Received 1 December 2010
In the title compound, [Zn(C10H5O4)2(H2O)2], the ZnII atom lies on a crystallographic inversion center and is six-coordinated by two O atoms from water molecules in the axial positions and four O atoms from two deprotonated coumarin-3-carboxylate ligands in the equatorial plane, forming a slightly distorted octahedral coordination geometry. O-HO hydrogen-bonding interactions involving the water molecules form infinite chains parallel to .
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: DN2633 ).
This work was supported by the National Natural Science Foundation of China (No. 21075114), the Science and Technology Development Project of Beijing Education Committee and the Special Environmental Protection Fund for Public Welfare project (201009015).
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555-1573.
Bruker (2005). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Burnett, M. N. & Johnson, C. K. (1996). ORTEPIII. Report ORNL-6895. Oak Ridge National Laboratory, Tennessee, USA.
Chu, W. J., Yao, H. C., Ma, H. C., He, Y., Fan, Y. T. & Hou, H. W. (2010). J Coord. Chem. 63, 3734-3742.
Etter, M. C. (1990). Acc. Chem. Res. 23, 120-126.
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.