(2-{[1,1-Bis(hydroxy-meth-yl)-2-oxidoeth-yl]imino-meth-yl}-4-chloro-phenolato-κN,O,O')dibutyl-tin(IV).

The Schiff base ligand in the title compound, [Sn(C(4)H(9))(2)(C(11)H(12)ClNO(4))], chelates to the Sn atom through the two deprotonated O atoms, as well as through the N atom, to confer an overall cis-C(2)SnNO(2) trigonal-bipyramidal geometry at tin [C-Sn-C = 130.3 (1)°]. The hydr-oxy groups engage in O-H⋯O hydrogen bonding with the O atoms of adjacent mol-ecules, generating a chain running along the c axis.

Triclinic modification of di-n-butyl-bis(2-hydroxy-benzoato-κO,O)tin(IV).

The Sn atom in the title compound, [Sn(C(4)H(9))(2)(C(7)H(5)O(3))(2)], is chelated by the carboxyl-ate groups of 2-hydroxy-benzoate liagnds, and exists in a six-coordinate skew-trapezoidal bipyramidal coordination geometry [C-Sn-C = 140.1 (3)°].

Octa-n-butyl-1κC,2κC,3κC,4κC-tetra-kis(µ-2-hydroxy-benzoato)-1:2κO:O;2:3κO:O';3:4κO:O;1:4κO:O'-di-µ(3)-oxido-1:2:3κO:O:O;1:3:4κO:O:O-tetra-tin(IV).

In the centrosymmetric tetra-nuclear 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) inter-action [Sn⋯O = 2.862 (1) Å]. The other Sn atom has a bent R(2)Sn skeleton [C-Sn-C = 144.0 (1)°], but the geometry is best regarded as being a trans-C(2)SnO(4) octa-hedron as the Sn-O(single bond) inter-action is shorter [Sn-O = 2.674 (1) Å].