Oxygen containing tetrathiapentalene derivative having ethylthio chains

Abstract An oxygen containing tetrathiapentalene (TTP) derivative with ethylthio chains, C 2 TEO-TTP has been synthesized. The charge-transfer complexes show two types of crystal forms and conducting behavior. (C 2 TEO-TTP) 2 X (X=PF 6 and AsF 6 ) have β-type structure and metallic conductivity down to liquid helium temperatures, and (C 2 TEO-TTP) 2 Au(CN) 2 has dimeric donor arrangement and its temperature dependence of conductivity undergoes a hysteric process.