Acta Cryst. (2003). E59, i62-i64  [ doi:10.1107/S1600536803006378 ]

Cobalt hydrogen selenite chloride dihydrate, Co(HSeO₃)Cl·2H₂O

M. G. Johnston and W. T. A. Harrison

Abstract: Cobalt hydrogen selenite chloride dihydrate, Co(HSeO₃)Cl·2H₂O, is built up from a network of trans CoO₄Cl₂ octahedra, cis Co(H₂O)₄Cl₂ octahedra and HSeO₃ pyramids. These units [d_av(Co-O) = 2.075  (2)  Å, d_av(Co-Cl) = 2.5370  (6)  Å and d_av(Se-O) = 1.703  (2)  Å] share vertices by way of Co-O-Se and Co-Cl-Co bonds to produce a three-dimensional structure. Co of the trans octahedron occupies an inversion centre; Co of the cis octahedron and two attached water O atoms lie on a mirror plane. The hydrogen-bonding scheme has been elucidated and involves O-HO and O-HCl interactions. The title compound is isostructural with Cu(HSeO₃)Cl·2H₂O, although the metal polyhedra are distinctly different in the two phases.

Online 31 March 2003

Copyright © International Union of Crystallography
IUCr Webmaster