Xingjun Gao, Huan Zhang, Xianhong Wen
Aug 5, 2015
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0
Influential Citations
12
Citations
Journal
Journal of Molecular Structure
Abstract
Abstract Studies concentrating on non-covalent interactions between the organic base of 2,6-diaminopyridine, and carboxylic acids have led to an increased understanding of the role 2,6-diaminopyridine in binding with carboxylic acid derivatives. Here anhydrous and hydrated multi-component organic acid-base salts of 2,6-diaminopyridine have been prepared with the carboxylic acids as nicotinic acid, o-chlorobenzoic acid, 1,3-benzodioxole-5-carboxylic acid, 3,5-dinitrosalicylic acid, 4-nitro-phthalic acid, 1,4-cyclohexanedicarboxylic acid, and butane-1,2,3,4-tetracarboxylic acid. The seven crystalline compounds were characterized by X-ray diffraction analysis, infrared (IR), melting point (mp), and elemental analysis. All structures adopted the hetero R22(8) supramolecular synthons. The supramolecular architectures bear extensive N H⋯N, O H⋯N, O H⋯O, N H⋯O, and CH⋯O associations as well as other nonbonding contacts as CH N, CH2 O, π–π, C–π, O–π, Cl–π, Cl O, and O O interactions. The role of weak and strong hydrogen bonding in the crystal packing is ascertained.