New Organic Conductors with Halogen and Phenyl Substituted Cobalt Bis(dicarbollide) Anions

Kazheva, O.N.; Alexandrov, G.G.; Kravchenko, A.V.; Sivaev, I.B.; Starodub, V.A.; Kosenko, I.D.; Lobanova, I.A.; Bregadze, V.I.; Buravov, L.I.; Dyachenko, O.A.

Авторы: Kazheva Olga N., Alexandrov Grigorii G., Kravchenko Andrey V., Sivaev Igor B., Starodub Vladimir A., Kosenko Irina D., Lobanova Irina A., Bregadze Vladimir I., Buravov Lev I., Dyachenko Oleg A.
Журнал: Journal of Chemical Engineering and Chemistry Research
Том: 2
Номер: 2
Год издания: 2015
Первая страница: 497
Последняя страница: 503
Аннотация: Continuing our recent works towards molecular conductors containing metallacarborane anions with the aim to study the effect of the anion structure on radical cation packing in these compounds we synthesized new radical cation salts based on organic .pi.-donors, BEDT-TTF and TMTTF, with halogen and phenyl derivatives of cobalt bis(dicarbollide) anion: (BEDT-TTF)[8-I-8’-Ph-3,3’-Co(1,2-C2B9H10)2]x0.5(C2H3Cl3) (1) and (TMTTF)[8,8’-Cl2-3,3’-Co(1,2-C2B9H10)2]2 (2). Their crystal structures were determined by X-ray single crystal analysis, electric conductivities were measured using standard dc-four-probe technique. Both compounds possess non-layered architectures and proved to be semiconductors at room temperature. Low values of electric conductivity well agree with the absence of layered or stacked crystal structures, typical for organic conductors. Unlike known BEDT-TTF salts, the [8,8’-Cl2-3,3’-Co (1,2-C2B9H10)2]- anion in 2 adopts gauche conformation, that can be explained by the large gain in the crystal packing energy on the transoid-gauche transformation in comparison with the energy of intramolecular hydrogen bonds in the transoid conformation. We believe that this fact might be the reason for the formation of mixed donor and anion packing in the crystal structures of the salts.
Добавил в систему: Сиваев Игорь Борисович

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New Organic Conductors with Halogen and Phenyl Substituted Cobalt Bis(dicarbollide) Anionsстатья

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