(E)-Methyl N'-(4-bromo-benzyl-idene)-hydrazinecarboxyl-ate at 123 K.

The title compound, C(9)H(9)BrN(2)O(2), crystallizes with two independent but essentially identical mol-ecules in the asymmetric unit. Each mol-ecule adopts a trans configuration with respect to the C=N bond. In one of the mol-ecules, the dihedral angle between the benzene ring and the hydrazinecarboxylic acid plane is 24.9 (2)°, and that in the other mol-ecule is 16.1 (2)°. The mol-ecules are linked into a three-dimensional network via inter-molecular N-H⋯O, C-H⋯O, C-H⋯N and C-H⋯Br hydrogen bonds. An intramolecular N-H⋯O hydrogen bond is also present.