Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7810076 | Journal of Molecular Structure | 2013 | 8 Pages |
Abstract
Reactions between proton sponge 2,2â²-dipyridylamine and acidic synthons (2,4-dinitrobenzoic acid, 3,4-dinitrobenzoic acid and picronitric acid) afford three proton-transfer supramolecular ammonium salts, (2,4-dinitrobenzoate)â¯(2,2â²-dipyridylammonium) (1), (3,4-dinitrobenzoate)â¯(2,2â²-dipyridylammonium)â¯(H2O) (2) and (picrate)â¯(2,2â²-dipyridylammonium) (3), respectively. During solution crystallization, the proton transfers from the organic acid to the nitrogen atom in the pyridyl ring. It is found that monoprotonated dpaH+ has an asymmetrical intramolecular hydrogen bond (IHB) N-H+â¯N, which results in the intramolecular S(6) ring. All supramolecular architectures of 1-3 involve extensive classical hydrogen bonds and display a three-dimensional (3D) framework structure. Robust hydrogen bonding interactions generate various intermolecular ring motifs.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
Xue-Hua Ding, Yong-Hua Li, Shi Wang, Xing-Ao Li, Wei Huang,