Die Kristallstruktur von Antimontetrachlorid-cyanurat [SbCl4NCO]3

The Crystal Structure of Antimony Tetrachloride Cyanurate [SbCl₄NCO]₃ [SbCl₄NCO]₃ crystallizes in the hexagonal space group P6₃/m with two formula units per unit cell; the lattice parameters are a = 1167 and c = 995 pm. The crystal structure was solved with X-ray diffraction data by means of a Patterson and a Fourier Synthesis and was refined by the method of least-squares to a reliability index of R = 3.6% for the 863 observed reflexions. The structure consists of [SbCl₄NCO]₃ molecules having the point symmetry 6 . The molecule is a derivate of cyanuric acid in a way such that each Sb atom is bonded in chelate manner by one N and one O atom; together with 4 Cl atoms the antimony attains a distorted octahedral coordination. The packing density in the crystal is not optimal, there exist cavities.