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|Title:||Co-crystallisation of 2,2′-dithiodibenzoic acid with the isomeric n-pyridinealdazines, n = 2, 3 and 4: Supramolecular polymers and the influence of steric factors upon aggregation patterns|
|Citation:||Broker, G.A., Bettens, R.P.A., Tiekink, E.R.T. (2008). Co-crystallisation of 2,2′-dithiodibenzoic acid with the isomeric n-pyridinealdazines, n = 2, 3 and 4: Supramolecular polymers and the influence of steric factors upon aggregation patterns. CrystEngComm 10 (7) : 879-887. ScholarBank@NUS Repository. https://doi.org/10.1039/b800797g|
|Abstract:||The structure of the 1:1 co-crystal formed between the dicarboxylic acid, 2,2′-dithiodibenzoic acid, and each of the isomeric 3- and 4-pyridinealdazines features a supramolecular zig-zag chain constructed about the O-Hacid⋯Npyridine synthon. By contrast, using the same experimental conditions, only a 2:3 co-crystal could be formed when the isomeric 2-pyridinealdazine was used. Here, a pentamer is found, stabilised by the O-Hacid⋯Npyridine synthon and these associate to form a supramolecular chain via C-H⋯π contacts. Theory shows no significant differences in the basicity of the pyridine-nitrogen atoms leading to the conclusion that it is the steric congestion related to the relative disposition of the 2-pyridine nitrogen that is responsible for the observed behaviour. © The Royal Society of Chemistry.|
|Appears in Collections:||Staff Publications|
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