High-pressure NMR study of migratory CO-insertion in palladium–methyl complexes modified with Cs-symmetrical 1,4-diphosphines
摘要:
Carbonylation of the palladium complexes [PdCH3((PP)-P-boolean AND')Cl] ((PP)-P-boolean AND'= 1a, 1b, 1c, 1d, 1e) and [PdCH3((PP)-P-boolean AND')(CH3CN)](OTf) was investigated by means of high-pressure NMR with the determination of the half-life times t(1/2). The results were rationalized on the basis of the electronic properties of the diphosphines and the nature of the solvento ligand in the first coordination sphere. The crystal structures of the complexes [Pd(1b)Cl-2] and [Pd(1b)(H2O)(2)](OTf)(2) are described (1b = 1-(diphenylphosphinomethyl)-2-[bis(3- trifluoromethylphenyl)phosphinomethyl]benzene). (c) 2007 Elsevier B.V. All rights reserved.
Olefin insertion in Pd-acyl complexes modified with 1,4-Cs-symmetrical diphosphine ligands
作者:Antonella Leone、Giambattista Consiglio
DOI:10.1016/j.jorganchem.2006.06.029
日期:2006.10
The insertion of ethene and propene was investigated in palladium(II) acyl complexes of the type [PdC(O)CH3(P∧P′)(CH3CN)](OTf) modified with the Cs-symmetric diphosphines 2–4 and the parent ligand 1, described by C2v-symmetry and taken as a reference.