The crystal structure of potassium citratodifluoroantimonate(III) hydrate

The crystal structure of the mixed antimony(III) citratofluoro complex KSbF2(C6H6O7) . H2O is constructed of K+ cations, complexed [SbF2(C6H6O7)](-) anions, and the water molecules of crystallization. The Sb coordination polyhedron is a distorted trigonal bipyramid with a vacant equatorial vertex occupied by a electron lone pair (the AX(4)E configuration according to Gillespie). The axial vertices of the trigonal bipyramid are occupied by the F(2) and O(1) atoms [Sb-F(2), 1.976 Angstrom and Sb-O(1), 2.246 Angstrom; F(2)SbO(1) angle, 150.9 degrees]. The equatorial vertices of the bipyramid are occupied by the F(1) and O(3) atoms [Sb-F(1), 1.948 Angstrom and Sb-O(3), 1.976 Angstrom; F(1)SbO(3) angle, 98.4 degrees]. The bridging O(1)(a) atom [Sb-O(1)(a), 3.218 Angstrom] combines the [SbF2(C6H6O7)] complexes in the dimers.