A new molecular C60 complex with bis(methylenedithio)tetrathiafulvalene (BMDT-TTF): Synthesis, crystal structure, and properties |
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Authors: | N G Spitsina V V Gritsenko O A D’yachenko É B Yagubskii |
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Institution: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia |
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Abstract: | A new molecular C60 complex of the composition (BMDT-TTF) · C60 · 2CS2 (I) with the bis(methylenedithio)tetrathiafulvalene (BMDT-TTF) organic donor is synthesized. The molecular and crystal structures of this complex are determined by x-ray diffraction. The (BMDT-TTF) · C60 · 2CS2 (I) compound crystallizes in a monoclinic crystal system. The main crystal data are as follows: a=13.550(5) Å, b=9.964(7) Å, c=17.125(8) Å, β=99.52(4)°, V=2280(2) Å3, M=1229.45, and space group P21/m. Crystals of I have a layered structure: layers consisting of C60 molecules alternate with layers composed of BMDT-TTF and CS2 molecules. It is found that, in complex I, the donor and C60 molecules are linked through the shortest contacts, which leads to a change in the molecular geometry of BMDT-TTF. The donor molecules in a crystal layer are characterized by the shortest S...S contacts. The IR data indicate the electroneutrality of the fullerene molecule. The electrical conductivity of (BMDT-TTF) · C60 · 2CS2 single crystals is measured using the four-point probe method at room temperature: σRT=2×10?5 Ω?1 cm?1. |
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