Crystal structure and Hirshfeld surface analysis of N-{N-[amino-(di-methyl-amino)-meth-yl]carbamimido-yl}-3-bromo-benzene-sulfonamide.

The title compound, C(10)H(14)BrN(5)O(2)S, is the bromo-benzene-sulfonamide derivative of the type 2 diabetes drug metformin. The asymmetric unit contains two mol-ecules with almost identical conformations but a different orientation of the bromo-phenyl moiety. Both mol-ecules exhibit intra-molecular N-H⋯N and N-H⋯O hydrogen bonds. The mol-ecular packing features chain formation in the a-axis direction by alternating N-H⋯N and N-H⋯O inter-actions. In addition, ring motifs consisting of four mol-ecules and π-π inter-actions between the phenyl rings contribute to the three-dimensional architecture. A Hirshfeld surface analysis shows that the largest contributions to surface contacts arise from contacts in which H atoms are involved.