CRYSTAL AND MOLECULAR-STRUCTURE OF [2-(2-BENZOXAZOLYL)PHENOLATOTETRA-CHLOROPLATINUM].[2-(2-BENZOXAZOLYL)PHENOL].ETHANOL, [PTCL4-(C13H8O2N)].(C13H9O2N).C2H5OH - POSSIBLY A STABLE NEW PENTAVALENT PLATINUM COMPLEX

The crystal and the molecular structures of the title complex were determined by means of the single-crystal X-ray diffraction method. The crystal of PtC28H23O5N2Cl4, F. W. 804.40, (black-violet in color) is monoclinic, with the space group of P2(1)/a, a = 18.293(4), b = 9.682(2), c = 15.797(3) angstrom, beta = 96.55(2)-degrees, U = 2779.6(9) angstrom-3, Z = 4, D(m) = 1.90, D(x) = 1.92 g cm-3, and mu-(Mo K-alpha) = 57.37 cm-1. The platinum atom is in a hexa-coordinated octahedral geometry, where one 2-(2-benzoxazolyl)phenolate (bxp-) ion is chelated with its N and phenolato O atoms. The bxp- ligand as well as the free Hbxp molecule are both approximately planar, and their planes are approximately in parallel: They are arranged alternately and are laid roughly along the a-axis. Although the overlapping areas of the neighboring rings are only 23 and 13% respectively of the whole ring area, the interplane distances are 3.42 and 3.49 angstrom.