STRUCTURE AND PHYSICAL-PROPERTIES OF 2 PERCHLORATE SALTS DERIVED FROM A NOVEL TWIN DONOR - BIS(4',5'-ETHYLENEDITHIO-5-METHYLTHIOTETRATHIAFULVALENYL-4-THIO)METHANE

A twin donor (1) which consists of two BEDT-TTF moieties linked by a methylenedithio bridge was prepared. Two radical salts of ClO4- with the stoichiometry of 1:1 and 2:1 were obtained through electrochemical crystallization. In the salt of 1.ClO4, the donor has a phane-like conformation. A magnetic behavior of the salt was interpreted by the one-dimensional antiferromagnetic Heisenberg model. On the other hand, the donor exist as a twist phane like conformation in the salt of 1.(ClO4)0.5 and the salt is a semiconductor (sigma(rt) = 0.1 S cm-1)) with an activation energy of 5 x 10(-2) eV.