Tetraaquabis(3,5-dicarboxybenzoato-O)cobalt(II)

The hydrothermal reaction of cobalt(II) chloride with trimesate (3, 5-dicarboxybenzoate) ions in aqueous solution gives the novel title complex, [Co(C(9)H(5)O(6))(2)(H(2)O)(4)]. The Co(II) ion lies on an inversion centre and is octahedrally coordinated to two trimesate anions and four water molecules. Hydrogen bonds ensure the three-dimensional architecture of the structure.