Research Article: Bis(2-amino­benzothia­zol-3-ium) bis­(7-oxabicyclo­[2.2.1]heptane-2,3-dicarboxyl­ato-κ3O2,O3,O7)zincate hexa­hydrate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Fan Zhang, Tian-Xi Lv, Jie Feng, Qiu-Yue Lin.


In the title hydrated mol­ecular salt, (C7H7N2S)2[Zn(C8H8O5)2]·6H2O, which is isotypic with its MnII, CoII and NiII analogues, the Zn2+ ion lies on a crystallographic inversion centre and a distorted ZnO6 octa­hedral coordination geometry arises from the two doubly deprotonated O,O′,O′′-tridentate ligands. In the crystal, the components are linked by N—H⋯Oa, N—H⋯Ow, Ow—H⋯Oa and Ow—H⋯Ow hydrogen bonds (w = water and a = anion).

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For background to the applications of norcantharidin (systematic name: 7-oxabicyclo­[2,2,1]heptane-2,3-dicarb­oxy­lic anhydride), see: Zeng & Lu (2006 ▶). For the isotypic MnII, CoII and NiII structures, see: Wang et al. (2010a ▶,b ▶, 2012 ▶).