Designing polymeric hydrogen-bonded networks using 4,4-dipyridyl and aromatic carboxylic acids containing N–H substituents
✍ Scribed by Daniel E. Lynch; Stuart Chatwin; Simon Parsons
- Book ID
- 104432247
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 157 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1463-0184
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✦ Synopsis
Three adduct structures of 4,4-dipyridyl (4,4-DP) have been prepared and studied using single-crystal X-ray techniques. These are indole-2-carboxylic acid [(4,4-DP)(ICA) 2 ] 1, 3-aminobenzoic acid [(4,4-DP)(3-ABA)] 2, and 4-aminobenzoic acid [(4,4-DP)(4-ABA)] 3. The structures have an increasing degree of complexity in the overall hydrogen-bonding network. The structure of 1 comprises polymeric hydrogen-bonded chains of associated 4,4-DP and ICA molecules which propagate through a complementary site on the ICA molecules. The structure of 2 consists of two parallel polymeric hydrogenbonded chains, each involving associated 4,4-DP and 3-ABA molecules, which cross-link through complementary 3-ABA sites. The structure of 3 is an extensive 3-dimensional hydrogen-bonded network involving all hydrogenbond donor and acceptor sites on the constituent molecules. In each case the positions and directions of the N-H groups are important in determining the eventual lattice network.