Research Article: Aqua­(2,6-dihy­droxy­benzoato-κO1)bis­(1,10-phenanthroline-κ2N,N′)manganese(II) 2,6-dihy­droxy­benzoate hemihydrate

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Quanwei Li, Li He, Hongxiao Jin.


In the complex cation of the title compound, [Mn(C7H5O4)(C12H8N2)2(H2O)](C7H5O4)·0.5H2O, the MnII atom has a six-coordinate octa­hedral environment defined by one carboxyl­ate O atom belonging to a 2,6-dihy­droxy­benzoate (DHB) ligand, four N atoms from two chelating 1,10-phenanthroline mol­ecules and one water mol­ecule. The lattice water mol­ecule lies on a twofold rotation axis. Intra­molecular O—H⋯O hydrogen bonds are present in the DHB anions and complex cations. Inter­molecular O—H⋯O hydrogen bonds link two cations, two anions and one water mol­ecule into a dimer. π–π inter­actions between the pyridine and benzene rings and between the benzene rings are also observed [centroid–centroid distances = 3.7774 (16), 3.7912 (16) and 3.7310 (17) Å].

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For related structures of dihy­droxy­benzoate manganese(II) complexes, see: Garribba et al. (2004 ▶). For the structure of a neodymium(III) complex containing 2,6-dihy­droxy­benzoate ligands, see: Zheng et al. (2010 ▶).