New molecular conductors on the base of 8,8’-dibromo cobalt bis(dicarbollide) anion,
(BEDT-TTF)2[8,8’-Br2-3,3’-Co(1,2-C2B9H10)2] (1), and
(BEDT-TTF)[8,8’-Br2-3,3’-Co(1,2-C2B9H10)2] (2) were synthesized and their crystal
structures and electrical conductivities were determined. Both radical cation salts prepared were
found to be semiconductors. The introduction of two bromine atoms in the cobalt
bis(dicarbollide) anion produces a strong effect on crystal structure and electrical conductivity of
the prepared materials.