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Journal of Coordination Chemistry Volume 69, 2016 - Issue 16
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Articles

Calcium complex of 2,5-dihydroxybenzoic acid (gentisic acid): synthesis, crystal structure, and spectroscopic properties

M. KalinowskaDivision of Chemistry, Bialystok University of Technology, Bialystok, PolandCorrespondence[email protected]
,
L. MazurDepartment of General and Coordination Chemistry, Maria Curie-Sklodowska University, Lublin, Poland
,
E. RegulskaDivision of Chemistry, Bialystok University of Technology, Bialystok, Poland
,
A. KorczakInstitut des Sciences at Techniques, University of Mont HouyLe Mont Houy, Valenciennes, France
,
G. ŚwiderskiDivision of Chemistry, Bialystok University of Technology, Bialystok, Poland
&
W. LewandowskiDivision of Chemistry, Bialystok University of Technology, Bialystok, Poland
Pages 2415-2421 | Received 15 Feb 2015, Accepted 23 Mar 2016, Published online: 26 Jun 2016
 
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Abstract

The synthesis, crystal structure, and spectral characteristics (IR, Raman, and 1H and 13C NMR) of a monomeric hexa(aqua)calcium compound, viz. [Ca(C7H5O4)2(H2O)6]·H2O (C7H5O4 = 2,5-dihydroxybenzoate), are reported. The central Ca(II) located on a twofold axis is eight coordinate in an approximate square antiprismatic environment, bonded to two monodentate 2,5-dihydroxybenzoate ligands via the carboxylate oxygen, and six waters. The adjacent monomeric units are linked with the aid of several O–H⋯O hydrogen bonds.

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