Molecular Charge-Transfer Salt of BEDT−TTF [Bis(ethylenedithio)tetrathiafulvalene] with the Oxalate-Bridged Dimeric Anion [Fe₂(C₂O₄)₅]^4-

Abstract

The compound (BEDT−TTF)4·Fe2(C2O4)5 consists of an Fe(III)−Fe(III) oxalate bridged dimer, with a Fe−Fe distance of 5.472 Å interspersed with 4 BEDT−TTF in a “checker board” arrangement. It contains [Fe2(C2O4)5]4- anions and four dimerized BEDT−TTF cations each having an approximate charge of +1. The compound is semiconducting and exhibits short-range antiferromagnetic ordering at low temperature.