Alken‐, Alkin‐, Isonitril‐ und Carbonyl‐Komplexe von Kupfer(I) und Silber(1) mit dreizähnigen Sauerstoff‐Chelatliganden

Abstract

Alkene, Alkyne, Isonitrile, and Carbonyl Complexes of Copper(I) and Silver(I) with Tris‐Chelating Oxygen LigandsThe preparation of η2‐alkynecopper(I) complexes of the composition [LRCu(η2‐alkyne)], alkyne = tolan, dimethyl acetylenedicarboxylate, is described. LR are anionic tris‐chelating oxygen ligands of the type [(C5H5)Co{P(O)R2}3]−, R  OMe, OEt, O‐i‐Pr. The isonitrile complexes [LRM(CNt‐Bu)], M  Cu, Ag, have been prepared from [LOMeCu(CO)] and [{AgLOEt}2], respectively, The silver carbonyl complex [LOEt}Ag(CO)] [v(CO)  2147 cm−1] forms in hexane and methanol solutions of [{AgLOEt}2] under 1 atm of CO gas. The olefin complexes [LRCu(ba)], ba = benzytlideneacetone, have been prepared from [Cu(CH3CN)4]PF6, NaLOMe, and ba and from the carbonyl complex [LOEtCu(CO)] and ba. The coordination of the carbon‐carbon double bond of ba at the LRCu fragment does not lead to a 1,4‐addition of methyllithium to the α,β‐unsaturated ketone.