Limits of direct transmetalation of polynuclear copper(II) complexes with M(NS).eta. reagents. Scissor transmetalators. Synthesis and properties of the trimers (.mu.3-O)(N,py)3Cu3X4 (N = N,N-diethylnicotinamide; py = pyridine; X = Cl, Br)

Abstract

Preparation et caracterisation des complexes du type (μ 3 -O)(N,py) 3 Cu 3 − x M x X 4 , x=0-2, M=Co,Zn: spectrometrie RPE et IR. Reactivite des complexes tetranucleaires (μ 3 -O)(N,py) 4 Cu 4 Cl 6 vis-a-vis de M(NS) n , M=Co, Ni, Zn, Cd, Hg, ou Sn; NS=derive de l'acide dithiocarbohydrazonique