2-[(4-Hydroxyphenyl)iminomethyl]thiophene

Synthesis, characterization, crystal structure and theoretical study of a compound with benzodiazole ring: antimicrobial activity and DNA binding

2-(Thiophen-2-yl)-1-((thiophen-2-yl)methyl)-1H-1,3-benzodiazole (HL) is synthesized and characterized by elemental analysis, UV-Vis, FT-IR, (1)H, (13)C NMR, mass spectra, scanning electron microscope (SEM) and single crystal X-ray diffraction. The crystal structure is stabilized by intermolecular CH⋯N and CH⋯π interactions. The molecular structure is also optimized at the B3LYP/6-31G level using density functional theory (DFT). The structural parameters from the theory are nearer to those of crystal, the calculated total energy of coordination is -1522.814a.u. The energy of HOMO-LUMO and the energy gap are -0.20718, -0.04314, 0.16404a.u, respectively. All data obtained from the spectral studies support the structural properties of the compound HL. The benzimidazole ring is essentially planar. The in vitro biological screening effects of the synthesized compound is tested against four bacterial and four fungal strains by well diffusion method. Antioxidant property and DNA binding behaviour of the compound has been investigated using spectrophotometric method.

3-Chloro-4-(4-chloro-phen-oxy)-N-[(Z)-(5-nitro-thio-phen-2-yl)methyl-idene]aniline

In the title compound, C(17)H(10)Cl(2)N(2)O(3)S, the thio-phene ring and the central benzene ring are almost coplanar [dihedral angle = 8.44 (3)°], while the dihedral angle between the two benzene rings rings is 77.49 (9)°. The crystal packing is stabilized by inter-molecular C-H⋯O hydrogen bonds.

(2,6-Diisopropylphenyl)(2-thienylmethylene)amine

The title compound, C₁₇H₂₁NS, was prepared by the condensation of thio­phene-2-carbaldehyde with 2,6-diiso­propyl­aniline. It crystallizes with two mol­ecules in the asymmetric unit. The mol­ecules are inter­connected via a C—H⋯N hydrogen bond. The dihedral angles between the thio­phene and phenyl rings are 81.7 (7) and 85.5 (7)°.