Abstract
The title compound, [Sr(C7H4NO4)(H2O)7](C7H4NO4)·2H2O, was synthesized from the aqueous reaction of strontium carbonate with 4-nitrobenzoic acid. The structure consists of a nine-coordinate heptaaqua(4-nitrobenzoato-κ2O,O′)strontium(II) complex cation, an uncoordinated 4-nitrobenzoate anion and two solvent water molecules. The cations, anions and solvent water molecules are linked with the aid of several O—H⋯O and C—H⋯O interactions, resulting in a three-dimensional hydrogen-bonding network. The hydrogen bonding between a solvent water molecule and a symmetry-related solvent water molecule results in the formation of a water dimer.
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