Di-n-butylbis(2′,4′-difluoro-4-hydroxybiphenyl-3-carboxylato-O,O′)tin(IV)

The crystal structure of the title compound, [Sn(C4H9)(2)(C13H7F2O3)(2)], contains discrete molecules in which the central Sn atoms are asymmetrically coordinated to two carboxylates and by two C atoms of two n-butyl groups. The Sn-C distances are identical within 3sigma limits [mean Sn-D C 2.118 (2) Angstrom]. The Sn-O distances are significantly different from each other, with the mean value for the shorter distances being 2.098 (3) Angstrom, while the longer Sn-O distances are 2.570 (3) and 2.686 (3) Angstrom. The geometry around the Sn atom is highly distorted octahedral, that may be best described as one based on skew-trapezoidal planar geometry. The hydroxyl groups and the carboxylate O atoms are hydrogen bonded, forming six-membered rings and exhibit an S(6) pattern of hydrogen bonding.