STRUCTURE OF DIBUTYLTIN BIS(P-NITROBENZOATE)

[Sn(C4H9)2(C7H4NO4)2], M(r) = 565.15, monoclinic, C2/c, a = 15.694 (7), b = 7.042 (5), c = 22.950 (11) angstrom, beta = 103.64 (4)-degrees, V = 2465 (2) angstrom 3, Z = 4, D(x) = 1.53 Mg m-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 1.08 mm-1, F(000) = 1144, T = 293 K, R = 0.054 for 1023 observed reflexions. The compound is monomeric. The Sn atom lies on a crystallographic twofold axis and displays skew-trapezoidal bipyramidal coordination. The basal plane is defined by the two asymmetrically chelating carboxylate groups [Sn-O(1) 2.089 (7) and Sn-O(2) 2.645 (7) angstrom]. The C-Sn-C angle is 137.1 (6)-degrees.