Crystal structure and Hirshfeld surface analysis of N-{N-[amino­(di­methyl­amino)­meth­yl]carbamimido­yl}-3-bromo­benzene­sulfonamide

The title compound, C(10)H(14)BrN(5)O(2)S, is the bromo­benzene­sulfonamide derivative of the type 2 diabetes drug metformin. The asymmetric unit contains two mol­ecules with almost identical conformations but a different orientation of the bromo­phenyl moiety. Both mol­ecules exhibit intra­molecular N—H⋯N and N—H⋯O hydrogen bonds. The mol­ecular packing features chain formation in the a-axis direction by alternating N—H⋯N and N—H⋯O inter­actions. In addition, ring motifs consisting of four mol­ecules and π–π inter­actions 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.