Crystal structure of 1-[2-(4-nitrophenyl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol

Abstract

The title compound, C24H21N3O3, crystallizes with two unique but closely r.m.s. overlay fit = 0.215Å) comparable molecules (1 and 2) in the asymmetric unit of the triclinic unit cell. In molecule 1, the dihedral angles between the central imidazlole ring and the benzene-ring substituents are 42.51(9), 45.41(9) and 56.92(8)°, respectively. Comparable data for molecule 2 are 39.36(10), 34.45(11) and 60.34(8)°, respectively. The rings at the 2-positions carry p-nitro substituents that subtend dihedral angles of 12.9(4)° in molecule 1 and 11.7(4)° in molecule 2 to their respective benzene ring planes. The imidazole rings also have propan-2-ol substituents on the 1-N atoms, which adopt extended conformations for the N-C-C-C chains. In the crystal, classical O-H⋯N hydrogen bonds combine with C-H⋯O, C-H⋯N and C-H⋯π(ring) hydrogen bonds and stack the molecules along the a-axis direction.