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, name: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)
Reactions of the group 4 metallocene alkyne complexes [Cp 2M(L)(btmsa)] (Cp = eta5-cyclopentadienyl = eta5-C5H5, btmsa = eta2-Me 3SiC2SiMe3; 1: M = Ti, L = none; 2: M = Zr, L = pyridine) and of the [(triphos)CoI] moiety [triphos = 1,1,1-tris(diphenylphosphanylmethyl)ethane] with the benzylsulfanyl-substituted acetylenes PhCH2S-C2-SCH2Ph (3) and PhCH 2S-C2-SFmoc (4) (Fmoc = fluorenylmethoxycarbonyl) have been investigated. Complex 1 reacted with 3 to give a mixture of a violet solid and [Cp2Ti(SCH2Ph)2] (5). Subsequently, the violet solid transformed in toluene at 70 C into the dinuclear complex [(Cp2Ti)2(mu-kappa2-kappa2- BnSC4SBn)] (6) displaying two [Cp2Ti] moieties bridged by a 1,4-bis(benzylsulfanyl)-1,3-butadiyne in the trans configuration. Complex 6 was further degraded in toluene at 100C to the tetranuclear cluster [CpTiS]4 (7). Similar reactivity was deduced indirectly for the reaction partners 1/4 and 2/3. For CoI, the side-on alkyne complexes [(triphos)Co(3)](PF6) (9-PF6) and [(triphos)Co(4)](PF 6) (10-PF6) were obtained. Reductive removal of the benzyl groups in 9-PF6 and subsequent coordination of the [Cp(PPh 3)RuII]+ moiety led to the dinuclear complex [(triphos)Co(mu-eta2-kappa2-C2S 2)RuCp(PPh3)] (13) displaying acetylene dithiolate (acdt2-) in a side-on carbon-sulfur chelate coordination mode. In contrast, the reaction of 10-PF6 with piperidine under very mild conditions resulted in the thio-alkyne complex [(triphos)Co(PhCH 2SC2S)] (11) bearing a terminal sulfur substituent at the coordinated alkyne. However, a subsequent rearrangement reaction led to the CoIII dithiolene complex [(triphos)Co{S2C 2(NC5H10)(CH2Ph)}](PF6) (14-PF6). The intricate rearrangement very likely involves a dinuclear Co species with a eta2-kappa2 coordination of the C2S2 moiety. Sulfur-substituted alkynes show contrasting behaviour in their reactions with TiII and Co I. Whereas the TiII centre in the titanocene eta2-alkyne complex effects a cleavage of the alkyne C sp-S bond concomitant with C-C coupling, CoI in the [Co(triphos)] eta2-alkyne complex leads to loss of the benzyl groups to give either a heterobimetallic Co/Ru acetylene dithiolate complex or a dithiolene complex.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.name: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), you can also check out more blogs about32993-05-8
Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI