Open AccessStructure of bis(ethylenedithio)tetrathiafulvalenium dichlorocyanoselenate (2:1), (BEDT-TTF){sub 2}Cl{sub 2}SeCN
Author(s) -
U. Geiser,
J. A. Schlueter,
James D. Dudek,
J.M. Williams
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/212528
Subject(s) - triclinic crystal system , isostructural , tetrathiafulvalene , crystallography , crystal structure , chemistry , ion , salt (chemistry) , molecule , superconductivity , stereochemistry , condensed matter physics , physics , organic chemistry
The electron donor molecule BEDT-TTF has yielded approximately 50 superconductors to date. In addition, numerous other salts with a variety of electrical and magnetic properties have been discovered. Recently, the authors reported a semiconducting salt of BEDT-TTF with the novel T-shaped anion Br{sub 2}SeCN{sup {minus}2}. The crystallographic analysis of that salt revealed a near-centrosymmetric triclinic structure, except for the symmetry-breaking anion. On the basis of a Hamilton R-value test, the non-centrosymmetric space group P1 with ordered anions was preferred over centrosymmetric P{bar 1} with disordered anions. In this paper, the authors present the synthesis and crystal structure of the isostructural chlorine-analogue salt (BEDT-TTF){sub 2}Cl{sub 2}SeCN