Synthesis, structure, and properties of a new bifunctional radical cation salt with ferracarborane anion: (BEDT-TTF)2[8,8A′-Cl2-3,3A′-Fe(1,2-C2B9H10)2]

A new radical cation salt of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) with iron(III) bis(1,2-dicarbollide) 8,8A '-dichloro derivatives, that is (BEDT-TTF)(2)[8,8A '-Cl-2-3,3A '-Fe-(1,2-C2B9H10)(2)], was synthesized. Its electroconducting and magnetic characteristics were studied, molecular and crystal structures were determined. The electroconductivity of crystals at room temperature was sigma(293) 5 Omega(-1) cm(-1), which is close to the corresponding value for the salt of cobalt bis(1,2-dicarbollide) dichloro derivative and is considerably higher than the electroconductivity of a similar salt of unsubstituted iron bis(1,2-dicarbollide). The measurements of magnetic susceptibility at 2-300 K showed that this salt is paramagnetic.