Octa-butylbis[μ(2)-4-(diethyl-amino)-benzoato-κO:O']bis-[4-(diethyl-amino)-benzoato-κO]di-μ(3)-oxido-tetra-tin(IV).

The asymmetric unit of the title complex, [Sn(4)(C(4)H(9))(8)(C(11)H(14)NO(2))(4)O(2)], consists of two crystallographically independent half-mol-ecules. The other halves are generated by crystallographic inversion centers. In each tetra-nuclear mol-ecule, both of the two independent Sn atoms are five-coordinated, with distorted trigonal-bipyramidal SnC(2)O(3) geometries.

(2-Chloro-4-nitro-benzoato)(methanol)triphenyl-tin(IV).

In the title complex, [Sn(C(6)H(5))(3)(C(7)H(3)ClNO(4))(CH(4)O)], the five-coordinate Sn(IV) atom exists in a trigonal-bipyramidal environment, formed by a monodentate carboxyl-ate group, three phenyl rings and a methanol mol-ecule. The axial sites are occupied by the O atoms of the methanol mol-ecule and the carboxyl-ate group, while the equatorial plane is formed by the C atoms of three phenyl rings. The benzene ring of the 2-chloro-4-nitro-benzoate ligand makes dihedral angles of 66.

Octa-butyl-bis-(μ(2)-2-chloro-5-nitro-benzoato)bis-(2-chloro-5-nitro-benzoato)di-μ(3)-oxido-tetra-tin(IV).

The title complex, [Sn(4)(C(4)H(9))(8)(C(7)H(3)ClNO(4))(4)O(2)], is a cluster formed by a crystallographic inversion center around the central Sn(2)O(2) ring. Both of the two independent Sn atoms are five-coordinated, with distorted trigonal-bipyramidal SnC(2)O(3) geometries. One Sn atom is coordinated by two butyl groups, one O atom of the benzoate anion and two bridging O atoms, whereas the other Sn atom is coordinated by two butyl groups, two O atoms of the benzoate anions and a bridging O atom.

Octa-n-butyl-1κC,2κC,3κ,4κC-bis-(μ-2,3-dibromo-propionato)-1:2κO:O',3:4κO:O'-bis-(2,3-dibromo-propionato)-1κO,3κO-di-μ(3)-oxido-1:2:4κO:O:O,2:3:4κO:O:O-tetra-tin(IV).

In the centrosymmetric tetra-nuclear title complex, [Sn(4)(C(4)H(9))(8)(C(3)H(3)Br(2)O(2))(4)O(2)], one of the two independent Sn atoms is five-coordinated by one O atom of the carboxyl-ate anion, two bridging O atoms and two n-butyl groups in a C(2)SnO(3) distorted trigonal bipyramidal geometry. The other Sn atom also has a distorted trigonal bipyramidal geometry, being coordinated by two O atoms of two carboxyl-ate anions, one bridging O atom and two butyl groups. An inter-esting feature of the crystal structure is the short Sn⋯O [2.

[3-(Dimethyl-amino)benzoato]triphenyl-tin(IV).

In the title compound, [Sn(C(6)H(5))(3)(C(9)H(10)NO(2))], the Sn atom is coordinated by three phenyl groups and a carboxyl-ate anion in a distorted tetra-hedral geometry. An intra-molecular C-H⋯O inter-action forms an S(7) ring motif. The dihedral angles between the benzoate group and the other three phenyl rings are 76.