SYNTHESIS AND PHYSICAL-PROPERTIES OF TCNQ CHARGE-TRANSFER SALTS OF TRANSITION-METAL PYRIDINE COMPLEX CATIONS

Eight TCNQ charge-transfer salts of transition-metal pyridine complex cations with the general formula [M(Py)(m)][TCNQ](n) (M = Mn, m = 4; M = Co, Ni, Cu, m = 2; TCNQ = 7,7,8,8-tetracyanocluinodimethane, n = 2, 3) have been synthesized and characterized by elemental analysis, IR s pectrum, ESR spectrum, X-ray photoelectron spectrum, magnetic suscepti bility and electrical conductivity, The results indicate that there ar e TCNQ(-) and TCNQ(o) in the molecules of these charge-transfer salts; TCNQ(-) interacts with TCNQ(o) to form a structural unit [TCNQ](n)(2- ) (n = 2, 3); these structural units stack along with one dimension di rection to form molecular column; it leads the metals of these compoun ds to mixed valence state because partial charges transfer from [TCNQ] (n)(2-) to CM (Py)(m)](2+); three of these charge-transfer salts show a good electrical conductivity.