2-Amino-3-nitro-benzoic acid.

The title compound, C(7)H(6)N(2)O(4), is approximately planar (r.m.s.

Bis(μ(2)-2-amino-5-nitro-benzoato)bis-(2-amino-5-nitro-benzoato)octa-butyldi-μ(3)-oxido-tetra-tin(IV).

In the title complex, [Sn(4)(C(4)H(9))(8)(C(7)H(5)N(2)O(4))(4)O(2)], all four Sn(IV) atoms are five-coordinated with distorted trigonal-bipyramidal SnC(2)O(3) geometries. Two Sn(IV) atoms are coordin-ated by two butyl groups, one benzoate O atom and two bridging O atoms, whereas the other two Sn(IV) atoms are coordinated by two butyl groups, two benzoate O atoms and a bridging O atom. All the butyl groups are equatorial with respect to the SnO(3) trigonal plane.

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.

(4-Chloro-3-nitro-benzoato)triphenyl-tin(IV).

In the title compound, [Sn(C(6)H(5))(3)(C(7)H(3)ClNO(4))], the four-coordinate Sn(IV) atom exists in a distorted tetra-hedral geometry, formed by a monodentate carboxyl-ate group and three phenyl rings. The conformation is stabilized by an intra-molecular C-H⋯O hydrogen bond, which generates an S(5) ring. The aromatic ring of the 4-chloro-3-nitro-benzoate ligand makes dihedral angles of 75.

catena-Poly[[triphenyl-tin(IV)]-μ-5-amino-2-nitro-benzoato-κO:O].

The title compound, [Sn(C(6)H(5))(3)(C(7)H(5)N(2)O(4))](n), forms polymeric chains along [010]. The Sn(IV) ion is five-coordinated in a distorted trigonal-bipyramidal geometry by two monodentate carboxyl-ate groups and three phenyl rings. The axial sites are occupied by the O atoms of two symmetry-related carboxyl-ate groups [O-Sn-O = 170.

(2-Amino-3-nitro-benzoato-κO)triphenyl-tin(IV).

The asymmetric unit of the title compound, [Sn(C(6)H(5))(3)(C(7)H(5)N(2)O(4))], consists of two independent mol-ecules. In each mol-ecule, the four-coordinated Sn(IV) atom exists in a distorted tetra-hedral geometry and two intra-molecular N-H⋯O hydrogen bonds with S(6) ring motifs are present. In one mol-ecule, the benzene ring of the 2-amino-3-nitro-benzoate ligand makes dihedral angles of 42.

(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.

Bis(μ(2)-4-amino-3-nitro-benzoato)bis-(4-amino-3-nitro-benzoato)octa-butyldi-μ(3)-oxido-tetra-tin(IV).

The tetranuclear molecules of the title compound, [Sn(4)(C(4)H(9))(8)(C(7)H(5)N(2)O(4))(4)O(2)], reside on a crystallographic inversion center. Both the two independent Sn atoms are five-coordinate, with distorted trigonal-bipyramidal geometries. One Sn atom is coordinated by two O atoms of the carboxyl-ate anions, one bridging O atom and two butyl groups and the other Sn atom is coordinated by an O atom of the carboxyl-ate anion, two bridging O atoms and two butyl groups.