Zhang Fan, Jia Ai-Ping, Lin Qiu-Yue
Acta Crystallogr Sect E Struct Rep Online. 2011 Aug 1;67(Pt 8):m1119-20. doi: 10.1107/S1600536811028431. Epub 2011 Jul 23.
The title complex, [Co(C(8)H(8)O(5))(H(2)O)(3)]·H(2)O, was synthesized by reaction of cobalt acetate with 7-oxabicyclo-[2.2.1]heptane-2,3-dicarb-oxy-lic anhydride (norcantharidin) in aqueous solution. In the mol-ecule, the Co(II) atom is six-coordinated in a distorted octa-hedral environment, binding to the bridging O atom of the bicyclo-heptane unit, to two O atoms from monodentate carboxyl-ate groups and to three water O atoms. The crystal structure is stabilized by several O-H⋯O hydrogen-bonding inter-actions involving both the coordinated and uncoordinated water mol-ecules as donors and the carboxyl-ate O atoms of neighbouring mol-ecules as acceptors.
标题配合物[Co(C₈H₈O₅)(H₂O)₃]·H₂O是通过醋酸钴与7-氧杂双环-[2.2.1]庚烷-2,3-二羧酸酐（去甲斑蝥素）在水溶液中反应合成的。在分子中，Co(II)原子在扭曲的八面体环境中呈六配位，与双环庚烷单元的桥连O原子、来自单齿羧酸根基团的两个O原子以及三个水分子的O原子配位。晶体结构通过几种O-H⋯O氢键相互作用得以稳定，其中配位和未配位的水分子作为供体，相邻分子的羧酸根O原子作为受体。
