The crystal structure of ((cyclohexylamino){(Z)-2-[(E)-5-methoxy-3-nitro-2-oxidobenzylidene-κO]hydrazin-1-ylidene-κN 2}methanethiolato-κS)(dimethyl sulfoxide-κS)platinum(II): a supramolecular two-dimensional network

The title complex consists of a PtII atom coordinated in a square-planar environment by a dimethyl sulfoxide molecule and a thiosemicarbazone ligand. The overall conformation of the title complex is discussed and compared with related ligands. In the crystal, molecules are assembled via hydrogen bonds and C–H⋯π interactions forming a two-dimensional network.


Figure 2
A view of the hydrogen-bonded chain formed by N-HÁ Á ÁO and C-HÁ Á ÁN hydrogen bonds [dashed lines; symmetry code: (i) x, y À 1, z]. Hydrogen atoms not involved in these interactions have been omitted for clarity.

Figure 1
The molecular structure of complex I, with atom labelling and displacement ellipsoids drawn at the 50% probability level.

Synthesis and crystallization
The reaction scheme for the synthesis of complex I is given in Fig. 4. The ligand (E)-N-cyclohexyl-2-(2-hydroxy-5-methoxy-3-nitrobenzylidene)hydrazine-1-carbothioamide (0.71 g, 2.00 mmol) was dissolved in 20 ml of methanol. A 2 mmol solution of NaOH in 10 ml of methanol was added and the  Table 3 Selected geometrical parameters for I and related ligands (Å , ). Note: (a) MOKPOT crystallized with two independent molecules in the asymmetric unit.

Figure 4
Reaction scheme for the synthesis of the title complex.

Refinement
Crystal data, data collection and structure refinement details are summarized in Table 4. The N-bound H atom was located in a difference-Fourier map and freely refined. The C-bound H atoms were positioned geometrically (C-H = 0.93-0.98 Å ) and refined using a riding model with U iso (H) = 1.5U eq (Cmethyl) and 1.2U eq (C) for other C-bound H atoms.

Special details
Experimental. The following wavelength and cell were deduced by SADABS from the direction cosines etc. They are given here for emergency use only: CELL 0.71080 6.582 8.984 19.105 82.236 87.079 74.752 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.