title: N'-[(E)-4-Bromo-benzyl-idene]-2-(4-isobutyl-phen-yl)propanohydrazide.
abstract: The asymmetric unit of the title compound, C(20)H(23)BrN(2)O, contains two independent mol-ecules (A and B), in which the orientations of the 4-isobutyl-phenyl units are different. The dihedral angle between the two benzene rings is 88.45 (8)° in mol-ecule A and 89.87 (8)° in mol-ecule B. Mol-ecules A and B are linked by a C-H⋯N hydrogen bond. In the crystal, mol-ecules are linked into chains running along the a axis by inter-molcular N-H⋯O and C-H⋯O hydrogen bonds. The crystal structure is further stabilized by C-H⋯π inter-actions. The presence of pseudosymmetry in the structure suggests the higher symmetry space group Pbca. However, attempts to refine the structure in this space group resulted in a disorder model with high R (0.097) and wR (0.257) values. The crystal studied was an inversion twin with a 0.595 (4):0.405 (4) domain ratio.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Ching Kheng
authors.initials: CK
authors.lastname: Quah
authors.forename: K V
authors.initials: KV
authors.lastname: Sujith
authors.forename: B
authors.initials: B
authors.lastname: Kalluraya