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. 224311-51-7, Name is 2-(Di-tert-Butylphosphino)biphenyl, molecular formula is C20H27P. In a Article£¬once mentioned of 224311-51-7, COA of Formula: C20H27P
Catalytic properties of Ru-eta6-C6H6-diphosphine complexes for hydrogenation of benzene in aqueous-organic biphasic system
The influences of pH on the catalytic properties of Ru-eta6-C6H6-diphosphine complex [RuCl(eta6-C6H6)(BISBI)]Cl (1) (BISBI = 2,2?-bis(diphenylphosphinomethyl)-1,1?-biphenyl), [RuCl(eta6-C6H6)(BDPX)]Cl (2) (BDPX = 1,2-bis(diphenylphosphinomethyl)benzene), Ru2Cl4(eta6-C6H6)2(mu2-BDNA) (3) (BDNA = 1,8-bis(diphenylphosphinomethyl)naphthalene), [RuCl(eta6-C6H6)(BISBI)]BF4 (4), [RuCl(eta6-C6H6)(BDPX)]BF4 (5), and [(eta6-C6H6)2Ru2Cl2(mu2-Cl)(mu2-BDNA)]BF4 (6) for the hydrogenation of benzene were investigated in aqueous-organic biphasic system. The hydrogenation of benzene catalyzed by all complexes yielded only cyclohexane. The catalytic results revealed that the stabilities of these complexes were not only closely relative with their compositions or molecular structures but also the pH value of aqueous solution. Complexes 1 and 2 were homogeneous catalysts at pH <5, but complexes 3, 4, 5 and 6 were partly decomposed in the same reaction conditions and played simultaneously the roles of homogeneous and heterogeneous catalysts. When the pH was up to 12, all of six complexes were gradually decomposed to Ru(0) particles. The addition of extra phosphine ligand was favorable to prevent these complexes from decomposing in the catalytic process. The experiment of mercury poisoning and the curve of conversion vs time strongly supported above conclusions. Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.COA of Formula: C20H27P, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 224311-51-7, in my other articles.
Reference£º
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate