Syntheses and Properties of 11,11,12,12-Tetracyano-2,6-anthraquinodimethane (TANT) and Its 9,10-Dichloro Derivative as Novel Extensive Electron Acceptors

The title compound (TANT) and its 9,10-dichloro derivative (TANT-Cl) have been prepared as higher homologues in an extended electron-acceptor series of TCNQ and TNAP. On the basis of cyclic voltammetry, the accepting ability of TANT is nearly comparable to those of TCNQ and TNAP, and that of TANT-Cl is further enhanced by the chloro substitutuent groups. In addition, TANT and TANT-Cl show an effective reduction of on-site coulombic repulsion, due to their extensive anthraquinone quinonoid system. They thus behave as superior electron acceptors for forming electrically conductive charge-transfer complexes with various electron donors, mostly of the TTT type.