N′-[(E)-4-Bromo­benzyl­idene]-2-(4-isobutyl­phen­yl)propanohydrazide

The asymmetric unit of the title compound, C(20)H(23)BrN(2)O, contains two independent mol­ecules (A and B), in which the orientations of the 4-isobutyl­phenyl units are different. The dihedral angle between the two benzene rings is 88.45 (8)° in mol­ecule A and 89.87 (8)° in mol­ecule B. Mol­ecules A and B are linked by a C—H⋯N hydrogen bond. In the crystal, mol­ecules are linked into chains running along the a axis by inter­molcular N—H⋯O and C—H⋯O hydrogen bonds. The crystal structure is further stabilized by C—H⋯π inter­actions. 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.