Tetraaquabis(4-formylbenzoato-κO)cobalt(II) tetrahydrate

Zhao-Peng Deng,Shan Gao,Li-Hua Huo,Seik Weng Ng

doi:10.1107/s1600536808003140

Zhao-Peng Deng, Shan Gao + Show 2 more

Open Access

https://doi.org/10.1107/s1600536808003140

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Abstract

The CoII atom in the title compound, [Co(C8H5O3)2(H2O)4]·4H2O, which exists in an all-trans octahedral coordination geometry, lies on a center of inversion. The coordinated and uncoordinated water molecules engage in extensive hydrogen-bonding interactions, forming a three-dimensional hydrogen-bonded network.

Highlights

The CoII atom in the title compound, [Co(C8H5O3)2(H2O)4]Á4H2O, which exists in an all-trans octahedral coordination geometry, lies on a center of inversion
The reaction with pyridine in place of sodium hydroxide yielded the formylbenzoate-coordinated title compound. This is isostructural with the nickel analog; see Deng et al (2006a)
Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002); method used to solve structure: atomic coordinates taken from the isostructural nickel analog; program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2008)

Summary

Structure Reports Online

Key indicators: single-crystal X-ray study; T = 295 K; mean (C–C) = 0.002 A; R factor = 0.027; wR factor = 0.080; data-to-parameter ratio = 13.9. The CoII atom in the title compound, [Co(C8H5O3)2(H2O)4]Á4H2O, which exists in an all-trans octahedral coordination geometry, lies on a center of inversion. The coordinated and uncoordinated water molecules engage in extensive hydrogenbonding interactions, forming a three-dimensional hydrogenbonded network. Related literature Hexaaquacobalt(II) bis(4-formylbenzoate) dihydrate was isolated from the reaction of cobalt(II) acetate and 4formylbenzoic acid in the presence of sodium hydroxide; see Deng et al (2006b). The reaction with pyridine in place of sodium hydroxide yielded the formylbenzoate-coordinated title compound. This is isostructural with the nickel analog; see Deng et al (2006a)

Data collection

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