Tribromide Salts of the Organic Donor Tetra(methylthio)tetrathiafulvalene, [TTM-TTF]+(Br3 -) and [TTM-TTF]2+(Br3 -)2
Open Access
- 1 November 1986
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 41 (11) , 1437-1442
- https://doi.org/10.1515/znb-1986-1119
Abstract
The 1:1 and 1:2 phases (TTM -TTF)Br3 and (TTM -TTF)(Br3)2, TTM -TTF = tetra(methylthio)tetrathiafulvalene, C10H12S8, have been crystallized by diffusion of bromine vapour into solutions of the donor. The 1:1 salt is monoclinic, P 21/n, a = 7.587(2), b = 11.424(3), c = 23.145(8) Å , β = 95.80(3)°, V = 1997 Å3, Z = 4, Mr = 628.45, dc = 2.09 g cm-3, final Rw = 0.028 for 912 reflections. The 1:2 salt is monoclinic, C2/m, a = 11.510(3), b = 17.039(4), c = 9.770(3), β = 141.62(1)°, V = 1190 Å3, Z = 2, Mr = 868.16, dc = 2.42 g cm-3, final Rw = 0.029 for 899 reflections. Diadic stacks of the monopositive donor cations are found in the 1:1 salt, whereas the dipositive cations in the 1:2 salt form sheets via short intermolecular S···S contacts. A relation between bond lengths and charge is indicated.Keywords
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