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

ABSTRACT 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: Two novel two-dimensional silver(I) polymers, [Ag(5-bsa)]n (1) and [Ag(2-aba)]n (2) (5-bsaH = 5-bromosalicylic acid and 2-abaH = 2-aminobenzoic acid), have been synthesized from the reaction of Ag2O and carboxylate ligands in ammonia solution and structurally determined by single-crystal X-ray diffraction analyses. 1 crystallizes in the monoclinic space group P21/c with a = 7.316(2), b = 8.171(2), c = 13.051(3) Å, U = 777.0(3) Å3, β = 95.14(3) and Z = 4. 2 crystallizes in the orthorhombic space group Pna21 with a = 5.9486(8), b = 24.227(3), c = 4.9042(6) Å, U = 706.8(2) Å3, and Z = 4. In 1, 5-bsa serves as tridentate ligands coordinating to three Ag+ ions through its hydroxyl and bridging ligand carboxyl groups, with the Ag-Ag bonding and two carboxylate ions defined in a slight distorted plane and further extending into a two-dimension layer through the hydroxyl and the overlapping and off-set stacking interactions. In 2, adjacent Ag+ ions via Ag-Ag bonding interactions generate a one-dimension silver chain and adjacent silver chains are further linked by μ2-N, O atoms of 2-aba to result in a two-dimensional configuration, with the inter-chain hydrogen bonding interaction forming a three-dimension supramolecular structure. Both the two silver(I) complexes have strong inhibitory activities against Jack Bean urease with the IC50 values of 21.98 μM for 1 and 25.34 μM for 2, but neglectable inhibition activity on Xanthine Oxidase.
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