Synthesis, Structure and Physical-Properties of the Molecular Magnetic Semiconductor (BEDT-TTF)(4)Kfe(C2O4)(3).C6H5Cn (BEDT-Ttf=bis(Ethylenedithio)Tetrathiafulvalene)

Graham AW; Kurmoo M; Day P; Coles SJ; Hursthouse MB; Coomber AT; Friend RH

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.273, 35-40, 1995

DOI10.1080/10587259508031839 Export Citation

Synthesis, Structure and Physical-Properties of the Molecular Magnetic Semiconductor (BEDT-TTF)(4)Kfe(C2O4)(3).C6H5Cn (BEDT-Ttf=bis(Ethylenedithio)Tetrathiafulvalene)

Graham AW, Kurmoo M, Day P, Coles SJ, Hursthouse MB, Coomber AT, Friend RH

We report the synthesis and physical properties of compounds of BEDT-TTF with transition metal tris-oxalate anions. The crystal structure of one such compound, (BEDT-TTF)(4)KFe(C2O4)(3).C6H5CN (1) has been determined. The structure consists of alternating layers of BEDT-TTF and a hexagonal network of K+ and Fe(C2O4)(3)(3-). This material is a semiconductor with an activation energy of 0.14 eV. Magnetic data obey the Curie-Weiss law with C = 4.44 (S=5/2) and theta = -0.25K.