Synthesis, structure, electrical and magnetic properties of (BEDT-TTF)2[3,3′-Fe(1,2-C2B9H11)2

Abstract

New radical cation salt of bis(ethylenedithio)tetrathiafulvalenium and iron bis(dicarbollide) [BEDT-TTF] 2 [3,3′-Fe(1,2-C 2 B 9 H 11 ) 2 ] ( 1 ) has been synthesized. The crystal structure of 1 has been determined by single-crystal X-ray diffraction method found to be isostructural to the known Co and Cr analogues. The electric conductivity measurement in the range of 110 ÷ 296 К shows that 1 is semiconductor with the room temperature conductivity σ 293 = 1.5 × 10 −2 Ω −1 cm −1 , that is higher than in the Cr analogue and lower than in the Co analogue. The measurement of magnetic susceptibility in the range of 2 ÷ 300 K revealed that 1 is paramagnetic with the absence of significant interactions between the organic radical cations and the paramagnetic anions. Radical cation salt of bis-(ethylenedithio)tetrathiafulvalenium and iron bis(dicarbollide) (BEDT-TTF) 2 [3,3′-Fe(1,2-C 2 B 9 H 11 ) 2 ] has been synthesized. Its crystal structure has been determined by single-crystal X-ray diffraction method. Electric and magnetic properties of the radical cation salt were studied. The structure–property relationships in the (BEDT-TTF) 2 [3,3′-M(1,2-C 2 B 9 H 11 ) 2 ] series (M = Cr, Fe, Co) were discussed. ► New radical cation salt of bis(ethylenedithio)tetrathiafulvalenium and iron bis(dicarbollide) has been synthesized. ► The crystal structure of (BEDT-TTF) 2 [3,3′-Fe(1,2-C 2 B 9 H 11 ) 2 ] has been determined by single-crystal X-ray diffraction method. ► Electric and magnetic properties of (BEDT-TTF) 2 [3,3′-Fe(1,2-C 2 B 9 H 11 ) 2 ] were studied. ► The structure–property relationships in the (BEDT-TTF) 2 [3,3′-M(1,2-C 2 B 9 H 11 ) 2 ] series (M = Cr, Fe, Co) were discussed.