Catena-Poly[[di-tert-butyltin(IV)]-μ-oxalato]

Abstract

The title compound, [Sn(C4H9)2(C 2O4)] n, an unexpected side product in the reaction of di-tert-butyltin(IV) oxide with nitric acid, represents the first diorganotin(IV) oxalate to be structurally characterized. The SnIV atom of the one-dimensional coordination polymer is located on a mirror plane and is coordinated by two chelating oxalate ions with two rather different Sn-O bond lengths of 2.150(1) and 2.425(1)Å, and two t-butyl groups with Sn-C bond lengths of 2.186(2) and 2.190(2)Å. The coordination polyhedron around the SnIV atom is a distorted tetragonal disphenoid. The centrosymmetric oxalate ion also has an asymmetric coordination geometry, as reflected by the two slightly different C-O bond lengths of 1.242(2) and 1.269(2)Å. The chains of the polymer propagate along the b-axis direction. Only van der Waals interactions are observed between the chains.