Poly[tetra-aqua-di-μ(4)-malonato-barium(II)cadmium(II)

Ming-Lin Guo,Wen-Jun Gao,Cong-Cong Luo,Long Liu

doi:10.1107/s1600536810049780

Ming-Lin Guo, Wen-Jun Gao + Show 2 more

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https://doi.org/10.1107/s1600536810049780

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Abstract

In the title complex, [BaCd(C3H2O4)2(H2O)4]n, the BaII atoms, located on crystallographic twofold axes, adopt slightly distorted square-antiprismatic coordination geometries, while the CdII atoms, which lie on crystallographic centres of symmetry, have a distorted octahedral coordination. Each malonate dianion binds two different CdII atoms and two different BaII atoms. This connectivity generates alternating layers along [100] in the structure, with one type containing CdII cations and malonate dianions, while the other is primarily composed of BaII ions and coordinated water molecules. The water molecules also participate in extensive O—H⋯O hydrogen bonding.

Highlights

In the title complex, [BaCd(C3H2O4)2(H2O)4]n, the Ba atoms, located on crystallographic twofold axes, adopt slightly distorted square-antiprismatic coordination geometries, while the CdII atoms, which lie on crystallographic centres of symmetry, have a distorted octahedral coordination
CdII cations and malonate dianions, while the other is primarily composed of BaII ions and coordinated water molecules
Symmetry codes: (i) x, −y+1/2, z+1/2; (iv) −x+1, −y+1, −z+1; (vi) −x+1, y−1/2, −z+1/2; (viii) x, y−1, z

Summary

Data collection

Fiber Membrane Materials & Membrane Processes, Tianjin Polytechnic University, Tianjin 300160, People’s Republic of China. In the title complex, [BaCd(C3H2O4)2(H2O)4]n, the Ba atoms, located on crystallographic twofold axes, adopt slightly distorted square-antiprismatic coordination geometries, while the CdII atoms, which lie on crystallographic centres of symmetry, have a distorted octahedral coordination. Each malonate dianion binds two different CdII atoms and two different BaII atoms. This connectivity generates alternating layers along [100] in the structure, with one type containing. CdII cations and malonate dianions, while the other is primarily composed of BaII ions and coordinated water molecules. For structural studies on the malonate dianion with its versatile coordination patterns, see: Delgado et al (2004). See Djeghri et al (2005); Guo & Guo (2006)

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