Disodium tricopper(II) tetrakis[selenate(IV)] tetrahydrate

Wei Liu,Kai Hu,Jingtai Zhao,Ge Su,Lixin Cao,Lan Zhang

doi:10.1107/s160053680803434x

Abstract

The title compound, Na2Cu3(SeO3)4(H2O)4, has been prepared under hydrothermal conditions. The crystal structure contains a three-dimensional anionic framework made up from distorted [CuO4(H2O)2] octahedra ( symmetry), [CuO4(H2O)] square pyramids and trigonal-pyramidal SeO3 units sharing common corners. The connectivity among these units leads to four- and eight-membered polyhedral rings, which by edge-sharing interconnect into walls. A rhombus-like 16-membered polyhedral ring channel system with a longest length of approximately 14.0 Å and a shortest length of 5.3 Å is enclosed by such walls along the a axis. The water molecules attached to the Cu atoms, as well as the electron lone pairs of the SeIV atoms, protrude into these channels. The seven-coordinated Na+ counter-cations occupy the remaining free space of the 16-membered polyhedral ring channels. An intricate network of O—H⋯O hydrogen bonds further consolidates the three-dimensional structure.

Highlights

The title compound, Na2Cu3(SeO3)4(H2O)4, has been prepared under hydrothermal conditions
H atoms treated by a mixture of independent and constrained refinement
The crystal structure contains a three-dimensional anionic framework made up from distorted [CuO4(H2O)2] octahedra (1 symmetry), [CuO4(H2O)] square pyramids and trigonal-pyramidal SeO3 units sharing common corners. The connectivity among these units leads to four- and eight-membered polyhedral rings, which by edge-sharing interconnect into walls

Summary

Bruker SMART CCD diffractometer

Symmetry codes: (i) Àx À 1; y À 12; Àz þ 12; (ii) x þ 1; y; z; (iii) x À 1; y; z. The crystal structure contains a three-dimensional anionic framework made up from distorted [CuO4(H2O)2] octahedra (1 symmetry), [CuO4(H2O)] square pyramids and trigonal-pyramidal SeO3 units sharing common corners. The connectivity among these units leads to four- and eight-membered polyhedral rings, which by edge-sharing interconnect into walls. A rhombus-like 16-membered polyhedral ring channel system with a longest length of approximately 14.0 Aand a shortest length of 5.3 Ais enclosed by such walls along the a axis. The sevencoordinated Na+ counter-cations occupy the remaining free space of the 16-membered polyhedral ring channels. An intricate network of O—HÁ Á ÁO hydrogen bonds further consolidates the three-dimensional structure

Related literature

DÁ Á ÁA

Crystal data

Special details