D. Lynch, Stuart Chatwin, S. Parsons
Jun 1, 1999
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0
Influential Citations
11
Citations
Journal
Crystal Engineering
Abstract
Abstract 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 hydrogen-bonded 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 hydrogen-bond 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.