(η<sup>6</sup>‐Arene)ruthenium(II) Complexes with Hemilabile η<sup>3</sup>‐Dicyclohexylvinylphosphine (DCVP) and η<sup>3</sup>‐Diphenylvinylphosphine (DPVP) Phosphaallyl Ligands: Formation of an Unexpected Trinuclear Complex
作者:John H. Nelson、Kesete Y. Ghebreyessus
DOI:10.1081/sim-120024313
日期:2003.1.10
The complexes [(eta(6)-arene)RuCl2(Cy2PCH=CH2)], [arene=MeC6H5, (1a); p-MeC6H4Me; (2a); p-MeC6H4CHMe2 (3a); 1,2,4,5-Me4C6H2, (4a); and C6Me6, (5a)], have been synthesized by reacting [(eta(6)-arene)RuCl2](2) with dicyclohexylvinylphosphine (DCVP). In the presence of AgPF6, in a 1: 1 dichloromethane/acetone solvent mixture the compound [(eta(6)-C6Me6)RuCl2(Cy2PCH=CH2)] (5a) afforded [(eta(6)-C6Me6)RuCl(eta(3)-DCVP)]PF6 (1b). A similar reaction was conducted with [(eta(6)-C6Me6)RuCl2(Ph2PCH=CH2)] in an attempt to form [(eta(6)-C6Me6)RuCl(eta(3)-DPVP)]PF6 (2b). However, this reaction yielded, instead, the unexpected trinuclear heterobimetallic complex [(eta(6)-C-6-Me-6)Ru(mu-Cl)(2)(Ph2PCH=CH2)}(2)Ag](PF6) (3b) the structure of which was determined by X-ray crystallography. Compound (1b) reacts with phenylisocyanide to form [(eta(6)-C6Me6)RuCl(eta(1)-DCVP)(CNPh)]PF6. The complexes have been characterized by H-1, P-31H-1} and C-13(H-1) NMR spectroscopy, elemental analyses, cyclic voltammetry, and in some cases [compounds (4a), (1b) and (3b)] by X-ray crystallography.