Bis(μ2-2-amino-5-nitrobenzoato)bis(2-amino-5-nitrobenzoato)octabutyldi-μ3-oxido-tetratin(IV)

Abstract

In the title complex, [Sn4(C4H9)8(C7H5N2O4)4O2], all four SnIV atoms are five-coordinated with distorted trigonal–bipyramidal SnC2O3 geometries. Two SnIV atoms are coordinated by two butyl groups, one benzoate O atom and two bridging O atoms, whereas the other two SnIV atoms are coordinated by two butyl groups, two benzoate O atoms and a bridging O atom. All the butyl groups are equatorial with respect to the SnO3 trigonal plane. In the crystal, molecules are linked into a two-dimensional layer parallel to the ab plane by intermolecular N—H...O and C—H...O hydrogen bonds and further stabilized by a π–π interaction [centroid–centroid distance = 3.6489 (11) Å]. Intramolecular N—H...O and C—H...O hydrogen bonds stabilize the molecular structure. Two of the butyl groups are each disordered over two sets of sites with site-occupancy ratios of 0.510 (4):0.490 (4) and 0.860 (5):0.140 (5).