Copper derivatives of tetrathiafulvalene
Abstract
Oxidation of tetrathiafulvalene with CuCl2.2H2O in ethanol produced the mixed valence metallotetrathia-ethylene (TTF)3(CuCl2)5 containing both TTF+· and TTF2+, which was converted into (TTF)2 CuCl4 on dissolution in hot acetonitrile while the CuCl42– and BF4– salts of TTF2+ were prepared using CuCl2·2H2O and Cu(BF4)2 in acetonitrile; resonance Raman spectroscopy was used to probe the oxidation state of TTF in these copper metallotetrathiafulvalenes, and e.s.r. and magnetic susceptibility data indicate the presence of three-dimensional magnetic interactions in the TTF+ and TTF2+ CuCl42– salts.