Silver(i) and thallium(i) cations as unsupported bridges between two metal bases

Abstract

Stirring Lewis-basic transition metal complexes with the salts M[BAr^Cl₄] (M = Ag, Tl; Ar^Cl = 3,5-C₆H₃Cl₂) resulted in the formation of diplatinum complexes [{(Cy₃P)₂Pt}₂(μ-Ag)][BAr^Cl₄] (3) and [{(Cy₃P)₂Pt}₂(μ-Tl)][BAr^Cl₄] (4) and the diiron compound [{(OC)₃(Me₃P)₂Fe}₂(μ-Ag)] (5) featuring bridging, unsupported metal cations. Their properties were investigated by multinuclear NMR spectroscopy, as well as X-ray diffraction and infrared measurements.