EPR STUDY ON THE COMPLEX FORMED BY CHARGE-TRANSFER PROCESS BETWEEN GROUND-STATE ACCEPTOR CHLORANIL AND 9 DONORS

EPR study showed that the semi-quinone radical anion of chloranil (TCQ ) was formed in a charge-transfer process between ground state chloran il as acceptor and each one of the following ground state donors, i.e. , N, N-diethyl aniline (DEA), phenothiazine (PTZ), carbazole (CBZ), py rene (PY), ferrocene (FRO), triphenylphosphine (TPP), triethylamine (T EA), anthracene (AN) and N, N-diethyl-3-aminophenyl eater of palmitic acid (DPP). Our results indicate that there is a tunneling effect for the ground-state charge-transfer process between chloranil and the don or.