Bonding interaction between Group 10 and 11 metals. Synthesis, structure and properties of [M3(S2CNR2)6M′2]2+(M = Pt or Pd; M′= Ag or Cu; R = Et, Pri, Prn, Bun or C6H11)

Abstract

The mixed-metal complexes [M₃(S₂CNR₂)₆M′₂]²⁺(M = Pt or Pd; M′= Ag or Cu; R = Et, Prⁱ, Prⁿ, Buⁿ or C₆H₁₁) have been prepared quantitatively upon mixing stoichiometric amounts of [M(S₂CNR₂)₂ and Ag⁺ or [Cu(MeCN)₄]⁺ in dichloromethane. The structures of nine of them have been determined and are classified into three types: one polymer and two discrete ion structures. Comparison of the structures indicates the existence of a bonding interaction between M and M′ that is greater for Pt than Pd and for Ag than Cu. The strong bonding interaction between the Pt and Ag atoms is also supported by the ¹⁹⁵Pt–^107,109Ag coupling constant of 194 Hz for [Pt₃(S₂CNBuⁿ₂)₆Ag₂]²⁺.