SYNTHESIS AND PROPERTIES OF NOVEL COMPONENTS FOR ORGANIC METALS - DIHYDROTELLUROPHENE DERIVATIVES

Two series of dihydrotellurophenes have been synthesized: derivatives of 4,6-dibydro-1H,3,H-telluropheno[3,4-c]tellurophene (1) and derivati ves of ,3,6,8-tetrahydrobenzo[1,2-c;3,4-c']ditellurophene (2). X-Ray s tructure determinations confirm the tetraiodo structures of 1a and 2a. The tetraiodo derivatives are reduced by sodium borohydride to the co rresponding dihydrotellurophenes, Ib and 2b, which undergo the charact eristic divalent tellurium reaction with iodomethane to form telluroni um methiodides. Both dihydrotellurophenes Ib and 2b are moderate elect ron donors and react with 7,7,8,8-tetracyanoqiunodimethane TCNQ afford ing blue semiconductive solids.