Five-membered ring rotations, pseudorotations, and hydrogen bond exchange dynamics in the solid state studied by NMR spectroscopy

Riddell, Frank G. and Cameron, Kenneth S. and Holmes, Susan A. and Strange, John H. (1997) Five-membered ring rotations, pseudorotations, and hydrogen bond exchange dynamics in the solid state studied by NMR spectroscopy. Journal of the American Chemical Society, 119 (32). pp. 7555-7560. ISSN 0002-7863. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1021/ja970851f

Abstract

C-13 CP/MAS NMR studies were carried out on trans-1,2-cyclopentanediol, on 4,4-dimethyl-trans-1,2-cyclopentanediol, and on sulfolane at variable temperatures. The spectra showed evidence of three dynamic solid-state processes: hydrogen bond exchange, ring pseudorotation, and whole molecule rotations about local C-2 axes. Fitting of T-1 rho data to calculated values of the C-13-H-1 dipolar interactions allowed differentiation between ring pseudorotations and whole molecule C-2 reorientations. Isotopic H-1/H-2 substitution demonstrated the existence of hydrogen bond exchange processes in the diols. Activation parameters for these processes were derived from both coalescence measurements and the T-1 rho measurements.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: T.J. Sango
Date Deposited: 18 May 2009 11:50
Last Modified: 17 Apr 2014 08:54
Resource URI: http://kar.kent.ac.uk/id/eprint/17909 (The current URI for this page, for reference purposes)
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