Tag: M.W:700-800

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, SDS of cas: 32993-05-8

The gold acetylide complex 20 endowed with a biaryl backbone provides opportunities for a study on the formation and fate of gold vinylidenes. Although the formyl group in 20 is not sufficiently electrophilic to get attacked by the acetylide in proximity, its activation with TBSOTf (TBSOTf=tert-butyldimethylsilyl trifluoromethanesulfonate) at low temperature triggered instantaneous formation of a gold vinylidene (21). This metastable species evolved into the cationic gold carbene complex 22 bearing a phenanthrene unit and a hydroxyl group at the aurated center; the recorded data suggest that this product might be better viewed as an acylgold species protonated by triflic acid. The use of [Me3O?BF4] as the activating agent led to formation of the analogous Fischer-type carbene 24, whereas replacement of gold by the [CpRu(PPh3)2]+ fragment allowed the ruthenium vinylidene 27 to be isolated, which closely resembles the proposed gold intermediate 21. The starting gold complex 20, the derived products 22 and 24, as well as vinylidene 27 were characterized by X-ray diffraction.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Computed Properties of C41H35ClP2Ru, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 32993-05-8, in my other articles.

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

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A new ferrocenyl-bisphosphine, 1,1?-bis(dipyrrolylphosphino)ferrocene (dpypf) (1) was synthesized by the reaction of [Fe(C5H4PCl2)2] with lithiated pyrrole at ?78 C. The bis(selenide) [Fe{C5H4P(Se)(NC4H4)2}2] (2) and tetracarbonyl derivatives [M(CO)4(dpypf)] (3, M = Mo; 4, M = W) were synthesized by reacting 1 with elemental selenium and [M(C5H11N)2(CO)4] (M = Mo, W), respectively. The reaction of 1 with [Ru(eta6-p-cymene)Cl2]2in 1:2 molar ratio yielded the dinuclear complex [{Ru(eta6-p-cymene)Cl2}2(mu-dpypf)] (5), whereas the reaction with [CpRu(PPh3)2Cl] in 1:1 molar ratio produced a chelate complex [CpRuCl(dpypf)] (6). The reactions of 1 with M(COD)Cl2(M = Pd, Pt) yielded chelate complexes, [MCl2(dpypf)] (7, M = Pd, 8, M = Pt). Treatment of 1 with AgOTf in 1:1 molar ratio gave a dinuclear complex [Ag(mu-OTf)(dpypf)]2(9). Gold complex [Au2Cl2(mu-dpypf)] (10) was obtained by reacting 1 with two equivalents of [AuCl(SMe2)]. Crystal structures of 2?4 and 6?10 were established by single-crystal X-ray diffraction studies.

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

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, Application In Synthesis of Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

This work reports a novel method for the direct aminophosphonylation of aldehydes catalyzed by cyclopentadienyl ruthenium(II) complexes. The system HP(O)(OEt)2/[CpRu(PPh3)2Cl] was very efficient for the aminophosphonylation of aldehydes with primary and secondary amines, producing the corresponding alpha-aminophosphonates in good to excellent yields. This novel method has several advantages including the use of a small amount of catalyst (0.5 mol%), high chemoselectivity, solvent-free conditions and application of the catalyst [CpRu(PPh3)2Cl] for at least 12 cycles with excellent activity.

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

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A new domino reaction is developed in which a six-membered ring diene is formed in a regio- and stereoselective manner from an ene-yne and an alkene through the mediation of a ruthenium complex.

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

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Transition metal alkynyl complexes containing perfluoroaryl groups have been prepared directly from trimethylsilyl-protected mono- and di-ethynyl perfluoroarenes by simple desilylation/metallation reaction sequences. Reactions between Me3SiCCC6F5 and RuCl(dppe)Cp? [Cp? = Cp, Cp*] in the presence of KF in MeOH give the monoruthenium complexes Ru(CCC6F5)(dppe)Cp? [Cp? = Cp (2); Cp* (3)], which are related to the known compound Ru(CCC6F 5)(PPh3)2Cp (1). Treatment of Me 3SiCCC6F5 with Pt2(mu-dppm) 2Cl2 in the presence of NaOMe in MeOH gave the bis(alkynyl) complex Pt2(mu-dppm)2(CCC6F 5)2 (4). The Pd(0)/Cu(i)-catalysed reactions between Au(CCC6F5)(PPh3) and Mo(?CBr)(CO) 2Tp* [Tp* = hydridotris(3.5-dimethylpyrazoyl)borate], Co3(mu3-CBr)(mu-dppm)(CO)7 or ICCFc [Fc = (eta5-C5H4)FeCp] afford Mo(?CCCC 6F5)(CO)2Tp* (5), Co3(mu 3-CCCC6F5)(mu-dppm)(CO)7 (6) and FcCCCCC6F5 (7), respectively. The diruthenium complexes 1,4-{Cp?(PP)RuCC}2C6F4 [(PP)Cp? = (PPh3)2Cp (8); (dppe)Cp (9); (dppe)Cp* (10)] are prepared from 1,4-(Me3SiCC)2C6F4 in a manner similar to that described for the monoruthenium complexes 1-3. The non-fluorinated complexes 1,4-{Cp?(PP)RuCC}2C6H 4 [(PP)Cp? = (PPh3)2Cp (11); (dppe)Cp (12); (dppe)Cp* (13)], prepared for comparison, are obtained from 1,4-(Me3SiCC)2C6H4. Spectro-electrochemical studies of the ruthenium aryl and arylene alkynyl complexes 2-3 and 8-13, together with DFT-based computational studies on suitable model systems, indicate that perfluorination of the aromatic ring has little effect on the electronic structures of these compounds, and that the frontier orbitals have appreciable diethynylphenylene character. Molecular structure determinations are reported for the fluoroaromatic complexes 1, 2, 3, 6 and 10.

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

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Reactions between RuX(PPh3)2(eta-C5H5) (X = Cl, I) and C2(CO2Me)2 in MeOH in the presence of NH4PF6 have given three types of complex, which have been fully characterised by X-ray studies.These are the eta4-diene complexes RuX(eta-C5H5) (1, X = Cl; 2, X = 1) and the eta5-cyclohexadienyl derivatives Ru(eta5-C5H5) (4) and Ru(CO2Me)6> (5).The three complexes are formed by di-, tri- and tetra-merisation of the alkyne at the mononuclear ruthenium centre; the last reaction is unprecedented.Possible mechanisms are discussed.

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

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Conventional reactions of trans-Ru(CCCCH)2(dppe)2 1 with RuCl(PP)Cp? or AuCl(PPh3) have given the complexes trans-Ru(CCCCR)(CCCCR?)(dppe)2 [R = H, Ru(PP)Cp?, Au(PPh3); R? = Ru(PP)Cp?, (PP)Cp? = (PPh 3)2Cp, (dppe)Cp, (dppe)Cp (not all combinations)]. The Au(PPh3) derivatives react with Co(mu3-CBr)(mu-dppm) (CO)7 to give trans-Ru(CCCCH){CCCCC[Co3(mu-dppm)(CO) 7]}(dppe)2 and trans-Ru{CCCCC[Co3(mu-dppm) (CO)7]}2(dppe)2, which contain respectively four- and five-carbon and two five-carbon chains linking the metal centres. Also described is the addition of tcne to trans-Ru(CCCCH)2(dppe) 2 to give the bis(eta1-tetracyanobutadienyl) complex trans-Ru{CCC[C(CN)2]CHC(CN)2}2(dppe) 2 11, of which the single crystal X-ray structure is reported.

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

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The mononuclear chelated complex [RuCl(Cp)(eta2-dppa)] has been synthesised and reacted with [Rh2Cl2(CO)4] to form the heterobimetallic complex [(Cp)Ru(mu-CO)2{(mu-Ph2PN(H)PPh2}RhCl 2]. Complexes of [RuCl(Cp){(PPh2)2CHCH2PPh2}] have been reacted with [Rh2Cl2(CO)4] or [RhCl(CO)2(p-toluidene)]. Characterisation of these new ruthenium complexes was carried out using 31P-NMR, FAB mass spectroscopy, elemental analysis and IR spectrophotometry.

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

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, name: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

The reaction between primary amines (RNH2) and diaryl diazomethanes (Ar2CN2) in the presence of catalytic amounts of the complex [RuCl(eta5-C5H5)(PPh3) 2] (1), in chloroform at 60C, generally affords mixtures of imines Ar2C=NR as main product and amines Ar2CHNHR. Whereas Ar2CHNHR are formed by the expected carbene insertion into the N-H bond of the substrate, the generation of Ar2C=NR is unprecedented. The carbene intermediate [RuCl(=CAr2)(eta5-C5H5)(PPh 3)] seems to be the key-species involved in the formation of both products.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Product Details of 32993-05-8, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 32993-05-8, in my other articles.

Reference：
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.14564-35-3, Name is Dichlorodicarbonylbis(triphenylphosphine)ruthenium(II), molecular formula is C38H34Cl2O2P2Ru. In a Article，once mentioned of 14564-35-3, Application In Synthesis of Dichlorodicarbonylbis(triphenylphosphine)ruthenium(II)

Upon reaction with [Ru(PPh3)2(CO)2Cl2], N-(naphthyl)-4-R-salicylaldimines (R = OCH3, H, Cl; H2L1-H2L3) and 2-hydroxy-N-(naphthyl)naphthaldimine (H2L4) readily undergo cycloruthenation by C-H bond activation at the peri position to afford complexes of the type [Ru(PPh3)2(L)(CO)] (L = L1-L4). The crystal structures of the [Ru(PPh3)2(L)(CO)] (L = L1, L2, L4) complexes were determined and the structure of [Ru(PPh3)2(L3)(CO)] optimized by DFT calculations. The thermodynamics for the reaction of [Ru(PPh3)2(CO)2Cl2] with H2L2 to give [Ru(PPh3)2(L2)(CO)] were determined. All the complexes show intense absorptions in the visible and UV regions, which have been analyzed by TDDFT calculations. Cyclic voltammetry of the four cycloruthenated complexes showed two oxidations within the range 0.50-1.35 V versus SCE and a reduction at around -1.75 V versus SCE. The [Ru(PPh3)2(L)(CO)] (L = L1-L4) complexes were found to efficiently catalyze the transfer hydrogenation of carbonyl compounds.

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