Synthesis of heteropolynuclear complexes with 1,1,1-tris(diphenylphosphinomethyl)ethane. Crystal structure of [(OC)4Mo{(Ph2PCH2)2CMe(CH2PPh2)}AuCl]
摘要:
Treatment of [M(CO)(4){(Ph(2)PCH(2))(2)CMe(CH(2)PPh(2))}] (M = Mo or W) with neutral or cationic gold-(I) or -(III) derivatives afforded bi- or tri-nuclear complexes containing the triphosphine (Ph(2)PCH(2))(3)CMe (tdppme) acting as a mu-P,P',P '' ligand, a co-ordination mode poorly represented thus far. The binuclear derivative [(OC)(4)Mo(tdppme)AuCl] further reacts with 1 equivalent of Tl(acac) (acac = acetylacetonate) to afford [(OC)(4)Mo(tdppme)Au(acac)]. This complex acts as a deprotonating agent in reactions with various starting materials containing phosphines such as (Ph(2)P)(2)CH2 or (Ph(2)P)(3)CH, leading to the formation of trinuclear methanide complexes. The crystal structure of [(OC)(4)Mo(tdppme)AuCl] has been established by X-ray crystallography.