Aquabis(5-methylpyrazine-2-carboxylato)zinc(II) trihydrate

Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan 430073, People's Republic of China.
Acta Crystallographica Section E Structure Reports Online (Impact Factor: 0.35). 09/2009; 65(Pt 9):m1083-4. DOI: 10.1107/S1600536809031778
Source: PubMed


In the title compound, [Zn(C(6)H(5)N(2)O(2))(2)(H(2)O)]·3H(2)O, the Zn(II) centre is five-coordinated by two O,N-bidentate Schiff base ligands and one O atom from a water mol-ecule in a slightly distorted square-pyramidal geometry. In the crystal, the complex and uncoordinated water mol-ecules are linked by O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds, forming a three-dimensional network.

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    ABSTRACT: A two-dimensional coordination polymer [Zn(L)2]n (1) (L = 3-aminopyrazine-2-carboxylate) synthesized from the solvothermal reaction of zinc(II) salt with 3-aminopyrazine-2-carboxylic acid (HL) is described. Compound 1 has been characterized by single X-ray diffraction, IR spectra and thermogravimetric analyses. Crystal structure analysis reveals that each hexacoordinated zinc(II) center adopts a distorted octahedral geometry occupied by three Ocarboxylate and three Npyrazine atoms. The L- ligand binds the metal cation by means of a pyrazine N-atom and one, or both, carboxylate O-atoms. A three-dimensional supra-molecular associate in the crystal lattice of 1 has been stabilized by a number of non-covalent interactions. The IR spectroscopic and TGA properties are investigated in this work. Topological analysis of the two-dimensional network has been also discussed.
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