Molecular charge-transfer salt of BEDT-TTF [bis(ethylenedithio)tetrathiafulvalene] with the oxalate-bridged dimeric anion [Fe2(C2O4)5]4-

The compound (BEDT-TTF)(4). Fe-2(C2O4)(5) consists of an Fe-(III)-F-(III) oxalate bridged dimer, with a Fe-Fe distance of 5.472 Angstrom interspersed with 4 BEDT-TTF in a checkerboard arrangement It contains [Fe-2(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.