Studies on intermolecular interactions of metal chelate complexes. V. copper(ii) dithiophosphate complexes: an example of an inner self-redox reaction

EPR study on the photoinduced electron transfer in the ternary complex (dithiocarbamato, dithiophosphato)copper(II)

“…The same equimolar mixtures in CC14, toluene and acetone give identical EPR spectra. As published earlier [5], the gvalues of Cu(dtc)(dtp) are equal to those of the parent complexes: g0 = 2.046 _+ _ 0.003, a(~~Cu) = 79 • 2 G for Cu(dtc)2 and g0 = 2.045 + 0.003, a(63Cu) = -74_ 2 G, a(3~P)= 9.5_ 0.5 G for Cu(dpt)2, respectively [6]. The data of Table 1 show that the 3~p shf splitting in the spectrum of the mixed ligand complex is lower than that found for the parent Cu(dtp) 2.…”

Solvent effect on the ligand exchange between bis(diethyldithiocarbamato)copper(II) and bis(diethyldiselenocarbamato)copper(II)

“…The chromophores of the complexes ML-2 and ML-3 are identified on the ground of the rule of ''additivity'' [2,3,12], but there is no explanation about the pathway of their formation. Important point, first time reported in the present paper, is that the new mixed-ligand complexes appear only in cases when CHCl 3 or CCl 4 are used as medium for reaction (1). Therefore, the appearance of these complexes can be attributed to specific donor-acceptor interaction taking place between the solvent molecules and the reagents.…”

“…where L 1 and L 2 are chelate ligands, is studied relatively well on the basis of electronic and EPR spectra [1]. All available data show that at room temperature Eq.…”

“…1(c) is a superposition of the EPR signals of three complexes-the parents Cu(dsc) 2 and Cu(dtc) 2 mixed-ligand Cu(dtc)(dsc) complex (ML-1). 1 The stick spectra of the three species are given in the bottom of Fig. 1.…”

Solid‐State NMR and EXAFS Spectroscopic Characterization of Polycrystalline Copper(I) O,O′‐Dialkyldithiophosphate Cluster Compounds: Formation of Copper(I) O,O′‐Diisobutyldithiophosphate Compounds on the Surface of Synthetic Chalcocite

“…Copper(i) O,O'-dialkyldithiophosphate compounds are polynuclear and contain only chelating-type ligands, which bridge two or more metal ions. The internal oxidation of the ligand to bis(thiophosphoryl) disulfide with a concomitant reduction of copper(ii) to copper(i) [5] leads to the formation of copper(i) cluster compounds, or cage molecules, containing Cu 4 (tetrahedral), Cu 6 (trigonal antiprismatic), or Cu 8 (cubic) cores in which the copper(i) ions reside in a trigonal plane formed by sulfur atoms. Due to difficulties in producing single crystals amenable to X-ray diffraction, or the inability to distinguish between similar clusters by conventional spectroscopic methods, a limited number of the copper(i) O,O'-dialkyldithiophosphate clusAbstract: A number of polycrystalline copper(i) O,O'-dialkyldithiophosphate cluster compounds with Cu 4 , Cu 6 , and Cu 8 cores were synthesized and characterized by using extended X-ray absorption fine-structure (EXAFS) spectroscopy.…”