| Autor: |
Gritsenko, V. V., D'yachenko, O. A., Shilov, G. V., Lyubovskaya, R. N., Afanas'eva, T. V., Lyubovskii, R. B., Makova, M. K. |
| Zdroj: |
Russian Chemical Bulletin; April 1992, Vol. 41 Issue: 4 p697-703, 7p |
| Abstrakt: |
The electrochemical oxidation of ET [bis(ethylenedithio)tetrathiafulvalene] in bromobenzene (electrolyte Bu4N[HgBr3]) gave the radical-cation salt (ET)8[Hg2Br6·PhBr]2 (1), a new organic metal with a temperature range of 300–125 K. At 125 K a metal—dielectric transition is observed. Crystallographic data for (1):a=19.171(6),b=12.668(4),c=17.777(6) Å, a=118.03(3), ß=89.45(2), ?=101.21(3)°, P $$\overline 1 $$ ,Z=1,dcalc=2.30 g/cm3. The crystal structure of (1) is laminar. In the conducting organic layer the ET radical cations are linked into bands by shortened intermolecular S···S contacts of the “side-to-side” type. The anionic layer consists of centrosymmetric complexes [Hg2Br6·C6H5Br]24-. The Hg1 and Hg2 atoms are characterized by a trigonal configuration of the Hg-Br bond which is built up, on account of secondary Hg···Br interactions, into trigonal-bipyramidal for Hg1 and trigonal-pyramidal (tetrahedral) for Hg2. Interaction between the anionic and cationic layers is effected through Br6...S8 contacts [3.491(7) Å)]. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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