Crystal structure and Hirshfeld surface analysis of [2-(1H-benzimidazol-2-yl-κN 3)aniline-κN]dichloridozinc(II) N,N-dimethylformamide monosolvate

The asymmetric unit of the title complex contains one independent neutral complex molecule, which consists of one zinc(II) ion, one bidentate ligand, and two chlorido ligands. The ligand consists of two moieties: benzimidazole and aniline. The Zn(II) ion adopts a distorted tetrahedral coordination geometry. A Hirshfeld surface analysis was performed to quantify the intermolecular interactions and help understand the overall packing nature of the title compound.


Figure 2
A packing view approximately along [101] of the title complex. Hydrogen atoms are omitted for clarity.

Figure 3
Supramolecular view along the b axis of the crystal structure of the title complex formed through C-HÁ Á Á, hydrogen-bonding, and other weak interactions.

Figure 1
A view of the title complex with the atom labeling and displacement ellipsoids drawn at the 40% level.

Synthesis and crystallization
A mixture of 2-(2-aminophenylbenzimidazole) (0.05 g, 0.14 mmol) and ZnCl 2 Á4H 2 O (0.125 g, 0.4 mmol) was dissolved in 5 ml of dimethylformamide (DMF) and then sealed in a   Teflon-lined autoclave and heated under autogenous pressure to 453 K for 2 d and then allow to cool to room temperature at the rate of 1 K per minute. The resulting solution was filtered and kept for slow evaporation. After one week, block-shaped colorless crystals suitable for single-crystal X-ray diffraction data collection were obtained.

[2-(1H-Benzimidazol-2-yl-κN 3 )aniline-κN]dichloridozinc(II) N,N-dimethylformamide monosolvate
Crystal data Special details 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.