| Autor: |
Bardin, A., Kotov, A., Khasanov, S., Shilov, G., Buravov, L., Ochab, L., Yagubskii, E. |
| Zdroj: |
Russian Journal of Coordination Chemistry; Feb2006, Vol. 32 Issue 2, p82-93, 12p |
| Abstrakt: |
Crystals of a new radical-cation salt (DOEO)4[HgBr4] · TCE ( I) (DOEO = (1,4-dioxanediyl-2,3-dithio)ethylenedioxotetrathiafulvalene, TCE = 1,1,2-trichloroethane) were synthesized by electrocrystallization method at constant current ( i=5×10−6 A/cm2). Crystal structure was studied at room (293 K) and low (30 K) temperatures and was found to consist of the radical-cation layers alternating along the z-axis with tetrahedral HgBr anions and TCE molecules. The anion is disordered over three positions at room and over two positions at low temperatures with occupancy factors 87, 11, 2 and 98, 2%, respectively. The poorly occupied positions of the anion are overlapped with positions of the TCE molecule disordered over two equally occupied positions. The DOEO ethylene groups disordered at 293 K were found ordered at 30 K. The conductivity of I exhibits the following peculiarity: in a temperature interval of 120–140 K, the temperature dependence of resistivity has a pronounced maximum. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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