CHARGE-TRANSFER PHOTOCHEMISTRY OF THE TERNARY COMPLEX (DITHIOCARBAMATO, DITHIOPHOSPHATO)COPPER(II)

The mixed ligand complex Cu(dtc)(dtp) where dtc is diethyldithiocarbam ate and dtp is diisopropyldithiophosphate has been studied in air-satu rated acetone, toluene and chloroalkane (CHCl3 and CCl4) solutions, Th e results obtained by EPR and UV-vis absorption together with quantum yield data about the photochemical behaviour of the complex Cu(dtc)(dt p) indicate that a homolytic Cu-S bond cleavage involving the dtp liga nd appears as the primary photoprocess. The observed strong solvent ef fect on the conversion of the primary photoproduct Cu-1(Et(2)dtc) is d iscussed in terms of specific donor-acceptor interaction and coordinat ion. A reaction mechanism is proposed to fit the experimental results. (C) 1997 Elsevier Science Ltd.