Mono‐oxo‐bis‐dithioveratrol‐molybdate – in Solution a Model for Arsenite Oxidase and in the Solid State a Coordination Polymer with Unprecedented Binding Motifs

Abstract

AbstractMono‐oxo‐bis‐dithioveratrol‐molybdate was synthesized, structurally characterized, and investigated with respect to its oxo‐transfer activity. The latter was compared with the activity of the analogous tungsten complex. The title complex is a structural model for molybdopterin bearing arsenite oxidase and both complexes catalyze oxo‐transfer reactions successfully to 100 % conversion. With the dithioveratrol ligand the oxidation of triphenylphosphine proved to be faster for the tungsten complex, which is untypical. The solid‐state structure of the molybdenum complex exhibits an unexpected and very unusual polymeric structural motif consisting of the complex anion mono‐oxo‐bis‐dithioveratrol‐molybdate, sodium cations, and methanol. Infinite double‐decker strands are formed with sodium bridges between the ether functions of two ligands in one strand and the Mo=O moiety of the second strand.