Crystal and molecular structures of twelve salts from isopropylamine and different organic acids

•Twelve organic salts have been prepared and structurally characterized.•The hydrogen bonds of the isopropylamine and organic acids have been ascertained.•The NH⋯O hydrogen bonds are the primary forces in these salts.•The secondary nonbonding interactions also play important role in structure propagation.

Twelve isopropylamine derived supramolecular complexes isopropylamine: (m-toluic acid) [(Hipa)+ ⋅ (mtua−), mtua− = m-toluate] (1), isopropylamine: (p-toluic acid) [(Hipa)+ ⋅ (ptua−), ptua− = p-toluate] (2), isopropylamine: (p-methoxybenzoic acid) [(Hipa)+ ⋅ (pmba−), pmba− = p-methoxybenzoate] (3), (isopropylamine): (3,4-methylenedioxybenzoic acid) [(Hipa)+ ⋅ (mba)−, mba = 3,4-methylenedioxybenzoate] (4), (isopropylamine): (2-methyl-2-phenoxypropanoic acid) [(Hipa)+ ⋅ (mpa−), mpa− = 2-methyl-2-phenoxypropionate] (5), (isopropylamine): (4-chlorophenoxyacetic acid) [(Hipa)+ ⋅ (cpa−), cpa− = 4-chlorophenoxyacetate] (6), (isopropylamine): (3,5-dinitrobenzoic acid) [(Hipa)+ ⋅ (dnba−), dnba− = 3,5-dinitrobenzoate] (7), (isopropylamine): (2-furoic acid) [(Hipa)+ ⋅ (fura−), fura− = 2-furoate] (8), (isopropylamine): (1-hydroxy-2-naphthoic acid) [(Hipa)+ ⋅ (hna), hna = 1-hydroxy-2-naphthoate] (9), (isopropylamine): (4-nitrophthalic acid) [(Hipa)2+ ⋅ (npa2−), npa2− = 4-nitrophthalate] (10), (isopropylamine)2: (2,5-bis-isopropylcarbamoyl-terephthalic acid): 2H2O [(Hipa)2+ ⋅ (bta2−) ⋅ 2H2O, bta2− = 2,5-bis-isopropylcarbamoyl-terephthalate] (11), and (isopropylamine)2: (1,5-naphthalenedisulfonic acid) [(Hipa)2+ ⋅ (nds2−), nds2− = 1,5-naphthalenedisulfonate] (12) were synthesized and structurally characterized by X-ray crystallography.All supramolecular architectures of 1–12 involve extensive classical hydrogen bonds as well as other non-covalent interactions. The results presented herein indicate that the strength and directionality of the NH⋯O, OH⋯O, and OH⋯S hydrogen bonds between the acidic components and isopropylamine are sufficient to bring about the formation of binary organic salts. The role of weak and strong non-covalent interactions in the crystal packing is ascertained. These weak interactions combined, the complexes 1–12 displayed 1D–3D framework structure.