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Clathrate and inclusion compounds : part 13. Vibrational and NMR spectroscopic studies of carboxylic acid guests in urea.

Davies, J. Eric D. and Tabner, Vivienne A. (1998) Clathrate and inclusion compounds : part 13. Vibrational and NMR spectroscopic studies of carboxylic acid guests in urea. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 31 (2). pp. 99-107. ISSN 0923-0750

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Abstract

Infrared, Raman and solid state13C NMR spectra have been recorded for arange of inclusion compounds of urea containingstraight chain aliphatic carboxylic acids(butyric – decanoic) as guests. Inclusioncompounds are not formed with formic, acetic andpropionic acids. Thiourea does not forminclusion compounds with any of the C1 to C10acids. The vibrational and NMR data support theconclusion that the acids are present ashydrogen bonded dimers in the channels of thehost. The alkyl chain 13C chemical shiftvalues are very different from those of acidguests in the cavities formed in Dianin'scompound. These suggest that the alkyl chainsare present in the all-trans conformation,although weak bands observed in the spectrum ofthe decanoic acid inclusion compound lend somesupport to suggestions based on MM calculationsthat other conformations might be present.

Item Type: Article
Journal or Publication Title: Journal of Inclusion Phenomena and Macrocyclic Chemistry
Uncontrolled Keywords: IR spectroscopy - Raman spectroscopy - 13C MAS NMR spectroscopy - clathrates - inclusion compounds - carboxylic acids - urea - thiourea
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
Faculty of Health and Medicine > Biomedical & Life Sciences
Faculty of Arts & Social Sciences
ID Code: 21813
Deposited By: ep_ss_importer
Deposited On: 09 Feb 2009 09:36
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:52
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21813

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