Category: 32993-05-8

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article£¬once mentioned of 32993-05-8, Recommanded Product: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Reactions of furylruthenium complexes with oxygen and trimethylsilyl azide

The reaction of the (alpha-alkoxyfuryl)ruthenium complexes 4 with oxygen opens the five-membered furyl ring to give the addition product [Ru]O 2CCR=CHCO2CH3, (5, [Ru] = Cp(PPh 3)2Ru). Further reactions of 5 with CH3I and with organic acid gave CH3O2CCR=CHCO2CH 3, (6), and HO2CCR=CHCO2CH3, (7), respectively. The reaction of 4 with TMSN3 [TMS = (CH 3)3Si] gives the ruthenium azide [Ru]-N3 and alpha-alkoxyfuran, which is readily hydrolyzed to lactone in acidic medium. Treatment of the cyclopropenylruthenium complex 11b containing a methyl crotonate group with TMSN3 affords the five-membered-ring triazole and [Ru]-CN. In this reaction cleavage of the C=C double bond of the three-membered ring could be caused by consecutive additions of TMSN3 to olefinic carbon atoms of intermediates formed during the reaction. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article£¬once mentioned of 32993-05-8, Recommanded Product: 32993-05-8

Heterotrimetallic M-M?-M? transition metal complexes based on 1,3,5-triethynylbenzene: Synthesis, solid state structure, and electrochemical and UV-vis characterization. EPR analysis of the in Situ generated associated radical cations

The synthesis of a series of complexes with different organometallic building blocks unsymmetrically arranged around the periphery of a 1,3,5-triethynylbenzene core is discussed. They are accessible by diverse consecutive reaction sequences, which allow the introduction of transition metal units such as Fc, [(tBu2bpy)(CO)3Re], [(eta5-C5H5)(Ph3P)2Ru], [(eta5-C5H5)(Ph3P) 2Os], and trans-[(Ph3P)2(Cl)Pt] (Fc = (eta5-C5H5)(eta5-C 5H4)Fe; tBu2bpy = 4,4?-di-tert-butyl-2,2?-bipyridyl). The solid state structures of five complexes have been determined. The electrochemical behavior of the newly synthesized mono-, heterobi-, and heterotrimetallic assemblies have been studied, showing that there is no significant electronic interaction between the respective metal atoms. UV-vis spectroscopic measurements suggest a weak interaction between the appropriate metal atoms. The associated radical cations were in situ generated by stepwise chemical oxidation and characterized by continuous wave electron paramagnetic resonance (EPR) investigations in X-band performed at low temperatures.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Cyclopentadienyl-ruthenium and -osmium chemistry XXXVI. Oligomerisation of phenylacetylide residues on ruthenium. Crystal structures of 2(mu-C8Ph4) and 2

Reactions between RuCl(PPh3)2(eta-C5H5) and AgC2Ph afforded a deep blue binuclear complex, shown by X-ray crystallography to contain a planar tricyclic diruthenadicyclobutadienobenzene system, formed by tetramerisation of phenylacetylide residues at the ruthenium centres.A deep purple complex, isolated in small yield from the same reaction, was similarly shown to contain a diruthenapentacyclic system, formed by an unprecedented oligomerisation of five phenylacetylide units.Related reactions have given <(Ru(C2Ph)(PPh3)2(eta-C5H5)>2Ag> and the divinylidene <2(mu-C4Ph2)>2.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article£¬once mentioned of 32993-05-8, Safety of Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Synthesis and Stereochemical Studies of the Chiral Ruthenium Complexes X> .Crystal Structure of <(S)Ru(eta-C5H5)<(S)dpompyr-PP'>Cl>

A simple procedure for the preparation of <(S)Ru(eta-C5H5)<(S)dpompyr-PP'>H> from is described.The hydride reacts stereospecifically with chloroform or carbon tetrachloride to give <(S)Ru(eta-C5H5)<(S)dpompyr-PP'>Cl> whose structure is reported.The crystals are monoclinic, space group P21 with a = 11.076(2), b = 10.908(2), c = 12.825(3) Angstroem, beta = 92.26(2), and Z = 2.The structure was solved by the heavy-atom method and refined to R = 0.0322 using 2 306 diffractometer data with I > 3?(I).Synthesis of this chloro-complex from and (S)dpompyr proceeds with only modest diastereoselectivity whereas reduction of <(S)Ru(eta-C5H5)<(S)dpompyr-PP'>Cl> using LiAlH4 regenerates 88percent <(S)Ru(eta-C5H5)<(S)dpompyr-PP'>H>.Mechanisms are proposed to explain the observed diastereoselectivities.Circular dichroism and 1H, 13C, and 31P n.m.r. spectra of all new compounds are also reported.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Synthesis and structural characterization of new piano-stool ruthenium(II) complexes bearing 1-butylimidazole heteroaromatic ligand

New cationic ruthenium(II) complexes with the formula [Ru(eta 5-C5H5)(LL)(1-BuIm)] [Z], with (LL) = 2PPh 3 or DPPE, and Z = CF3SO3-, PF 6-, BPh4-, have been synthesized and fully characterized. Spectroscopic and electrochemical studies revealed that the electronic properties of the coordinated 1-butylimidazole were clearly influenced by the nature of the phosphane coligands (LL) and also by the different counter ions. The solid state structures of the six complexes determined by X-ray crystallographic studies, confirmed the expected distorted three-legged piano stool structure. However the geometry of the 1-butylimidazole ligand was found considerably different in all six compounds, being governed by the stereochemistry of the mono and bidentate coligands (PPh3 or DPPE).

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of 32993-05-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article£¬once mentioned of 32993-05-8

Thermal and metal-catalyzed cyclization of 1-substituted 3,5-dien-1-ynes via a [1,7]-hydrogen shift: Development of a tandem aldol condensation- dehydration and aromatization catalysis between 3-en-1-yn-5-al units and cyclic ketones

This work investigates the feasibility of thermal and catalytic cyclization of 6,6-disubstituted 3,5-dien-1-ynes via a 1,7-hydrogen shift. Our strategy began with an understanding of a structural correlation of 3,5-dien-1-ynes with their thermal cyclization efficiency. Thermal cyclization proceeded only with 3,5-dien-1-ynes bearing an electron-withdrawing C(1)-phenyl or C(6)-carbonyl substituent, but the efficiencies were generally low (20-40% yields). On the basis of this structure-activity relationship, we conclude that such a [1,7]-hydrogen shift is characterized by a “protonic” hydrogen shift, which should be catalyzed by pi-alkyne activators. We prepared various 6,6-disubstituted 3,5-dien-1-ynes bearing either a phenyl or a carbonyl group, and we found their thermal cyclizations to be greatly enhanced by RuCl 3, PtCl2, and TpRuPPh3(CH3CN) 2PF6 catalysts to confirm our hypothesis: the C(7)-H acidity of 3,5-dien-1-ynes is crucial for thermal cyclization. To achieve the atom economy, we have developed a tandem aldol condensation-dehydration and aromatization catalysis between cycloalkanones and special 3-en-1-yn-5-als using the weakly acidic catalyst CpRu(PPh3)2Cl, which provided complex 1-indanones and alpha-tetralones with yields exceeding 65% in most cases. The deuterium-labeling experiments reveal two operable pathways for the metal-catalyzed [1,7]-hydrogen shift of 3,5-dien-1-ynes. Formation of alpha-tetralones d4-56 arises from a concerted [1,7]-hydrogen shift, whereas benzene derivative d4-9 proceeds through a proton dissociation and reprotonation process.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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(Acetonitrile-N)(eta 5-cyclopentadienyl)bis(triphenylphosphine-P)ruthenium(II) tetrafluoroborate

The title compound, [Ru(C5H5)(CH3CN){(C6H 5)3P}2]-BF4, crystallizes with C1 local point group symmetry. The Ru-P distances are 2.343 (1) and 2.365 (1) A, and the Ru-N-C angle is 169.8(5).

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Reference of 32993-05-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article£¬once mentioned of 32993-05-8

A new optically pure half-sandwich Cp-Ru diphosphine complex with a chiral metal centre, (S)-Ru(eta5-C5H5)-(EPHOS)Cl {EPHOS is (+)-(1R,2S)-2-[(diphenylphosphino)methylamino]-1-phenylpropyl diphenylphosphinite}

The crystal structure of the compound chloro(eta5-cyclopentadienyl){(1R,2S)-2-[(diphenylphospino) methylamino]-1-phenylpropyl diphenylphosphinite-kappa2P, P?}ruthenium(II), [Ru(C5H5)Cl(C34H33NOP2 ))] was discussed. The pseudo-octahedral complex was found to be chiral and the configuration at the Ru atom was S. The analysis showed that the seven-membered metallacycle adopts a boat-like conformation.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

In an article, published in an article, once mentioned the application of 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II),molecular formula is C41H35ClP2Ru, is a conventional compound. this article was the specific content is as follows.Formula: C41H35ClP2Ru

Transition metal alkynyl complexes by transmetallation from Au(CXiCAr)(PPh3) (Ar = C6H5 or C 6H4Me-4)

Facile acetylide transfer reactions take place between gold(i) complexes Au(CXiCAr)(PPh3) (Ar = C6H5 or C 6H4Me-4) and a variety of representative inorganic and organometallic complexes MXLn (M = metal, X = halide, Ln = supporting ligands) featuring metals from groups 8-11, to afford the corresponding metal-alkynyl complexes M(CXiCR)Ln in modest to good yield. Reaction products have been characterised by spectroscopic methods, and molecular structure determinations are reported for Fe(CXiCC6H 4Me-4)(dppe)Cp, Ru(CXiCC6H4Me-4)(dppe) Cp*, Ru(CXiCC6F5)(eta2-O 2)(PPh3)Cp*, Ir(CXiCC6H 4Me-4)(eta2-O2)(CO)(PPh3) 2, Ni(CXiCC6H4Me-4)(PPh3)Cp and trans-Pt(CXiCAr)2L2 (Ar = C6H5, L = PPh3; Ar = C6H4Me-4, L = PPh3, PMe3). The Royal Society of Chemistry 2009.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Nucleophilic substitution on a Ru-coordinated Cp ring by a carborane anion

The Cp ring in [RuCl(Cp)(PPh3)2] undergoes an apparent nucleophilic attack by the carbanion carb- (Hcarb = 2-Me-1,2-dlcarba-closo-dodecaborane), to give an H-/carb- exchange process, which is favoured by coordination of the hydride to the ruthenium centre.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI