Structural organization of silver(I) complexes with O,O′-dialkyl dithiophosphates: Solid-state 13C and 31P CP/MAS NMR and single-crystal X-ray diffraction studies
摘要:
Silver(I) complexes with four symmetrically substituted O,O'-dialkyl derivatives of dithiophosphoric acid of the general formula [Ag{S2P(OR)(2)}](n) (R = C2H5, i-C3H7, C4H9, and s-C4H9) were obtained. Their structures and spectroscopic characteristics were studied by solid-state C-13 and P-31 CP/MAS NMR spectroscopy and X-ray diffraction analysis. The parameters of the anisotropy of the P-31 chemical shift P-31 - delta(aniso) and eta (delta(aniso) is the chemical shift anisotropy and eta is the asymmetry parameter) calculated from the diagrams of the chi(2)- statistic revealed that the (RO)(2)PS2 groups act as bridging ligands in all the silver(I) complexes obtained. The hexanuclear complex [Ag-6{S2P(O-i-C3H7)(2)}(6)] was found to form two modifications alpha and beta. According to the X-ray diffraction data, the silver(I) complex with O,O'-di-s-butyl dithiophosphate exists as discrete hexanuclear molecules [Ag-6{S2P(O-s-C4H9)(2)}(6)]. In the P-31 NMR spectra of beta-[Ag-6{S2P(O-i-C3H7)(2)}(6)], the signals for the phosphorus atoms were assigned to their positions determined from the X-ray diffraction data.