作者:A. S. Antsyshkina、G. G. Sadikov、T. V. Koksharova、I. S. Gritsenko、V. S. Sergienko
DOI:10.1134/s003602360610010x
日期:2006.10
A copper(II) valerate complex with nicotinamide ( L) [CuL2(C4H9COO)(2)] (I) has been synthesized and studied by IR spectroscopy and thermogravimetry. The crystal structure has been determined. The crystals of I are monoclinic, a = 11.297(1) angstrom, b = 6.666(1) angstrom, c = 16.873(2) angstrom, b = 108.50(1)degrees, V = 1204.9(3) angstrom(3), Z = 2, space group P2(1)/c. The structural units of the crystal of I are centrosymmetric tetragonal bipyramidal (4+2) complex molecules. The equatorial positions of the bipyramid are occupied by trans-arranged pairs of O(Cu-O, 1.973 angstrom) and N (Cu-N, 2.006 angstrom) atoms, and the axial positions are occupied by the second O atoms of the valerate anions located at longer distances (Cu-O, 2.506 angstrom). The supramolecular associates formed in the crystal are layers of hydrogen-bonded complexes. The disordered hydrocarbon "tails" of the valerate groups point toward the interlayer space.