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 currently available from this repository. You may be able to access a copy if URLs are provided)
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.
|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:||https://kar.kent.ac.uk/id/eprint/17909 (The current URI for this page, for reference purposes)|