Naphthyl C8-H hydrogen activation and synthesis of organometallic ruthenium complex: Crystal structure of hydride intermediates and catalytic transfer hydrogenation
Publication date: Available online 3 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Manju Bala, Anand Ratnam, Rajan Kumar, Kaushik GhoshAbstractOrganometallic ruthenium(II) complex [Ru(L1C∧N∧N)(PPh3)2(CO)] (1) [where L1H2 is (E)N-((1H-pyrrol-2-yl)methylene)naphthalen-1-amine] [H represents dissociable proton] was synthesized via C-H bond activation using different synthetic strategies. Ruthenium hydrido carbonyl complexes [Ru(L1N∧N)(PPh3)2(CO)H] (2) [where L1H2 is (E)N-((1H-pyrrol-2-yl)methylene)naphthalen-1-amine] and [Ru(L2N∧N)(PPh3)2(CO)H] (3) [where L2H2 is (E)N-((1H-pyrrol-2-yl)meth...
Source: Journal of Organometallic Chemistry - November 3, 2018 Category: Chemistry Source Type: research

Ultrasound-promoted an efficient method for the one-pot synthesis of indeno fused pyrido[2,3-d]pyrimidines catalyzed by H3PW12O40 functionalized chitosan@Co3O4 as a novel and green catalyst
Publication date: Available online 1 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Javad Safari, Mona Tavakoli, Mohammad Ali GhasemzadehAbstractA novel magnetically recoverable nanocomposite including Co3O4/chitosan/H3PW12O40 (Co3O4/CS/PWA) as a heterogeneous catalyst was prepared using a facile synthetic method and characterized by FT-IR, XRD, SEM, VSM and EDX. A simple, efficient and rapid synthesis of indeno[2ʹ,1ʹ:5,6]pyrido[2,3-d]pyrimidines was accomplished in excellent yields via one-pot three-component reaction of 1,3-dimethyl-6-aminouracil, aryl aldehydes and 1,3-indandione in the presence of...
Source: Journal of Organometallic Chemistry - November 2, 2018 Category: Chemistry Source Type: research

New hypercoordinated diorganotin(IV) compounds with dithiocarbamato ligands. Synthesis and structural characterization
Publication date: Available online 1 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Nora Chiorean, Cristina Coza, Alexandra Pop, Anca SilvestruAbstractSeveral homo- and heteroleptic diorganotin(IV) dithiocarbamato halides of type RR'Sn(S2CNR″2)Cl [R = R' = Me, R'' = Me (1), Et (2); R = R' = nBu, R'' = Me (3), Et (4); R = 2-(Me2NCH2)C6H4, R' = Me, R'' = Me (5), Et (6)] and pseudo-halides of type RR'Sn(S2CNR″2)(NCS) [R = R' = Me, R'' = Me (7), Et (8); R = R' = nBu, R'' = Me (9), Et (10); R = 2-(Me2NCH2)C6H4, R' = Me, R'' =...
Source: Journal of Organometallic Chemistry - November 2, 2018 Category: Chemistry Source Type: research

Synthesis of Pd phosphine-imine complexes and their reactivity with base
Publication date: Available online 30 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Kyle M.K. Jackman, Amanda A. Fogh, James M. Stubbs, Johanna M. BlacquiereAbstractTwo phosphine-imine ligands were synthesized in which the heteroatoms were connected by an ethyl (1a) or a propyl (1b) linker. Both ligands were reacted with PdCl(Me)(COD), which gave the square planar complexes PdCl(Me)(κ2-P,N-1a) (2a) and PdCl(Me)(κ2-P,N-1b) (2b). Both complexes were treated with base in pyridine in an effort to prepare phosphine 1-azaallyl complexes of the type Pd(Me)(κ2-P,N-L)(py). Deprotonation of 2a g...
Source: Journal of Organometallic Chemistry - October 31, 2018 Category: Chemistry Source Type: research

Synthesis, characterization, and photophysical properties of cyclometalated N-Heterocyclic carbene Platinum(II) complexes
Publication date: Available online 30 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Francesco Mastrocinque, Craig M. Anderson, Adel M. Elkafas, Isabel V. Ballard, Joseph M. TanskiAbstractThiophene and benzothiophene ligands containing N-heterocyclic carbene (NHC) moieties were used to synthesize five and six-membered Pt(II) metallacycles. Ligand scaffolding was synthesized using two methods. The ligands were synthesized using a coupling reaction, utilizing Cu2O as the catalyst or were synthesized using a nucleophilic substitution reaction. The ligands were then metalated by chelate-assisted C-H activati...
Source: Journal of Organometallic Chemistry - October 30, 2018 Category: Chemistry Source Type: research

Phosphorus-carbon bond forming reactions of iron tetracarbonyl-coordinated phosphenium ions
Publication date: Available online 30 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Ryan C. King, Shrikant Nilewar, Brian T. SterenbergAbstraction of chloride from [Fe(CO)4(PPh2Cl)] (1) in the presence of PPh3 leads to [Fe(CO)4(PPh2(PPh3))][AlCl4] (2), an iron complex of a phosphine-coordinated phosphenium ion. The PPh3 is readily displaced by ferrocene, leading to an electrophilic aromatic substitution reaction, and formation of [Fe(CO)4{PPh2Fc}] (3) (Fc = ferrocenyl). Alternately, chloride abstraction from 1 in the presence of ferrocene leads directly to 3, via a transient phosphenium ion complex....
Source: Journal of Organometallic Chemistry - October 30, 2018 Category: Chemistry Source Type: research

A mechanistic rationale for the outcome of Sonogashira cross-coupling of 9-bromoanthracene and ethynyltrimethylsilane: An unexpected product 4-(9-anthracenyl)-1,3-bis(trimethylsilyl)-3-en-1-yne
Publication date: Available online 30 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Kirill Nikitin, Helge Müller-Bunz, Patrick J. Guiry, Michael J. McGlincheyAbstractThe Sonogashira reaction of 9-bromoanthracene and ethynyltrimethylsilane furnishes not only the anticipated 9-(trimethylsilylethynyl)anthracene and 2-(trimethylsilyl)aceanthrylene but also (E)-4-(9-anthracenyl)-1,3-bis(trimethylsilyl)-but-3-en-1-yne, all in moderate yields. A mechanistic rationale is proposed that invokes the intermediacy of bromo(anthracenyl)bis(triphenylphosphine)palladium(II) that can undergo coupling either directl...
Source: Journal of Organometallic Chemistry - October 30, 2018 Category: Chemistry Source Type: research

One-pot α-ferrocenylalkylation of amines and alcohols with α-ferrocenyl substituted alcohols under neutral conditions
Publication date: Available online 28 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Ekaterina V. Shevaldina, Anastasia D. Shagina, Andrey B. Ponomaryov, Sergey K. MoiseevAbstractOne-pot reaction of FcCH(R)OH with equimolar quantities of BunLi and EtOCOCl followed by an excess of amine produces N-(α-ferrocenylalkyl)amines in up to 98% yields. Nitrogen heteroaryl amines undergo the α-ferrocenylalkylation at the amino group. The α-ferrocenylalkylation of alcohols and phenols (R’OH) leads to a formation of ethers FcCH(R)OR′ in lower yields. The reactions proceed via an intermed...
Source: Journal of Organometallic Chemistry - October 29, 2018 Category: Chemistry Source Type: research

Ligand acidity constants as calculated by density functional theory for PF3 and N-Heterocyclic carbene ligands in hydride complexes of Iron(II)
Publication date: Available online 29 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Molly M.H. Sung, Sofia Jdanova, Robert H. MorrisAbstractThe deprotonation of metal-hydride intermediates is a key step in some catalytic processes, making the pKa of these intermediates a notable characteristic in the design of catalysts. The acid dissociation constant (Ka) in THF can be approximated using the Ligand Acidity Constant (LAC) method which involves adding acidity constants AL for each of the ligands in the conjugate base complex and correcting for its charge and the stability of the hydride complexes. Here d...
Source: Journal of Organometallic Chemistry - October 29, 2018 Category: Chemistry Source Type: research

Novel access to epilupeol through chemoselective hydrogenation of lupenone using platinum-based organotin catalysts
Publication date: Available online 26 October 2018Source: Journal of Organometallic ChemistryAuthor(s): María Julia Castro, Florencia Musso, Emilia Serrano, Virginia Vetere, María Belén FaraoniAbstractCatalytic hydrogenation of terpenes constitutes one of the most interesting reactions in the transformation of natural products. One of the key goals in this synthesis is the selective hydrogenation of the CO bond for obtaining biologically active epimeric alcohols. In the present work, the use of Pt and PtSn catalysts supported on silica was studied as an alternative to the chemoselective hydrogenation o...
Source: Journal of Organometallic Chemistry - October 27, 2018 Category: Chemistry Source Type: research

Biosketch
Publication date: Available online 26 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Wolfgang A. Herrmann (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 27, 2018 Category: Chemistry Source Type: research

Methyl transfer reactivity of pentachloromethylplatinate(IV) anion with a series of N-nucleophiles
Publication date: Available online 26 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Daniel J. Adams, Brian Johns, Andrei N. VedernikovAbstractReactivity of K2[PtIVCH3Cl5] toward a series of substituted N,N-dimethylanilines 1a-1g, N,N-diisopropylaniline 1h and 2,6-substituted pyridines 2a-2b was investigated in 60% (vol.) aqueous acetone solutions. The reactions result in corresponding N-methylammonium or N-methylpyridinium products, 3 or 4, with high selectivity for the substrates 1a-1g and 2b, and follow an overall 2nd order kinetics, 1st order in both the PtIV complex and the amines. The reactivity is...
Source: Journal of Organometallic Chemistry - October 27, 2018 Category: Chemistry Source Type: research

Oxidation kinetics of ferrocene derivatives with dibenzoyl peroxide
Publication date: Available online 27 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Joshua M. Halstead, Refaat Abu-Saleh, Steven M. Schildcrout, John MasnoviAbstractChemical oxidation of ferrocene and related derivatives by dibenzoyl peroxide in acetonitrile solution produces ferrocenium and benzoic acid after acidification. The rate law is first order in oxidant and in reductant. Steric effects and activation parameters are consistent with a rate-controlling outer-sphere single-electron transfer (ET) step, and reorganization energies are obtained using Marcus theory with B3LYP calculations. Energetics,...
Source: Journal of Organometallic Chemistry - October 27, 2018 Category: Chemistry Source Type: research

Chalcogenide-capped triiron clusters [Fe3(CO)9(μ3-E)2], [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] and [Fe3(CO)7(μ3-E)2(μ-dppm)] (E = S, Se) as proton-reduction catalysts
Publication date: Available online 25 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Ahibur Rahaman, Shishir Ghosh, Sucharita Basak-Modi, Ahmed F. Abdel-Magied, Shariff E. Kabir, Matti Haukka, Michael G. Richmond, George Lisensky, Ebbe Nordlander, Graeme HogarthAbstractChalcogenide-capped triiron clusters [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] and [Fe3(CO)7(μ3-E)2(μ-dppm)] (E = S, Se) have been examined as proton-reduction catalysts. Protonation studies show that [Fe3(CO)9(μ3-E)2] are unaffected by strong acids, mono-capped [Fe3(CO)7(μ3-CO)(μ3-E)(μ-dppm)] react with HBF4.Et2O but ...
Source: Journal of Organometallic Chemistry - October 26, 2018 Category: Chemistry Source Type: research

Organometal-catalyzed asymmetric Friedel-Crafts reactions
In this report, we are trying to highlight the applications of various optically pure metal catalysts in the AF-CA as a versatile synthetic strategy in asymmetric synthesis. Metal-catalyzed AF-CA was frequently found as an important and decisive step (steps) for the effective asymmetric synthesis of complex molecules, compounds showing interesting diverse biological activities and especially in the total synthesis of naturally occurring compounds with great and various biological and pharmacological properties.Graphical abstract (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 26, 2018 Category: Chemistry Source Type: research

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: 15 January 2019Source: Journal of Organometallic Chemistry, Volume 879Author(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 complex...
Source: Journal of Organometallic Chemistry - October 26, 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: 15 January 2019Source: Journal of Organometallic Chemistry, Volume 879Author(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 an asym...
Source: Journal of Organometallic Chemistry - October 26, 2018 Category: Chemistry Source Type: research

Preface
Publication date: Available online 24 October 2018Source: Journal of Organometallic ChemistryAuthor(s): (Source: Journal of Organometallic Chemistry)
Source: Journal of Organometallic Chemistry - October 25, 2018 Category: Chemistry Source Type: research

New bioactive ferrocene-substituted heteroleptic copper(I) complex: Synthesis, structural elucidation, DNA interaction, and DFT study
Publication date: Available online 24 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Shumaila Zubair, Faiza Asghar, Amin Badshah, Bhajan Lal, Raja Azadar Hussain, Saira Tabassum, Muhammad Nawaz TahirAbstractIn the present work, a new para-ferrocenylbenzoate copper(I) complex (a4) has been synthesized and characterized by numerous spectroscopic techniques such as: FT-IR, AAS, and CHNS analysis. Moreover, the single-crystal X-ray structure of the compound a4 was also explored. The DNA binding potency was determined by cyclic voltammetry, UV-visible spectroscopy, and viscometry. The redox behavior of the co...
Source: Journal of Organometallic Chemistry - October 25, 2018 Category: Chemistry Source Type: research

Synthesis and reactivity of platinum vinylcarbene complexes prepared from activation of propargyl alcohols
Publication date: Available online 23 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Wenqing Ruan, Chuan Shi, Herman H.Y. Sung, Ian D. Williams, Guochen JiaAbstractPlatinum vinylcarbene complexes are potentially useful for organometallic synthesis and catalysis, but have been rarely studied. This work reports a convenient route to make platinum vinylcarbene complexes. Treatment of [PtCl2(PPh3)]2 with propargyl alcohols HC≡CC(OH)RR’ (RR’ = Ph2, cyclo-C6H10(OH), (iPr)(C≡CTMS) and (H)(Ph)) in the presence of EtOH produced the vinylcarbene complexes trans-PtCl2{ = C(OEt)-CH=CR...
Source: Journal of Organometallic Chemistry - October 24, 2018 Category: Chemistry Source Type: research

A platinum(II)-acetylide-based conjugated polyelectrolyte for hypoxia imaging via ratiometric and time-resolved luminescence microscopy
Publication date: Available online 22 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Guo Li, Tianci Huang, Mingjuan Xie, Xiangxiang Zhang, Qi Yu, Shujuan Liu, Tianshe Yang, Qiang ZhaoAbstractA platinum(II)-acetylide-based conjugated polyelectrolyte has been designed and synthesized by using polyfluorenes as an O2-insensitive fluorophore and Pt(II) complex as an O2-sensitive phosphor, which can generate conjugated polyelectrolyte dots (CPE-Pdots) in the aqueous solution owing to their amphiphilic structures. The CPE-Pdots display good sensitivity to O2 concentration and can detect oxygen levels reversibly...
Source: Journal of Organometallic Chemistry - October 24, 2018 Category: Chemistry Source Type: research

Synthesis, characterization, crystal structures, Hirshfeld surface analysis and theoretical calculations of some new bisphosphoramidate derivatives and novel binuclear Triorganotin(IV) complexes with diphosphoryl Ligand
Publication date: Available online 22 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Khodayar Gholivand, Masoumeh Azadbakht, Yazdan Maghsoud, Mahdieh Hosseini, Canan KazakAbstractA series of new bisphosphoramidate and (thio)phosphoramidate derivatives with the general formula of R1R2P(X)-YP(X)R1R2 have been synthesized and characterized by IR and NMR spectroscopies (L1–L12). The crystal structure of compound 1,4-[(C2H5O)2P(S)(CH2)3NH]2C4H8N2 (L4) is also investigated by X-ray diffraction analysis. Two novel organotin(IV) complexes μ-{1,4-[(C6H5)2P(O)(CH2)3NH]2C4H8N2}[SnR3Cl]2, R3SnCl (R = ph...
Source: Journal of Organometallic Chemistry - October 22, 2018 Category: Chemistry Source Type: research

Cyclometallated platinum(IV) compounds as promising antitumour agents
Publication date: Available online 19 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Margarita CrespoabstractSince the discovery of the anticancer activity of cisplatin by Rosenberg, extensive research has been carried out in order to develop new and more efficient platinum-containing drugs. In recent years, platinum(IV) compounds are appealing due to their inertness and high lipophilicity. On the other hand, interest in organometallic platinum compounds such as cyclometallated platinum(II) compounds is based on their stability and on the fact that the presence of a σ(Pt-C) bond increases the labil...
Source: Journal of Organometallic Chemistry - October 21, 2018 Category: Chemistry Source Type: research

Platinum-catalyzed reactions of 3,4-bis(dimethylsilyl)- and 2,3,4,5-tetrakis(dimethylsilyl)thiophene with alkynes and alkenes
Publication date: Available online 19 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Akinobu Naka, Takashi Mihara, Mitsuo IshikawaAbstractThe reactions of 3,4-bis(dimethylsilyl)thiophene (1) and 2,3,4,5-tetrakis(dimethylsilyl)thiophene (17) with alkynes and alkenes have been reported. The reactions of 1 with alkynes such as diphenylacetylene, 3-hexyne, phenyltrimethylsilylacetylene, and trimethylsilylacetylene, in the presence of a catalytic amount of tetrakis(triphenylphosphine)platinum(0) at 80 °C gave the [1,4]disilino[2,3-c]thiophene derivatives. With alkenes under the same conditions, 1 afford...
Source: Journal of Organometallic Chemistry - October 21, 2018 Category: Chemistry Source Type: research

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 12, 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 8, 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