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Tetrabutylbis[(2-(benzoylthio)acetato)]-distannoxane C 68 H 100 O 14 S 4 Sn 4  crystallizesas a dimer ( a  = 12.2015(7) Å,  b  = 12.2182(6) Å,  c  = 14.0068(8) Å,  α  = 71.737(4)°,  β  = 79.400(5)°,  γ  = 83.490(5)°) containing a centrosymmetric tetranuclear unit. The tin atoms occupy  cis -trigonal bipyramidal (C–Sn a –C = 132.1(3)°, C–Sn b –C = 132.2(3)°) sites. Tetrabutylbis[2-(2,4-dichloro-5-methylphenylthio)-acetato]distannoxane C 68 H 100 Cl 8 O 10 S 4 Sn 4  ( a  = 11.590(2) Å,  b  = 13.817(2) Å,  c  = 14.304(2) Å,  α  = 71.05(1)°,  β  = 80.62(1)°,  γ  = 81.39(1)°) has this unit, but the geometries at the tin atoms are more distorted  cis -trigonal bipyramids (C–Sn a –C = 145.7(3)°; C–Sn b –C = 140.5(3)°) owing to a different bonding mode of the carboxylato anions.

zeitschrift für kristallographie - crystalline materials

Crystal structures of tetrabutylbis[(2-(benzoylthio)acetato)]-distannoxane and tetrabutylbis[2-(2,4-dichloro-5-methylphenylthio)-acetato]distannoxane dimers