1,1′-Di-tert-butyl-2,2′,3,3′,4,4′,5, 5′-octa-ethyl-1,1′-bis-tannole

Abstract

The title compound, [Sn 2(C 4H 9) 2(C 12H 20) 2], has two 1-stannacyclo-penta-diene skeletons related by inversion symmetry located at the mid-point of the Sn - Sn bond [2.7682 (2) Å]. Thus, the asymmetric unit comprises one half-mol-ecule. The planarity of the stannacyclo-penta-diene ring is illustrated by the dihedral angle of 0.3 (1)°, defined by the C4 and C - Sn - C planes. To avoid steric repulsion, the two stannole rings are oriented in an anti fashion through the Sn - Sn bond. These structural features are similar to those of other bis-tannoles. © Kuwabara and Saito 2011.