Research Article: catena-Poly[[diaqua­manganese(II)]-μ-7-oxabicyclo­[2.2.1]heptane-2,3-dicarboxyl­ato]

Date Published: June 01, 2010

Publisher: International Union of Crystallography

Author(s): Na Wang, Jie Feng, Dong-Hang Wang, Qiu-Yue Lin.


In the title polymer, [Mn(C8H8O5)(H2O)2]n, the MnII atom is in a distorted octa­hedral coordination mode, binding to the bridging O atom of the bicyclo­heptane unit, two O atoms from corresponding carboxyl­ate groups, one carboxyl­ate O atom from a symmetry-related bridging ligand and two water O atoms. This arrangement leads to the formation of polymeric chains propagating parallel to [001]. The crystal structure is stabilized by several O—H⋯O hydrogen-bonding inter­actions involving the coordinated water mol­ecules as donors and the carboxyl­ate O atoms as acceptors.

Partial Text

7-Oxabicyclo­[2.2.1]heptane-2,3-dicarb­oxy­lic anhydride (nor­can­tharidin) is a lower toxicity anti­cancer drug, see: Shimi et al. (1982 ▶). For the preparation of disodium demethyl­cantharate, see: Yin et al. (2003 ▶).




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