Dinuclear copper complexes: Coordination of Group 14 heteroborates

Scheel H., Wiederkehr J., Eichele K., Mayer H.A., Winter F., Pöttgen R., Wesemann L.

Abstract

Dicopper(i) complexes with the chelating dmapm ligand [dmapm = 1,1-bis{di(o-N,N-dimetylanilinyl)phosphino}methane] have been synthesized and characterized structurally. Synthesis of the acetonitrile adduct [Cu 2(μ-dmapm)(CH3CN)2][BF4] 2 (1) has been presented and the dicopper electrophile has been used as the starting material in reaction with Group 14 heteroborates. Coordination of the closo-borates at the dicopper moiety resulted in different molecular structures with varying Cu⋯Cu distances. In the case of the side on coordinated stanna-closo-dodecaborate the tin vertex has been characterized by 119Sn Mössbauer spectroscopy and the nucleophilicity at the tin was established in reaction with a molybdenum carbonyl complex. This journal is © the Partner Organisations 2014.