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In the centrosymmetric tetra­nuclear title compound, [Sn 4 (C 4 H 9 ) 8 (C 7 H 5 O 3 ) 4 O 2 ], one of the two independent Sn atoms is five-coordinate in a  cis -C 2 SnO 3  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  R2 Sn skeleton [C—Sn—C = 144.0 (1)°], but the geometry is best regarded as being a  trans -C 2 SnO 4  octa­hedron as the Sn–O(single bond) inter­action is shorter [Sn—O = 2.674 (1) Å].

acta crystallographica. section e

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)