organic compounds
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In the crystal structure of the title compound, C5H5BrN2, molecules assemble via pairs of N—HN hydrogen bonds into inversion dimers using only the syn H atom on the amine group. These dimers then assemble further into two-dimensional layers via type I C—BrBr [BrBr = 3.693 (s6) Å] halogen bonding along the (102) plane.