4-Amino-N-(4,6-dimethyl­pyrimidin-2-yl)benzene­sulfonamide–benzoic acid (1/1)

The constituents of the title co-crystal, C(12)H(14)N(4)O(2)S·C(7)H(6)O(2), are connected by an eight-membered hetero-synthon {⋯NCNH⋯OCOH}, whereby the carb­oxy­lic acid forms donor and acceptor hydrogen bonds with a pyrimidine N atom and the adjacent amine, respectively. The dimeric aggregates thus formed are arranged in rows with their terminal NH(2) groups forming N—H⋯O hydrogen bonds with neighbouring aggregates to form a two-dimensional array in the ac plane with an overall T-shaped topology. Layers inter­digitate along the b axis being connected by C—H⋯O, C—H⋯π and π–π [centroid–centroid distance = 3.6316 (19) Å] inter­actions.