SunAbstractThe reaction mechanisms on the Rh-catalyzed mono- and double-decarbonylation of 1,4-diphenylbut-3-yne-1,2-dione (R) have been computationally investigated by employing density functional theory (DFT) calculations. In reaction A, by using Xantphos as ligand and ethylbenzene as solvent, R could afford monodecarbonylated product (P1) firstly and then transform into doubledecarbonylation ynone (P2) irreversibly, so P2 is the major product. In contrast, in reaction B (by employing dppe as ligand ...
Source: Journal of Organometallic Chemistry - September 22, 2018 Category: Chemistry Source Type: research

Rhenium-catalyzed α-alkylation of enol acetates with alcohols or ethers
Publication date: Available online 20 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Rui Umeda, Yuuki Takahashi, Takaaki Yamamoto, Hideki Iseki, Issey Osaka, Yutaka NishiyamaAbstractWhen alcohols were treated with enol acetate in the presence of a catalytic amount of a rhenium complex, ReBr(CO)5, the carbon-carbon bond formation of the alcohols and enol acetate smoothly proceeded to give the corresponding ketones and aldehyde in moderate to good yields. For the reaction of allylic alcohols, γ,δ-unsaturated carbonyl compounds were obtained in good yields. When ethers were used instead of alc...
Source: Journal of Organometallic Chemistry - September 21, 2018 Category: Chemistry Source Type: research

The role of Si in Ir(SiNN) catalyst and chemoselectivity of dehydrogenative borylation over hydroborylation: A theoretical study
Publication date: Available online 20 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Shuang Chen, Shao-Fei Ni, Pei-Nian Liu, Li DangAbstractAn Ir(SiNN) complex has been reported that efficiently catalyzes dehydrogenative C-H borylation, rather than hydroborylation, of terminal alkynes. Here we performed density functional theory calculations to elucidate the reaction mechanism and attempt to explain the strict chemoselectivity for dehydrogenative borylation. The calculations suggest that the chemoselectivity arises mainly from (1) interaction between Si and the metal hydride, which stabilizes the metal...
Source: Journal of Organometallic Chemistry - September 21, 2018 Category: Chemistry Source Type: research

Synthesis, characterization, and olefin (co)polymerization behavior of unsymmetrical α-diimine palladium complexes containing bulky substituents at 4-position of aniline moieties
Publication date: Available online 20 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Lihua Guo, Yanlan Liu, Wenting Sun, Qing Du, Yuliang Yang, Wenyu Kong, Zhe Liu, Darui ChenAbstractThree novel unsymmetrical α-diimine Pd(II) complexes containing bulky substituents at 4-position of aniline moieties were prepared and characterized. Unfortunately, the introduction of large substituents on para- N-aryl moieties did not slow the exchange between the anti and syn forms for these complexes. These unsymmetrical α-diimine Pd(II) complexes also did not improve thermal stability and broaden molecular...
Source: Journal of Organometallic Chemistry - September 21, 2018 Category: Chemistry Source Type: research

Synthesis of gold organometallics at the nanoscale
We report the synthesis of aryldiazonium tetrachloroaurate(III) salts [X-4-C6H4N≡N]AuCl4 (X = F, Cl, Br, I, CN, NO2) and their mild reduction to covalently functionalized nanoparticles. The synthesis of the salts was carried out by the oxidation of anilines, dissolved in HCl, using sodium nitrite followed by the exchange of the counter anion with [AuCl4]- in water. In another procedure, the anilines were protonated with H[AuCl4] in acetonitrile followed by one-electron oxidation using nitrosonium salt [NO]X (X = BF4−, PF6−). Raman and ATR-FTIR spectroscopy displayed the diazonium νN≡N and...
Source: Journal of Organometallic Chemistry - September 21, 2018 Category: Chemistry Source Type: research

Novel titanium (IV) complexes with 1,2-diolate ligands: Synthesis, structure and catalytic activities in ultra-high molecular weight polyethylene production
Publication date: Available online 21 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Vladislav A. Tuskaev, Svetlana Ch Gagieva, Dmitrii A. Kurmaev, Victor N. Khrustalev, Pavel V. Dorovatovskii, Elena S. Mikhaylik, Evgenii K. Golubev, Mikhail I. Buzin, Sergey V. Zubkevich, Nikolay A. Kolosov, Galina G. Nikiforova, Viktor G. Vasil'ev, Boris M. BulychevAbstractA series of titanium (IV) complexes 3a-f stabilized by 1,2-diolate ligands 2 a-e have been synthesized. Structures of complexes 3d and 3e have been determined by X-ray diffraction. Titanium atoms in these complexes have a distorted square-pyramidal ...
Source: Journal of Organometallic Chemistry - September 21, 2018 Category: Chemistry Source Type: research

Orange red iridium complexes with good electron mobility and mild OLED efficiency roll-off
Publication date: Available online 19 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Yong-Hui Zhou, Dong Jiang, You-Xuan ZhengAbstractTwo iridium(III) complexes with 1-(3,5-bis(trifluoromethyl) pyridin-4-yl)isoquinoline (tntpiq) as main ligand, 2-(5-pyridin-4-yl)-1,3,4-oxadiazol-2-yl)phenol (pop) and 2-(5-pyridin-4-yl)-1,3,4-thiadiazol-2-yl)phenol (psp) as ancillary ligands were investigated. Both complexes emit orange red lights with different photoluminescence efficiencies (Ir(tntpiq)2(pop): λem = 585 nm, Φ = 0.41 and Ir(tntpiq)2(psp): λem = 590 nm, Φ = 0.59)...
Source: Journal of Organometallic Chemistry - September 20, 2018 Category: Chemistry Source Type: research

Photoluminescence and electroluminescence of four orange-red and red organic iridium(III) complexes
Publication date: Available online 19 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Ning Su, You-Xuan ZhengAbstractUsing 1-(4-(trifluoromethyl)phenyl)isoquinoline (tfmpiq) and 4-(4-(trifluoromethyl)phenyl) quinazoline (tfmpqz) as the main ligands and pyrazole pyridine derivatives (mepzpy: 2-(3-methyl-1H-pyrazol-5-yl)pyridine, cf3pzpy: 2-(3-(trifluoromethyl)- 1H-pyrazol-5-yl)pyridine) as the ancillary ligands, four iridium(III) complexes (PIQ-Ir1-me, PIQ-Ir2-cf3, PQZ-Ir3-me and PQZ-Ir4-cf3) were synthesized and investigated. Due to the variation of the ligands, these Ir(III) complexes showed different ...
Source: Journal of Organometallic Chemistry - September 20, 2018 Category: Chemistry Source Type: research

Efficient indenones synthesis via iridium-catalyzed decarboxylative annulation between 2-oxo-2-phenylacetic acids and alkynes
Publication date: Available online 20 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Xiaobo Yu, Shudong Geng, Guanchen Liu, Weijie Guo, Jianhui WangAbstractEfficient iridium-catalyzed decarboxylative annulation reactions between 2-oxo-2-phenylacetic acids and alkyne derivatives has been achieved. [IrCp*Cl2]2 with a (CH3OC6H4)3P ligand, AgSbF6 and Cu(OAc)2 additives was the most efficient catalytic system for this transformation. This reaction is suitable for a broad range of alkynes and 2-oxo-2-phenylacetic acids and a variety of indenone derivatives were obtained in medium to high yields. This work pr...
Source: Journal of Organometallic Chemistry - September 20, 2018 Category: Chemistry Source Type: research

Mechanistic insight into the Rh(III)-catalyzed cascade annulation of ο-ethynylanilines with diazo compounds towards Benzo[a]carbazoles
Publication date: Available online 18 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Weirong Wu, Hua Hou, Baoshan WangAbstractA mechanistic analysis for the reactions of RhIII-catalyzed intermolecular cascade annulation of o-ethynylanilines with diazo compounds has been performed in details using density functional theory (DFT) calculations. It is revealed theoretically that the reaction mechanisms starting from intermediate 6 disagree with those proposed by the experimenters. The rate-determining step of the catalytic cycle is the dinitrogen elimination process with an overall barrier of 31.1 kcal...
Source: Journal of Organometallic Chemistry - September 18, 2018 Category: Chemistry Source Type: research

Asymmetric transfer hydrogenation of acetophenone derivatives using 2-benzyl-tethered ruthenium (II)/TsDPEN complexes bearing η6-(p-OR) (R = H, iPr, Bn, Ph) ligands
We report the preliminary asymmetric transfer hydrogenation (ATH) results on a range of primarily acetophenone derivatives with these new complexes using FA/TEA (5:2) as a reducing agent; the results confirm that these catalysts are capable of reducing the substrates within 48 h with excellent enantioselectivities.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - September 18, 2018 Category: Chemistry Source Type: research

Alkylation versus trans-silylation of N-methyl-N-trimethylsilylacetamide with ambident electrophiles (chloromethyl)fluorosilanes
Publication date: Available online 15 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Nataliya F. Lazareva, Nina N. Chipanina, Larisa P. Oznobikhina, Bagrat A. ShainyanAbstractBifunctional silanes ClCH2SiF3 and ClCH2SiF2Me react with N-trimethylsilyl-N-methylacetamide 1a and its tautomer О-trimethylsilyl-N-methylacetimidate 1b as ambident substrates to give the products of trans-silylation N-{[chloro(difluoro)silyl]methyl}N-methylacetamide 11a and N-{[chloro(fluoro)methylsilyl]methyl}N-methylacetamide 12a with liberation of Me3SiF, as well as the products of alkylation N-methyl-N-[(trifluorosilyl)methy...
Source: Journal of Organometallic Chemistry - September 17, 2018 Category: Chemistry Source Type: research

New dioxido-vanadium(V) complexes containing hydrazone ligands: Syntheses, crystal structure and their catalytic application toward CH bond functionalization
Publication date: Available online 13 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Sunshine D. Kurbah, M. Asthana, Ibanphylla Syiemlieh, Alzelia A. Lywait, M. Longchar, R.A. LalAbstractNew dioxido-vanadium(V) complexes derived from hydrazone ligands have been synthesized in good yield. The complexes were characterized by elemental analysis, IR, UV–Visible and 1H NMR spectroscopies. The structure of both the complexes was established by Single Crystal X-ray crystallography. Complex 1 crystallized in monoclinic P21/n space group, with cell parameters a = 8.3725(5) Å, b = 15.0475(17)...
Source: Journal of Organometallic Chemistry - September 13, 2018 Category: Chemistry Source Type: research

Editorial Board
Publication date: 1 November 2018Source: Journal of Organometallic Chemistry, Volume 874Author(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - September 13, 2018 Category: Chemistry Source Type: research

Graphical abstract TOC
Publication date: 1 November 2018Source: Journal of Organometallic Chemistry, Volume 874Author(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - September 13, 2018 Category: Chemistry Source Type: research

Highly regio- and Stereoselective Diels–Alder Cycloadditions of α-Alkoxyvinyl(ethoxy)carbene complexes with exo-heterocyclic dienes
Publication date: Available online 7 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Alberto Feliciano, M. Inés Flores-Conde, Rosa Padilla, Carlos Espinoza-Hicks, Alejandro Camacho-Dávila, Marvin Rentería, Miguel Angel Vázquez, Joaquín Tamariz, Francisco DelgadoAbstractA comparative study of reactivity and selectivity was carried out between the α-alkoxyvinyl(ethoxy)carbene complexes of group 6 metals (CO)5M = C[C(=CH2)(OR)]OEt [1a–c: M = Cr; 6a–c: M = Mo; 7a–c: M = W; a, R = Et; b, R = n–Pr; c, R = n–Bu] ...
Source: Journal of Organometallic Chemistry - September 7, 2018 Category: Chemistry Source Type: research

Aluminum Complexes Based on Tridentate Amidoalkoxide NNO-Ligands: Synthesis, Structure, and Properties
Publication date: 15 November 2018Source: Journal of Organometallic Chemistry, Volume 875Author(s): Kirill V. Zaitsev, Valeriy S. Cherepakhin, Alexander Zherebker, Alexey Kononikhin, Eugene Nikolaev, Andrei V. ChurakovAbstractA series of novel NNO-type ligands 12a-17a, LH2, R1N(CH2CH2NHTs)CHR2CR3R4OH (R1 = Bn, R3 = R4 = H; R2 = H (12a), R2= (S)-Ph (13a), R2= (S)-Bn (14a), R2= (S)-i-Bu (15a); R1 = R2= (R)-Me, R3 = H, R4= (S)-Ph (16a); R1 = Bn, R2= (S)-i-Bu, R3 = R4 = Ph (17a)) was obtained; the ligands LH2 feature various degree of substitution, steric bulkiness, and chirality. Treatment ...
Source: Journal of Organometallic Chemistry - September 7, 2018 Category: Chemistry Source Type: research

Tetraphenylcyclopentadienyl rhodium complexes in stoichiometric and catalytic CH functionalization
Publication date: Available online 4 September 2018Source: Journal of Organometallic ChemistryAuthor(s): David L. Davies, Charles E. Ellul, Kuldip SinghAbstractThe use of [RhCl2(η-C5Ph4H)]2 for stoichiometric and catalytic CH functionalization has been evaluated. For the substrates studied, CH activation, alkyne insertion and CN reductive elimination are all possible at room temperature, similar to corresponding reactions with [RhCl2(η-C5Me5)]2. The tetraphenylcyclopentadienyl ligand shows promise for controlling regioselectivity in catalytic CH functionalization.Graphical abstract[RhCl2(η-C5Ph4H)]2 undergoes s...
Source: Journal of Organometallic Chemistry - September 6, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and reactions of [RhCl(CO){(PPh2P(CH2CH2O)mCH2CH2Ph2P,P′)}]n (m = 3, 4, 5 n = 1, 2 …) metallacrown crown ethers
Publication date: Available online 4 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Dale C. Smith, Ethan Cagle, Gary M. GrayAbstractThe reactions of [RhCl(cod)]2 and Ph2P(CH2CH2O)nCH2CH2PPh2P (n = 3, 4, 5) under a CO atmosphere yield [RhCl(CO){(Ph2P(CH2CH2O)n CH2CH2Ph2-P,P′)}]m monocarbonyl metallacrown ethers. These complexes are mixtures of cyclic n-mers and monomers with trans coordination geometries at the rhodium. The monocarbonyl rhodium metallacrown ethers reversibly react with CO at atmospheric pressure to form [RhCl(CO)2{(Ph2P(CH2CH2O)nCH2CH2Ph2-P,P′)}]m dicarbonyl metallacrown...
Source: Journal of Organometallic Chemistry - September 6, 2018 Category: Chemistry Source Type: research

Enantioselective catalytic hydrosilylation of propiophenone with a simple combination of a cationic iridium complex and a chiral azolium salt
This study aims to propose a simple procedure for the development of enantioselective hydrosilylation of a ketone using catalytic amounts of [Ir(cod)2]BF4 and chiral azolium salt. Previously, catalytic asymmetric hydrosilylation reactions have used well-defined metal-N-heterocyclic carbene (NHC) complexes. The proposed method offers an important advantage of avoiding preparation of NHC-metal species. Several reaction parameters including the amount of reductant, solvent, catalyst loading, and ligand structure were evaluated. In addition, the investigation of the reaction progress as a function of time revealed that an irid...
Source: Journal of Organometallic Chemistry - September 6, 2018 Category: Chemistry Source Type: research

A highly efficient heterogeneous palladium-catalyzed carbonylative annulation of 2-aminobenzamides with aryl iodides leading to quinazolinones
Publication date: Available online 4 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Shengyong You, Bin Huang, Tao Yan, Mingzhong CaiAbstractThe first heterogeneous carbonylative annulation of 2-aminobenzamides with aryl iodides was achieved in N,N-dimethylformamide (DMF) at 120 °C under 10 bar of carbon monoxide by using an MCM-41-immobilized bidentate phosphine palla-dium(II) complex [MCM-41-2P-Pd(OAc)2] as catalyst and 1,8-diazabicycloundec-7- ene (DBU) as base, yielding a wide variety of quinazolinone derivatives in good to excellent yields. The new heterogeneous palladium catalyst can easil...
Source: Journal of Organometallic Chemistry - September 6, 2018 Category: Chemistry Source Type: research

Ionic η5-Cp-Ruthenium (II) complexes as potential anticancer agents
Publication date: Available online 4 September 2018Source: Journal of Organometallic ChemistryAuthor(s): André Delavault, Frank R. Fronczek, Wu Xu, Radhey S. SrivastavaAbstractIonic organometallic ruthenium(II) complexes, [η5-CpRu(PPh3) (1,10-phenanthroline)]+Cl−1, [η5-CpRu(PPh3) (4,7-dimethyl, 1,10-phenanthroline)]+Cl−2, and [η5-CpRu(PPh3) (1,10-phenanthroline-5-amine)]+Cl−3 have been synthesized and characterized. The molecular structures of the complexes 1 and 2 were confirmed by single-crystal X-ray structure analysis. Cytotoxicity assays demonstrated that these compounds show signi...
Source: Journal of Organometallic Chemistry - September 6, 2018 Category: Chemistry Source Type: research

Ligand-free scandium alkyl and alkoxide complexes for immortal ring-opening polymerization of lactide
Publication date: Available online 3 September 2018Source: Journal of Organometallic ChemistryAuthor(s): Hongyan Xie, Chunji Wu, Dongmei Cui, Yang WangAbstractLigand-free Ln (CH2SiMe3)3 (THF)2 (1: Ln = Sc; 2: Ln = Lu; 3: Ln = Er; 4: Ln = Y) and La(CH2C6H4-o-NMe2)3 (5) are employed as the initiators for ring-opening polymerization (ROP) of rac-lactide (rac-LA). Complex 4 solely is active but uncontrolled, while complex 1 is inert. In presence of excess benzhydrol, complexes 1–5 can promote the ROP of LA smoothly, in which the molecular weight distribution values of the resultant polymer are related to ...
Source: Journal of Organometallic Chemistry - September 4, 2018 Category: Chemistry Source Type: research

Mechanistic insight into the ruthenium-catalyzed cycloaddition of enynes with alkynes: A theoretical study
Publication date: Available online 31 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Ruiqiu Liu, Yunfei Tie, Xiaoyan Zhao, Jinjiao Zhu, Jie Zou, Tao LiuAbstractThe density functional theory (DFT) has been employed to elucidate the mechanisms of ruthenium-catalyzed cycloaddition of enynes with alkynes. The calculated results suggest that there are similar reaction pathways for symmetrical and nonsymmetrical alkynes, including oxidative cyclization, insertion of the alkynes, and reductive elimination, respectively. The oxidative cyclization is calculated to be the rate-determining step. The regioselectivity...
Source: Journal of Organometallic Chemistry - September 1, 2018 Category: Chemistry Source Type: research

Sandwich complexes of iron and ruthenium with the semiconducting aromatic hydrocarbon picene
Publication date: Available online 31 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Andrei M. Shved, Yulia V. Nelyubina, Dmitry S. PerekalinAbstractPentacyclic aromatic hydrocarbon picene C22H14 was synthesized by the improved two-step procedure from 1-naphthaldehyde in ca. 50% total yield. Reaction of picene with ferrocene in the presence of AlCl3 produced the binuclear iron complex [(CpFe)2(C22H14)](PF6)2. Reactions of picene with [Cp*Ru(MeCN)3]PF6 produced mono- or binuclear complexes depending on the concentration and ratio of reactants. The structures of the binuclear iron complex and the mononuclea...
Source: Journal of Organometallic Chemistry - September 1, 2018 Category: Chemistry Source Type: research

Synthesis and characterization of selenium(I/II) and tellurium(IV) derivatives of amino acids
Publication date: Available online 30 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Puspendra Singh, Harkesh B. Singh, Ray J. ButcherAbstractThe direct reaction between Te metal and methyl 2-(2-bromoacetamido)propanoate (27) at room temperature, yields the first exapmple of organotellurium(IV) derivative (MeOC(O)CH(Me)NHCOCH2)2TeBr2 (31). Similarly, reaction of Te with methyl 2-(2-bromoacetamido)acetate (26) and methyl 2-(2-bromoacetamido)-3-phenylpropanoate (28) in presence of NaI in acetone gives MeOC(O)CH2NHCOCH2I (29), MeOC(O)CH(R)NHCOCH2)2TeI2 (R = H (30) and CH2Ph (32). Treatment of 26/27/28 wi...
Source: Journal of Organometallic Chemistry - September 1, 2018 Category: Chemistry Source Type: research

Synthesis, structure, and reactivity of doubly trans-spanning bis(dialkyl selenide) complexes; a new route to diselenamacrocycles via alkene metathesis in metal coordination spheres
Publication date: Available online 31 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Hemant Joshi, Sugam Kharel, Nattamai Bhuvanesh, John A. GladyszAbstractThe reaction of selenium with NaBH4 and Br(CH2)6CH = CH2 (2.0 equiv each) gives the dialkyl selenide Se((CH2)6CH = CH2)2 (91% after workup) which is combined with PtCl2 (0.5 equiv, toluene) to give trans-PtCl2(Se((CH2)6CH = CH2)2)2 (10, 85%). The reaction of 10 and Grubbs' first generation catalyst yields macrocyclic trans-PtCl2(Se((CH2)6CH = CH(CH2)6)2Se) (11, 60%) as a mixture of syn/anti isomers with respect to the selenium lone pair...
Source: Journal of Organometallic Chemistry - September 1, 2018 Category: Chemistry Source Type: research

Aluminum complexes based on NNO-Ligands
Publication date: Available online 29 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Kirill V. Zaitsev, Valeriy S. Cherepakhin, Alexander Zherebker, Alexey Kononikhin, Eugene Nikolaev, Andrei V. ChurakovAbstractA series of novel NNO-type ligands 12a-17a, LH2, R1N(CH2CH2NHTs)CHR2CR3R4OH (R1 = Bn, R3 = R4 = H; R2 = H (12a), R2= (S)-Ph (13a), R2= (S)-Bn (14a), R2= (S)-i-Bu (15a); R1 = R2= (R)-Me, R3 = H, R4= (S)-Ph (16a); R1 = Bn, R2= (S)-i-Bu, R3 = R4 = Ph (17a)) was obtained; the ligands LH2 feature various degree of substitution, steric bulkiness, and chirality. Treatme...
Source: Journal of Organometallic Chemistry - August 30, 2018 Category: Chemistry Source Type: research