Abstract
The photochemical properties of bis(dithiocarbamato)CuII, Cu(R1dtc)2, and bis(dithiophosphato)CuII, Cu(R22dtp)2, complexes with different remote ligand substituents (R1 = piperidine, morpholine, pyrrolidine and 4-phenylpiperazine; R2 = Me, Et and i-Pr) have been studied in chloromethanes (CCl4, CHCl3, CH2Cl2), chloromethanes/EtOH and PhMe. The monomeric species CuII(R1dtc)Cl and its chloride-bridged dimeric form Cu2(R1dtc)2Cl2 were subsequently obtained during Cu(R1dtc)2 photolysis in chloromethane/EtOH mixtures and the steady-state concentration of Cu2(R1dtc)2Cl2 was found to depend on the EtOH content in the mixed solvents as well as on the nature of R1 and the oxidising ability of the chloromethane. The appearance of the mixed-ligand complex CuII(R22dtp)Cl has been observed as an intermediate photoproduct after longer u.v.-irradiation of Cu(R22dtp)2 in chloromethanes/EtOH.
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