catena-Poly[[triphenyltin(IV)]-μ-5-amino-2-nitrobenzoato-κ2 O 1:O 1′]

The title compound, [Sn(C6H5)3(C7H5N2O4)]n, forms polymeric chains along [010]. The SnIV ion is five-coordinated in a distorted trigonal–bipyramidal geometry by two monodentate carboxylate groups and three phenyl rings. The axial sites are occupied by the O atoms of two symmetry-related carboxylate groups [O—Sn—O = 170.88 (3)°]. The benzene ring of the 5-amino-2-nitrobenzoate ligand forms dihedral angles of 82.92 (6), 81.10 (6) and 83.54 (6)° with respect to the three phenyl rings. In the crystal, the chains are linked by intermolecular N—H⋯O and weak C—H⋯O interactions into a three-dimensional network. The crystal structure is further stabilized by weak intermolecular C—H⋯π interactions.

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 carboxylate groups and three phenyl rings. The axial sites are occupied by the O atoms of two symmetry-related carboxylate groups  ]. The benzene ring of the 5amino-2-nitrobenzoate ligand forms dihedral angles of 82.92 (6), 81.10 (6) and 83.54 (6) with respect to the three phenyl rings. In the crystal, the chains are linked by intermolecular N-HÁ Á ÁO and weak C-HÁ Á ÁO interactions into a three-dimensional network. The crystal structure is further stabilized by weak intermolecular C-HÁ Á Á interactions.

Related literature
For general background to and the coordination environment of triphenyltin(IV) carboxylate complexes, see: Yeap & Teoh (2003); Win et al. (2006Win et al. ( , 2008Win et al. ( , 2011a. For standard bondlength data, see: Allen et al. (1987). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).  et al., 2006; 2008; 2011a,b,c). In this study, the title complex is found to be similar to the reported structure of (2-amino-5nitrobenzoato)triphenyltin(IV) (Win et al., 2006) except that the amino group is substituted at meta-position and the nitro group is substituted at ortho-position to the benzoate group.

Refinement
Atoms H1N1 and H2N1 were located from the difference Fourier map and refined freely [N1-H = 0.852 (18) and 0.853 The remaining H atoms were positioned geometrically and refined using a riding model with C-H = 0.95 Å and U iso (H) = 1.2 U eq (C). The highest residual electron density peak is located at 0.67 Å from atom C25 and the deepest hole is located at 0.71 Å from atom Sn1. Fig. 1. The asymmetric unit of the title compound showing 50% probability displacement ellipsoids for non-H atoms.
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2sigma(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.