Hydrogen bonds and weak X⋯π (X = C–H, π) interactions in a series of multi-component molecules constructed from 2-hydroxy-3-naphthoic acid with N-heterocycles are discussed in context.

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Hydrogen bonding patterns in a series of multi-component molecules constructed by tetrabromoterephthalic acid with N-heterocycles are discussed in this study.

Hydrogen-bonded directed assemblies of one binary co-crystal was validated by single-crystal X-ray diffraction analysis. The supramolecular reaction between symmetric fumaric acid and 1H-benzotriazole produced molecular co-crystal formulated as [(C 6 H 5 N 3)•(C 4 H 4 O 4) 0.5 ] in high yields. Compound contains fumaric acid/1H-benzotriazole in 3:2 ratios and displays a 3D (three-dimensional) H-bonded supramolecular structure. The predominant driving force in co-crystal is hydrogen bonds, by which the compound assemble into supramolecular organic framework. With the presence of the reliable hydrogen-bonding donor/acceptor(s) of fumaric acid, the crystalline lattice of co-crystal is managed by O-H•••N and N-H•••O to afford one-dimensional (1D) acid-base hydrogen-bonding tapes extending along the b axis direction, which are further extended to distinct 3D arrays via primary synthons (the corresponding N-H•••N and C-H•••O interactions). This structural study shows that fumaric acid is a supramolecular reagent that can produce well-defined supermolecule in very high yield.