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

Synthesis of the labile rhenium(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: 1 November 2018Source: Journal of Organometallic Chemistry, Volume 874Author(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)[κ...
Source: Journal of Organometallic Chemistry - August 30, 2018 Category: Chemistry Source Type: research

Building blocks for oligomeric siloxanes –selective chlorination of hydrido-siloxanes
Publication date: Available online 29 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Thomas Hafner, Ana Torvisco, Frank UhligAbstractA new method was developed to achieve highly selective monochlorination of α,ω-dihydridosiloxanes, ((H)Me2SiO-(SiMe2O)n-SiMe2(H), n = 0–2; (H)R2SiO-SiR2(H); R = Me, iPr, Ph; 3,5-dihydridooctamethyltetrasiloxane, Me3SiO-(Si(H)MeO)2SiMe3) with trichloroisocyanuric acid (TCCA). The dependence of the selectivity of the monochlorination on the siloxane chain length is also discussed.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - August 30, 2018 Category: Chemistry Source Type: research

Magnetic Cu0@HAP@γ-Fe2O3 nanoparticles: An efficient catalyst for one-pot three-component reaction for the synthesis of imidazo[1,2-a]pyridines
Publication date: 15 October 2018Source: Journal of Organometallic Chemistry, Volume 873Author(s): Wei Sun, Wei Jiang, Gan Zhu, Yiqun LiAbstractCu(0) incorporated magnetic hydroxyapatite nanoparticles (Cu0@HAP@γ-Fe2O3 NPs) was conveniently synthesized via the ion exchange reaction, oxidation, and reduction steps. The structure and composition of the nanohybrid were confirmed by FT-IR, SEM, EDS, TEM, XPS, and TGA. The magnetic Cu0@HAP@γ-Fe2O3 hybrid can efficiently catalyzed a one-pot multicomponent synthesis of imidazo[1,2-a]pyridine derivatives from 2-aminopyridine, aldehydes or glyoxylic acids, and alkynes or...
Source: Journal of Organometallic Chemistry - August 30, 2018 Category: Chemistry Source Type: research

Cyclometalation and pentafluorophenyl transfer in protonolysis of a chelating Bis-NHC Platinum(II) complex
Publication date: Available online 27 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Sirous Jamali, Soosan Hosseinmardi, Mehrafshan G. Jafari, Hamidreza SamoueiAbstractThe reactions of the bis-NHC platinum complex cis-[PtMe2(bisNHC1)], 1, in which bisNHC1 = 1,1′-methylene-3,3′-bis[(N-(tert-butyl)imidazole-2-ylidene], with strong acids and thermolysis of the reaction products were investigated. The reaction of 1 with 1 equiv B(C6F5)3 in acetone gave the borate complex cis-PtMe(bisNHC1)[OHB(C6F5)3], 2, that undergoes CH bond activation of one of the tBu wingtips at 50 °C and yields the...
Source: Journal of Organometallic Chemistry - August 29, 2018 Category: Chemistry Source Type: research

1,2 addition or cycloaddition of allenes by a dihafnium μ−Nitrido complex? A DFT study
Publication date: Available online 27 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Pengjie Li, Longfei Li, Xin Yue, Qianyue Wang, Min Pu, Zuoyin Yang, Ming LeiAbstractThe reaction mechanisms of the hydrogenation of [(η5-C5H2-1,2,4-Me3)2Hf]2(NCO) (μ2-N) (1) were studied using density functional theory (DFT) method. The calculated results indicate that the first step is the addition of H2 to the HfN double bond, the second step is the insertion of isocyanate into the bridging metal hydride. The metal centers with a low electronegativity benefits the hydrogenation of 1. Then the reaction mechanisms ...
Source: Journal of Organometallic Chemistry - August 29, 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 - August 29, 2018 Category: Chemistry Source Type: research

Efficient and selective aldehyde cyanosilylation catalyzed by Mg-Li bimetallic complex
Publication date: Available online 24 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Jia Li, Ting Yu, Man Luo, Qian Xiao, Weiwei Yao, Li Xu, Mengtao MaAbstractA NCN-pincer ligand-based Mg-Li bimetallic complex [NCN-MgBr2][Li(THF)4] 1 has been employed as an efficient catalyst for cyanosilylation of a wide range of aldehydes with trimethylsilyl cyanide (TMSCN) at room temperature in CDCl3. In addition, catalyst 1 shows a good tolerance towards various functional groups such as amide, acid, ester, heterocyclic and alkene etc. The chemoselective cyanosilylation of aldehydes over ketones was also achieved und...
Source: Journal of Organometallic Chemistry - August 25, 2018 Category: Chemistry Source Type: research

Trichlorostannyl complexes of Ruthenium(II): Synthesis, structure, reactivity and computational studies
Publication date: Available online 23 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Nuria Álvarez-Pazos, Gabriele Albertin, Stefano Antoniutti, Jorge Bravo, Soledad García-Fontán, J.M. Hermida-Ramón, Gianluigi ZanardoAbstractTrichlorostannyl complexes [Ru(SnCl3) (Cp')L] (2a-c) were prepared by treatment of optically active half-sandwich chlorocomplexes [RuCl(Cp')L] (1a-c) with an excess of SnCl2.2H2O in ethanol. Treatment of trichlorostannyl complexes 2a-c with NaBH4 afforded trihydridostannyl derivatives [Ru(SnH3) (Cp')L] (3a-c) in moderated yields. Treatment of 2a-c with MgB...
Source: Journal of Organometallic Chemistry - August 24, 2018 Category: Chemistry Source Type: research

Preparation of enantiomerically pure derivatives of (3-amino-1,2-dicarba-closo-dodecaboran-1-yl)acetic acid
Publication date: Available online 24 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Dmitry A. Gruzdev, Veronika O. Ustinova, Evgeny N. Chulakov, Valentina A. Ol'shevskaya, Pavel A. Slepukhin, Galina L. Levit, Victor P. Krasnov, Valery N. CharushinAbstractThe enantiomerically pure N- and C-protected derivatives of planar-chiral (3-amino-1,2-dicarba-closo-dodecaboran-1-yl)acetic acid (>99% ee) have first been obtained in good yields via a combination of HPLC separation and synthetic procedures. Assignment of absolute configuration of the carborane fragments has been made based on the X-ray diffraction d...
Source: Journal of Organometallic Chemistry - August 24, 2018 Category: Chemistry Source Type: research

Computational study on the mechanisms of [2+3] and [2+2] cycloisomerization reaction catalyzed by gold complex
Publication date: Available online 23 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Fengyue Zhao, Kang Lv, Tao LiuAbstractThe reaction mechanisms on the gold-catalyzed [2 + 3] and [2 + 2] cycloisomerization reaction have been computationally investigated by employing density functional theory (DFT) calculations. The stepwise addition of an olefin to the gold-allyl species followed by the selectivity-determining cyclization is calculated to be the most favorable mechanism, though this mechanism was considered as infeasible in the experiment. Our calculated results also support the Hamm...
Source: Journal of Organometallic Chemistry - August 23, 2018 Category: Chemistry Source Type: research

Cyclooctadiene iridium complexes [Cp*Ir(COD)X]+ (X = Cl, Br, I): Synthesis and application for oxidative coupling of benzoic acid with alkynes
Publication date: 1 November 2018Source: Journal of Organometallic Chemistry, Volume 874Author(s): Vera P. Datsenko, Yulia V. Nelyubina, Alexander F. Smol'yakov, Dmitry A. LoginovAbstractThe cyclooctadiene iridium complexes [Cp*Ir(COD)X]PF6 ([1a−c]PF6; X = Cl, Br, I) were synthesized by reactions of Cp*Ir(COD) with halogens followed by a counterion exchange. The cyclooctadiene in these complexes is a thermally labile ligand. Complex [1b]PF6 reacts with trimethylphosphite to give [Cp*Ir{P(OMe)3}2Br]PF6 ([2]PF6) as a result of the cyclooctadiene replacement. The refluxing of [1b]PF6 in 1,2-dichloroethane affo...
Source: Journal of Organometallic Chemistry - August 22, 2018 Category: Chemistry Source Type: research

Five-membered zircona- and titanacycloallenes; their diverse reactivity depending upon the position of substituents
Publication date: Available online 16 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Noriyuki Suzuki, Rikako Kurita, Akiko Kawamura, Tomoyuki Ono, Yoshiro MasuyamaAbstractFive-membered metallacycloallene compounds that are 2,5-disubstituted 1-zirconacyclopenta-2,3-dienes were prepared from (E)-1,4-trialkylsilylbut-1-en-3-ynes in good yields. The structures of these compounds were determined by X-ray diffraction study. Contrary to our previous study on 2,4-disubstituted 1-zirconacyclopenta-2,3-dienes, which gave alkynyl alcohols by the reaction with ketones after hydrolysis, the 2,5-bis(trialkylsilyl) comp...
Source: Journal of Organometallic Chemistry - August 17, 2018 Category: Chemistry Source Type: research

Polymer supported palladium complex as a reusable catalyst for Suzuki coupling
Publication date: Available online 16 August 2018Source: Journal of Organometallic ChemistryAuthor(s): M.K. Renuka, V. GayathriAbstractNovel, simple and efficient catalytic system based on a polymer supported Pd complex of 2,6-bis(benzimidazolyl)pyridine, Pd(PS-BBP)Cl2, was found to be highly active for Suzuki–Miyaura cross-coupling of aryl halides with phenylboronic acids under mild conditions. The catalyst was characterized by CHN analyses, thermogravimetric analyses, BET surface area measurements, ICP-OES, FT-IR and electronic spectral studies. The effect of solvent, base, temperature and catalyst concentration on...
Source: Journal of Organometallic Chemistry - August 17, 2018 Category: Chemistry Source Type: research

Cyclooctadiene iridium complexes [Cp*Ir(COD)X]+ (X = Cl, Br, I): Synthesis and application for oxidative coupling of benzoic acid with alkynes
Publication date: Available online 16 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Vera P. Datsenko, Yulia V. Nelyubina, Alexander F. Smol'yakov, Dmitry A. LoginovAbstractThe cyclooctadiene iridium complexes [Cp*Ir(COD)X]PF6 ([1a−c]PF6; X = Cl, Br, I) were synthesized by reactions of Cp*Ir(COD) with halogens followed by a counterion exchange. The cyclooctadiene in these complexes is a thermally labile ligand. Complex [1b]PF6 reacts with trimethylphosphite to give [Cp*Ir{P(OMe)3}2Br]PF6 ([2]PF6) as a result of the cyclooctadiene replacement. The refluxing of [1b]PF6 in 1,2-dichloroethane ...
Source: Journal of Organometallic Chemistry - August 16, 2018 Category: Chemistry Source Type: research

Synthesis and biological activities of carbonyl cobalt CORMs with selectively inhibiting cyclooxygenase-2
Publication date: Available online 15 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Jili Li, Jinlong Zhang, Qiuping Zhang, Zhongjie Bai, Quanyi Zhao, Zhen Wang, Yonglin Chen, Bin LiuAbstractIn this paper, three kinds of hybrid carbonyl cobalt CO-releasing molecules (CORMs), RCOOCH2C2H[Co2(CO)6] (R = NSAIDs-COOH, 1–11; R = celecoxib derivative-COOH, 15), RSO2(R’) CH2C2H[Co2(CO)6] (R = celecoxib, 12; R = nimesulide, 13) and ROCH2C2H[Co2(CO)6] (R = ferulic acid etheyl ester, 14), were synthesized and characterized by IR, NMR and HRMS. The crystal structures of complexes 9, 11...
Source: Journal of Organometallic Chemistry - August 15, 2018 Category: Chemistry Source Type: research

Syndio-specific polymerization of styrene promoted by rare-earth metal bis(aminobenzyl) complexes bearing pyrrolyl-modified arylamide ligands
Publication date: Available online 15 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Chaopan Wang, Min Li, Zehuai Mou, Yunjie LuoAbstractAcid-base reaction of the rare-earth metal tris(o-dimethylaminobenzyl) complexes Ln (CH2C6H4NMe2-o)3 with 1 equiv. of the pyrrolyl-modified arylamide ligands 2,5-Me2C4H2NSiMe2NHC6H4R (R = H, Cl-p, OMe-p) in toluene gave (2,5-Me2C4H2NSiMe2NC6H5)Ln (CH2C6H4NMe2-o)2 (Ln = Sc (1), Y (2), Lu (3)), (2,5-Me2C4H2NSiMe2NC6H4Cl-p)Y(CH2C6H4NMe2-o)2 (4), and (2,5-Me2C4H2NSiMe2NC6H4OMe-p)Y(CH2C6H4NMe2-o)2 (5) in good isolated yields. These complexes were well-characterized by...
Source: Journal of Organometallic Chemistry - August 15, 2018 Category: Chemistry Source Type: research

Application of organometallics in organic synthesis
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Sambasivarao Kotha, Milind MeshramAbstractIn this account, we summarize new synthetic approaches to diverse targets such as α-amino acids, cyclophanes, C3-symmetric molecules, heterocycles, and polycycles by utilizing a variety of organometallic reagents. A wide range of molecules described here are valuable either in material science or in medicinal chemistry. To assemble these molecules, we used boron, chromium, cobalt, indium, molybdenum, palladium, rhodium, ruthenium, silicon, tin, and zinc-based reagents.Graphi...
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

13C NMR spectrum of crystalline [Rh(Acac) (CO)2]: A contribution to the discussion on [Rh(Acac) (CO)2] molecular structure in the solid state
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): YuS. Varshavsky, T.G. Cherkasova, M.R. Galding, A.A. Korlyukov, I.S. Podkorytov, V.A. Gindin, S.N. Smirnov, A.S. Mazur, A.I. RubayloAbstract13C MAS NMR spectrum of polycrystalline [Rh(Acac) (CO)2] (1) displays separate signals from all 7 carbon atoms: 2 doublets from CO ligand carbons along with 5 singlets from Acac carbons. GIPAW calculation of 13C shielding tensor values also revealed non-equivalence of all carbon atoms in molecule 1 in the anisotropic medium of the crystal lattice. Apparently, the C2v symmetry of molec...
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and anticancer activity of novel ferrocene containing quinolinones: 1-Allyl-2-ferrocenyl-2,3-dihydroquinolin-4(1H)-ones and 1-allyl-2-ferrocenylquinolin-4(1H)-ones
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Anka Pejović, Józef Drabowicz, Marcin Cieslak, Julia Kazmierczak-Baranska, Karolina Królewska-GolińskaAbstractA two new series of ferrocene containing quinolinones – 1-allyl-2-ferrocenyl-2,3-dihydroquinolin-4(1H)-ones and 1-allyl-2-ferrocenylquinolin-4(1H)-ones – were prepared and characterized by standard spectroscopic techniques and cyclic voltammetry. The in vitro antitumor activity of all synthesized compounds was investigated against Human Cervix Carcinoma (HeLa), Chronic Myelogenous Leuke...
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

Straightforward microwave-assisted synthesis of organochalcogen amines by reductive amination
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Mara C. Dalmolin, Pamela T. Bandeira, Matheus S. Ferri, Alfredo R.M. de Oliveira, Leandro PiovanAbstractOrganoselenium and organotellurium amines have been shown to present a broad range of interesting properties for both synthetic and biological applications. Despite the current interest in this class of compounds, only few methods to access organochalcogen amines are described in literature, most which involve restrictive conditions associated with displacement reaction, metal-assisted reactions or enzymatic approach. I...
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

New boron reagents for cycloboration of α-olefins into boriranes under Cp2TiCl2 catalysis
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Liliya I. Khusainova, Leila O. Khafizova, Tatyana V. Tyumkina, Kirill S. Ryazanov, Natalya R. Popodko, Usein M. DzhemilevAbstractThe one-pot cycloboration of α-olefins (oct-1-ene, dec-1-ene) for a facile access to substituted boriranes has been carried out with the use of alkyl, arylalkyl, and cycloalkyl boron dichlorides (EtBCl2, n-PentBCl2, n-HexBCl2, Ph(CH2)2BCl2, cyclo-OctBCl2, 2-norbornylBCl2) under Cp2TiCl2 catalysis.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

Chemoselective transfer hydrogenation of nitroarenes, ketones and aldehydes using acylthiourea based Ru(II) (p-cymene) complexes as pre-catalysts
Publication date: Available online 11 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Pushpanathan N. Sathishkumar, Neethi Raveendran, Nattamai S.P. Bhuvanesh, Ramasamy KarvembuAbstractA new series of Ru(II) (η6-p-cymene) complexes (1–5) was synthesized from pyridine based acylthiourea ligands (L1-L5) and [Ru (η6-p-cymene)Cl2]2. All the ligands and complexes were well characterized by UV–Visible, FT-IR, mass and 1H & 13C NMR spectroscopic techniques. The molecular structures of the ligands (L1, L2, L4, L5) and complex 1 were confirmed using single crystal X-ray diffraction study. Th...
Source: Journal of Organometallic Chemistry - August 12, 2018 Category: Chemistry Source Type: research

Ruthenium(II) diphosphine(phosphine)/imine/amine/CO complexes as efficient catalysts in transfer hydrogenation of ketones
Publication date: Available online 7 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Sai Ge, Jin Zhang, Jianguo Zhao, Imran Ulhaq, Guibin Ma, Robert McDonaldAbstractTreatment of [RuCl2(CO)2]n with different phosphine ligands, four Ru(II) complexes of cis-, cis-, trans- RuCl2(CO)2L2 (L = PH(C6H11)2 (1), PPh3 (2), PPh2(C6F5) (3) and PMe3 (4)), in which 1 and 3 are novel complexes, have been generated in methyl chloride and isolated as pure compound in solid. In CH2Cl2 mixed 1:1 M ratio of RuCl2(PP3)3 and 1,1′-bis(diphenylphosphine)ferrocene (DPPF), and further reacted with quantitative 2-aminopyr...
Source: Journal of Organometallic Chemistry - August 7, 2018 Category: Chemistry Source Type: research

Synthesis of some new Methoxy Bridged Benzimidazolyl-Substituted phthalocyanines as potent inhibitors of urease
In this study, the novel peripherally 4-[(2-methyl-1H-benzimidazol-1-yl)methoxy] substituted Zn(II) (3) Cu(II) (4), Co(II) (5) phthalocyanines were prepared and their structures were characterized spectroscopically. The light absorption behaviors of the synthesized compounds (3–6) were studied by UV–Vis spectroscopy in the different concentration and different solvents were studied also. In addition, the urease inhibition activities of the synthesized compounds were also investigated. Among the synthesized molecules, compound 5 showed the best inhibitory effect against jack bean urease with IC50 values of 0.003...
Source: Journal of Organometallic Chemistry - August 6, 2018 Category: Chemistry Source Type: research

Facile one-pot synthesis of tin selenide nanostructures using diorganotin bis(5-methyl-2-pyridylselenolates)
Publication date: Available online 4 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Adish Tyagi, Gourab Karmakar, Amey Wadawale, Alpa Y. Shah, G. Kedarnath, A.P. Srivastava, Vishal Singh, Vimal K. JainAbstractTin selenide (SnSe and SnSe2) nanostructures have been synthesized by a one-pot reaction involving thermolysis of diorganotinbis (5-methyl-2-pyridyl selenolates), [R2Sn{SeC5H3(Me-5)N}2] (R = tBu (1), Et (2) or Me (3)) in a high boiling coordinating solvent. The latter have been isolated by treatment of R2SnCl2 with sodium 5-methyl-2-pyridyl selenolate. They were characterized by elemental analysi...
Source: Journal of Organometallic Chemistry - August 5, 2018 Category: Chemistry Source Type: research

N-heterocyclic carbene-Pd(II) complex based on theophylline supported on Fe3O4@SiO2 nanoparticles: Highly active, durable and magnetically separable catalyst for green Suzuki-Miyaura and Sonogashira-Hagihara coupling reactions
Publication date: Available online 4 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Mohsen Esmaeilpour, Ali Reza Sardarian, Habib FirouzabadiAbstractIn this paper, a novel heterogeneous palladium catalyst was synthesized by anchoring N-heterocyclic carbene-Pd(II) complex based on theophylline on magnetic Fe3O4@SiO2 nanoparticles. The synthesized magnetic composite was characterized by fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA), vibration sample magnetometry (VSM),...
Source: Journal of Organometallic Chemistry - August 5, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and electrochemical properties of two isomers of diiron diselenolato complexes and a new pathway to the μ4-Se twin cluster
Publication date: Available online 4 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Shuang Lü, Ru-Fen Zhang, Qian-Li Li, Jiao He, Yu-Long LiAbstractTwo isomers of diiron diselenolato complexes (ea)-(p-tBuPhSe)2Fe2(CO)6 (1), (ee)-(p-tBuPhSe)2Fe2(CO)6 (2) have been synthesized by treatment of (p-tBuPhSe)2 with Fe3(CO)12 at ambient temperature in 2 h. Moreover, a tetranuclear cluster complex [(μ-tBuPhSe)Fe2(CO)6]2 (μ4-Se) (3) was isolated by this simple and convenient way in 14% yield. All the three complexes were characterized by elemental analysis, FT-IR, NMR (1H, 13C) spectroscopy, as well ...
Source: Journal of Organometallic Chemistry - August 5, 2018 Category: Chemistry Source Type: research

Synthesis, characterization and aggregation properties of non-peripherally (1R,2R)-1,2-di(naphthalen-1-yl)ethane-1,2-diol substituted optically active zinc phthalocyanine and its catalytic application in enantioselective ethylation of aldehydes
Publication date: Available online 3 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Yaşar Gök, Halil Zeki Gök, İlker Ümit KarayiğitAbstractThe novel optically active zinc(II) phthalocyanine having four (1R,2R)-1,2-di(naphthalen-1-yl)ethane-1,2-diol 1 at non-peripheral positions has been synthesized in a condensation using optically active phthalonitrile 2, and characterized by 1H NMR, IR, UV–Vis, Circular Dichroism (CD) and HRMS-TOF spectral data. The spectral and aggregation properties of novel optically active zinc(II) phthalocyanine 3 were investigated. The aggregation behavio...
Source: Journal of Organometallic Chemistry - August 4, 2018 Category: Chemistry Source Type: research

Triphenylantimony(V) 6-alkoxymethyl-3,5-di-tert-butylcatecholates. Structure and redox-properties
Publication date: Available online 3 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Andrey I. Poddel'sky, Tatyana V. Astaf'eva, Ivan V. Smolyaninov, Maxim A. Arsenyev, Georgy K. Fukin, Nadezhda T. Berberova, Vladimir K. Cherkasov, Gleb A. AbakumovAbstractA number of mononuclear triphenylantimony(V) 3,5-di-tert-butylcatecholates of the type (6-AlkOCH2-3,5-DBCat)SbPh3 functionalized with alkoxymethyl group in the 6th position of aromatic ring in catecholato ligand, where Alk = Me (1), Et (2), iPr (3), tBu (4), n-Hexyl (5), and binuclear bis-catecholate Ph3Sb(3,5-DBCat-CH2OCH2-3,5-DBCat)SbPh3 (6) have be...
Source: Journal of Organometallic Chemistry - August 4, 2018 Category: Chemistry Source Type: research

Linear polystyrene-stabilized Rh(III) nanoparticles for oxidative coupling of arylboronic acids with alkenes in water
Publication date: Available online 3 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Atsushi Ohtaka, Shiho Fukui, Akira Sakon, Go Hamasaka, Yasuhiro Uozumi, Tsutomu Shinagawa, Osamu Shimomura, Ryôki NomuraAbstractLinear polystyrene-stabilized Rh(III) nanoparticles (PS-Rh(III)NPs) were obtained when an aqueous solution of RhCl3 was stirred at 90 °C in the presence of KOH, 4-methylphenylboronic acid, and linear polystyrene, as indicated by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). PS-Rh(III)NPs exhibited high catalytic activity for the oxidative coupling o...
Source: Journal of Organometallic Chemistry - August 4, 2018 Category: Chemistry Source Type: research

Magnetic Cu0@HAP@γ-Fe2O3 nanoparticles: An efficient catalysts for one-pot three-component reactions for the synthesis of imidazo[1,2-a]pyridines
Publication date: Available online 2 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Wei Sun, Wei Jiang, Gan Zhu, Yiqun LiAbstractCu(0) incorporated magnetic hydroxyapatite nanoparticles (Cu0@HAP@γ-Fe2O3 NPs) was conveniently synthesized via the ion exchange reaction, oxidation, and reduction steps. The structure and composition of the nanohybrid were confirmed by FT-IR, SEM, EDS, TEM, XPS, and TGA. The magnetic Cu0@HAP@γ-Fe2O3 hybrid can efficiently catalyzed a one-pot multicomponent synthesis of imidazo[1,2-a]pyridine derivatives from 2-aminopyridine, aldehyde or glyoxylic acid, and phenylace...
Source: Journal of Organometallic Chemistry - August 2, 2018 Category: Chemistry Source Type: research

Stepwise trimethylsilyl and trimethylgermyl substitutions at tetraborylmethane
Publication date: Available online 2 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Zachary J. Baum, Jingtao Zhang, Rick A.L. Morasse, Joshua E. GoldbergerAbstractIn exploring the suitability of tetraborylmethane precursors as C4− synthons, we have studied the limits of stepwise trimethylsilyl and trimethylgermyl substitutions on tetrakis (1,3-propanediolatoboryl)methane. In contrast to previous reports indicating minimal silylation of tetraborylmethanes, we have shown that organolithium-mediated deborylation-metalation methodologies readily proceed for up to two substitutions. This enables the synt...
Source: Journal of Organometallic Chemistry - August 2, 2018 Category: Chemistry Source Type: research

Hydrogenation of alkenes and alkynes catalysed by NˆO (imino)phenol palladium(II) complexes: Structural, kinetics and chemoselectivity studies
Publication date: Available online 1 August 2018Source: Journal of Organometallic ChemistryAuthor(s): Thandeka A. Tshabalala, Stephen O. OjwachAbstractReactions of 2-(2-methoxyethylimino)ethyl)phenol (HL1), 2-(2-hydroxyethylimino)ethyl)phenol (HL2), 2-(2-aminoethylimino)ethyl)phenol (HL3) and 2-(2-hydroxyethylimino)methyl)phenol (HL4) with [PdCl2(COD)] afforded the neutral palladium complexes [PdCl2(HL1)] (1), [PdCl2(HL2)] (2), [PdCl2(HL3)] (3), [PdCl2(HL4)] (4) respectively. Treatment of complex 1 with PPh3 gave the cationic complex [Pd(HL1)ClPPh3]+ (5), while reactions of 4 with Pd(OAc)2, in the presence of PPh3 and p-Ts...
Source: Journal of Organometallic Chemistry - August 2, 2018 Category: Chemistry Source Type: research