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Imidazole base was crystallized with different aromatic carboxylic acids 2,4-dihydroxybenzoic acid, 5-chlorosalicylic acid, and 1,8-naphthalic acid, affording three new binary molecular organic salts of [(C3H5N2+)·(C7H5O4−)] (1), [(C3H5N2+)·(C7H4O3Cl−)]−C7H5O3Cl (2), and [(C3H5N2+)−(C12H7O4−)] (3). Proton transfer occurs from the COOH of carboxylic acid to nitrogen of imidazole in all complexes...
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