Sensitive dependence of the hydrogen-bonded assemblies in cyanuric acid-4,4'-bipyridyl adducts on the solvent and the structure of the parent acid

Ranganathan, A. ; Pedireddi, V. R. ; Sanjayan, G. ; Ganesh, K. N. ; Rao, C. N. R. (2000) Sensitive dependence of the hydrogen-bonded assemblies in cyanuric acid-4,4'-bipyridyl adducts on the solvent and the structure of the parent acid Journal of Molecular Structure, 522 (1-3). pp. 87-94. ISSN 0022-2860

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00222...

Related URL: http://dx.doi.org/10.1016/S0022-2860(99)00356-7

Abstract

Cyanuric acid (CA) forms a 2:1 hydrogen-bonded adduct with 4,4'-bipyridyl (BP) when co-crystallized from a methanol solution and a 1:1 adduct from an aqueous solution. The sheet structure of the 2:1 adduct involves cyclic hydrogen bonds between the amide units of adjacent CA molecules and N-H...N bonds between CA and BP. The 1:1 adduct crystallized from water has a chain structure with single N-H...O hydrogen bonds between the adjacent CA molecules. The structures of these hydrogen-bonded assemblies bear a close resemblance to the structures of CA crystallized from the corresponding solvents. N-methylcyanuric acid (MCA) forms a chain structure with single N-H...O bonds between the adjacent MCA molecules. The 1:1 hydrogen-bonded adduct of MCA with BP, crystallized from methanol or water solution, retains the chain structure. The structural sensitivity of the hydrogen-bonded assemblies to the solvent of crystallization and the relation between the supramolecular assembly of the adduct and the parent structure of CA are noteworthy.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Supramolecular Chemistry; Hydrogen Bonds; Cyanuric Acid; Chain Structures; Crystal Engineering
ID Code:10780
Deposited On:09 Nov 2010 04:55
Last Modified:31 May 2011 09:44

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