Crystal Structure of [MU]-Oxo-Bis[aquapyridine-2,6-dicarboxylato-antimony(III)]

The crystal structure of [Sb(pydc)(H2O)]2O was determined by X-ray diffraction. This compound crystallizes in the monoclinic system, space group P21/n, with the following unit-cell parameters: a = 5.234(1)Å, b = 11.164(2)Å, c = 14.331(3)Å, β = 97.49(3)[Degree]. The final R value is 0.0384 with 1226 reflections. This compound is a five-coordinated binuclear complex in which each of the two metal fragments are arranged via weak intermolecular Sb...O interactions. The binuclear units join together by axial Sb-O, and thus make a distorted square pyramid binuclear complex. The existence of a hemi-directed configuration in the complex is due to the activity of the lone electron pair on antimony.