Abstract
Nicotinamide crystallizes with 3-hydroxy-2-naphthoic acid and 4-aminobenzoic acid to give rise to cocrystal 1 and 2, respectively. Cocrystal 1, [C11H8O3][C6H6N2O], crystallizes in the monoclinic space group C2/c with a = 25.810(4), b = 4.8932(5), c = 23.869(4) Å, β = 107.078(8)º, V = 2881.6(7) Å3, Z = 8, C17H14N2O4, M r = 310.30, D c = 1.431 g/cm3. Cocrystal 2, [C7H7NO2][C6H6N2O]·H2O, crystallizes in the triclinic space group P-1 with a = 7.214(5), b = 7.326(5), c = 13.484(11) Å, α = 83.23(2), β = 77.189(18), γ = 80.35(2)º, V = 682.7(9) Å3, Z = 2, C13H15N3O4, M r = 277.28, D c = 1.349 g/cm3. Similar carboxylic acid···pyridine synthon R 22 (7) can be observed in the two cocrystals. In 1, amide of nicotinamide forms a C(4) chain from the anti H to its carbonyl oxygen. In 2, the amide forms a R 22 (8) homodimer which is linked into 2D layer by water molecule through different hydrogen-bonding interactions. The 3D hydrogen-bonded structure results from a synthon R 24 (8) from amide, water and amino group of 4-aminobenzoic acid.
Graphical Abstract
Nicotinamide crystallizes with 3-hydroxy-2-naphthoic acid and 4-aminobenzoic acid to give rise to cocrystal 1 and 2, respectively. Similar carboxylic acid···pyridine synthon R 22 (7) can be observed in the two cocrystals. In 1, amide of nicotinamide forms a C(4) chain from the anti H to its carbonyl oxygen. The syn H is accepted by hydroxyl oxygen of 3-hydroxy-2-naphthoic acid to form an infinite C 22 (12) chain. In 2, the amide forms a R 22 (8) homodimer which is linked into 2D layer by water molecule through different hydrogen-bonding interactions. The 3D hydrogen-bonded structure results from a synthon R 24 (8) from amide, water and amino group of 4-aminobenzoic acid.
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Acknowledgments
The work was supported by the Program for New Century Excellent Talents in Fujian Province University (JK2010043). S. Hu appreciates the grant from Undergraduate Innovative Research Program of Minjiang University (mjcxx1008).
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Lou, B., Hu, S. Different Hydrogen-Bonded Interactions in the Cocrystals of Nicotinamide with Two Aromatic Acids. J Chem Crystallogr 41, 1663–1668 (2011). https://doi.org/10.1007/s10870-011-0154-z
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DOI: https://doi.org/10.1007/s10870-011-0154-z