On the Synthesis and Reactivity of Potassium Phosphinophosphido Dithioformates

Karsten Paul Lüdtke, Axel Schulz, Lilian Sophie Szych

Research article (journal) | Peer reviewed

Abstract

The synthesis of sterically demanding 2,6-bis(2,4,6-trimethylphenyl)phenyl (Ter)-stabilized potassium phosphinophosphido dithioformates 1a–b K[TerP(CS2)PR2] via conversion of the corresponding potassium phosphinophosphides K[TerP–PR2] (R = iPr, tBu) with CS2 is reported. In solution, the dithioformates 1a–b undergo a migration reaction, resulting in the formation of anionic phosphanylthioketones, K[TerPC(=S)–P(S)R2] (2a-b), bearing phosphanylthiolate groups. The cocrystallization of compounds 1a and 2a allows simultaneous structural characterization of both, and the crystallization of 2a from THF or benzene affords specific solvates with solvent-dependent discrete dimers or polymeric chains, respectively.