Octa-n-butyl-1κ2C,2κ2C,3κ2C,4κ2C-tetrakis(μ-2-hydroxybenzoato)-1:2κ2O:O;2:3κ2O:O′;3:4κ2O:O;1:4κ2O:O′-di-μ3-oxido-1:2:3κ3O:O:O;1:3:4κ3O:O:O-tetratin(IV)

Abstract

In the centrosymmetric tetranuclear title compound, [Sn4(C4H9)8(C7H5O3)4O2], one of the two independent Sn atoms is five-coordinate in a cis-C2SnO3 trigonal-bipyramidal geometry [C—Sn—C = 142.7 (1)°]; the geometry is distorted owing to a long Sn...O(double bond) interaction [Sn...O = 2.862 (1) Å]. The other Sn atom has a bent R2Sn skeleton [C—Sn—C = 144.0 (1)°], but the geometry is best regarded as being a trans-C2SnO4 octahedron as the Sn–O(single bond) interaction is shorter [Sn—O = 2.674 (1) Å].