Dalton communications. Neutral PtAg2 clusters containing unsymmetrical µ3-σ and µ-η2,σ alkynyl groups. Crystal structure of [PtAg2(C6F5)2(µ-η2,σ-CCPh)(µ3-σ-CCPh)(PPh3)2]·0.25CH2Cl2

Abstract

The reaction between [{PtAg₂(C₆F₅)₂(CCR)₂}_n] and triphenylphosphine in a molar ratio of 1 : 2 has resulted in a good yield of the trinuclear mixed-metal complexes [PtAg₂(C₆F₅)₂(µ-η²,σ-CCR)(µ₃-σ-CCR)(PPh₃)₂](R = Ph 3 or Bu^t4), and the crystal structure of 3 revealed that they contain two different types of unsymmetrical µ₃-σ and µ-η², σ-edge-bridging alkynyl ligands.