(E)-1-(4-Bromophenyl)ethan-1-one semicarbazone

In the title compound, C(9)H(10)BrN(3)O, the hydrazone portion and aliphatic chain are essentially coplanar [maximum deviation 0.057 (15) angstrom] and the mean plane makes a dihedral angle of 70.9 (6)degrees with the benzene ring. The main feature of the crystal structure is the intermolecular N-H center dot center dot center dot O hydrogen bond, which links molecules into zigzag chains along the a axis. These chains are further stacked along the b axis. The crystal structure features non-classical intermolecular C-H center dot center dot center dot O interactions. The crystal studied was a nonmerohedral twin, with a twin ratio of 0.505 (1): 0.495 (1).