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

Abstract

In the title compound, C<inf>9</inf>H<inf>10</inf>BrN<inf>3</inf>O, the hydrazone portion and aliphatic chain are essentially coplanar [maximum deviation 0.057 (15) Å] and the mean plane makes a dihedral angle of 70.9 (6)° with the benzene ring. The main feature of the crystal structure is the inter-molecular N - H?O hydrogen bond, which links mol-ecules into zigzag chains along the a axis. These chains are further stacked along the b axis. The crystal structure features non-classical inter-molecular C - H?O inter-actions. The crystal studied was a nonmerohedral twin, with a twin ratio of 0.505 (1):0.495 (1).