The first complex of C-60 fullerene with bis(ethylenedithio)tetrathiafulvalene radical cation: C-60 center dot(BEDT-TTF center dot I-3)

The complex of C-60 fullerene containing the radical cation of the organic donor, viz., C-60.(BEDT-TTF . I-3), where BEDT-TTF is bis(ethylenedithio)te trathiafulvalene, was synthesized for the first time. Single crystals of th e complex were grown in benzonitrile. The crystals of this compound belong to the monoclinic system with a base-centered lattice. The unit cell parame ters are as follows: a = 17.419(6), b = 9.997(4), c = 13.499(1) Angstrom, b eta = 99.00 (1)degrees. The IR and electronic spectra of single crystals of the complex have absorption bands characteristic of the BEDT-TTF.+ radical cation and neutral C-60. The ESR spectrum has a signal with g = 2.0074 and Delta H-pp = 23 G belonging to BEDT-TTF.+. The position of the I3d(5/2) pe ak in the X-ray photoelectron spectrum confirms the formation of the I-3(-) anion.