Crystal structure of bis-(benzoato-?O)di-butyl-tin(IV), nBu2Sn(bzo)2.

ABSTRACT: The title compound, [Sn(C4H9)2(C6H5COO)2], was synthesized in order to study the inter-action between di-n-butyl-tin(IV) oxide and some carb-oxy-lic acids. Di-n-butyl-tin(IV) dibenzoate, nBu2Sn(obz)2, exhibits the same structural features as other diorganotin(IV) dibenzoates characterized by an unsymmetrical bidentate bonding mode [?(Sn-O) ? 0.4?Å] of the two benzoate groups to tin. In a first approximation, the coordination sphere at tin resulting from the two stronger bonded O atoms [2.1227?(17) and 2.1405?(16)?Å] and the two ?-C atoms of the n-butyl groups [2.125?(3) and 2.129?(2)?Å] is compressed to a tetra-gonal disphenoid [?(C-Sn-C) = 148.2?(1)° and ?(O-Sn-O) = 82.01?(6)°]. This coordination sphere is expanded by the less strongly bonded two O atoms [2.507?(2) and 2.485?(2)?Å] to a substanti-ally distorted octa-hedron and by a weak inter-molecular Sn?O inter-action [2.943?(2)?Å] to a penta-gonal bipyramid with the formation of centrosymmetric dimers. The unbranched butyl groups adopt two different conformations: anti-gauche [torsion angles: 166.0?(2)-63.9?(4)°] and gauche-gauche [65.0?(3)-56.3?(3)°]. Inter-molecular inter-actions between the dimers are restricted to O?H-C contacts (2.64?Å) and van der Waals inter-actions.

SUBMITTER: Reuter H 

PROVIDER: S-EPMC4992901 | biostudies-other | 2016 Jul

REPOSITORIES: biostudies-other