Copper(II) and Nickel(II) Alkylxanthate Complexes (R = C2H5, i-C3H7, i-C4H9, s-C4H9, and C5H11): EPR and Solid-State13C CP/MAS NMR Studies
摘要:
Alkylxanthate complexes of the general formula [M{S(S)COR}(2)] (M = Ni, Cu-63, and Cu-65; R C2H5, i-C3H7, i-C4H9, s-C4H9, and C5H11) were synthesized and studied by EPR and high-resolution solid-state C-13 CP/MAS NMR. In the copper(II) complexes stabilized in the matrix of nickel(II) compounds, square planar chromophores [CuS4] are characterized by rhombic distortion (EPR data). Experimental EPR spectra were simulated at the second order of perturbation theory. Nickel(II) complexes were characterized by C-13 NMR spectra. In all cases, the -OC(S)S- groups were found to exhibit intramolecular structural equivalence.