ORGANIC METALS BASED ON A SELENIUM ANALOG OF BIS-FUSED TTF

Communication: The selenium analogue of the unsubstituted bis-fused te trathiafulvalene ITP 1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene ) has been synthesized and the conducting properties and crystal struc ture of its molecular complexes are presented. TTP is a promising pi-e lectron framework for the preparation of organic molecular metals beca use of its strong tendency to yield radical cation salts that retain m etallic conductivity down to liquid helium temperature regardless of t he counteranion. However, only poorly characterized derivatives of the selenium-based ITP had been prepared previously.