作者:S. V. Larionov、T. E. Kokina、L. A. Glinskaya、R. F. Klevtsova
DOI:10.1023/a:1011341716651
日期:——
Diamagnetic [Ni(i-Bu2PS2)(2)] compound (I) in ethanol reacts with 2,2 ' -bipyridine or pyrazine to give the paramagnetic complexes [Ni(2,2 ' -Bipy)(i-Bu2PS2)(2)] (II), [Ni(Pz)(2)(i-Bu2PS2)(2)] (III), and [Ni(Pz)(i-Bu2PS2)(2)](n) (IV) (mu (eff) = 2.91-3.12 mu (B)). Single crystals of II were grown for X-ray diffraction study. The crystals are monoclinic, a = 14.669(3) Angstrom, b = 19.693(4) Angstrom, c = 12.155(2) Angstrom, beta = 107.51(3)degrees, V= 3348(1) Angstrom (3), Z = 4; rho (calcd) = 1.257 g/cm(3), space group P2(1)/c. The structure is built from monomeric molecules. The coordination polyhedron of the Ni atom is a distorted octahedron formed by four S atoms of two bidentate chelating i-BU2PS2- ligands and by two N atoms of bidentate cyclic 2,2 ' -Bipy. Preliminary data for complexes III and IV indicate that they also contain an octahedral NiN2S4 fragment. The structures of complexes I (square planar) and of II-IV (octahedral) were confirmed by data from electron spectroscopy. Electronic absorption spectra were used to determine the rankings of the i-Bu2PS2- ions and Pz on a spectrochemical scale.