Stepwise synthesis of trimetallic dithiophosphinato clusters containing a cubane-type Mo 2WCuS 4 cluster core

Abstract

Starting from Mo(CO) 6 and disulfanes R 2P(S)-S-S-P(S)R 2 the “trimetallic” tetranuclear clusters Mo 2WCuS 4I(R 2PS 2) 4 3 (R = Et ( a), Pr ( b)) were obtained via the dinuclear compounds Mo 2S 4(R 2PS 2) 2 1 and the trinuclear complexes Mo 2WS 4(R 2PS 2) 4 2. The crystal structure of 3b shows a cubane-type core Mo 2WCuS 4. Both Mo atoms and the W atom are chelated by a dithiophosphinato ligand. One Mo and the W atom are bridged by the fourth ligand. The coordination of W and Mo2 is octahedral, of Mo1 trigonal bipyramidal, and of Cu tetrahedral.