Aquabis[1-hydroxy-2-(imidazol-3-ium-1-yl)-1,1_- ethylidenediphophonato-κ2O,O_]zinc(II) dihydrate.

ELEONORA FREIRE; DANIEL VEGA

ACTA CRYSTALLOGRAPHICA SECTION E

WILEY-BLACKWELL PUBLISHING, INC

Año: 2009 vol. 65 p. 1430 - 1431

1600-5368

In the title complex, [Zn(C5H9NO7P2)2(H2O)]2H2O, the zincatom is coordinated by two zoledronate anions [zoledronate =(2-(1-imidazole)-1-hydroxy-1,10-ethylidenediphophonate)]and one water molecule. The coordination number is 5.There is one half-molecule in the asymmetric unit, the zincatom being located on a twofold rotation axis passingthrough the metal centre and the coordinating water Oatom. The anion exists as a zwitterion with an overallcharge of 1; the protonated nitrogen in the ring has apositive charge and the two phosphonates groups eachhave a single negative charge. Intermolecular O—H  Ohydrogen bonds link the molecules. An N—H  O interactionis also present.