C-13 CP Mas NMR-Study OF A pHENYL Group Rotation int he Solid-State Using T (1-RHO), lineshape and 2D EXSY Measurements

Riddell, F.G and Bremner, M. and Strange, John H. (1994) C-13 CP Mas NMR-Study OF A pHENYL Group Rotation int he Solid-State Using T (1-RHO), lineshape and 2D EXSY Measurements. Magnetic Resonance in Chemistry, 32 (2). pp. 118-121. ISSN 0749-1581. (The full text of this publication is not available from this repository)

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Abstract

A combination of solid-state C-13 CP/MAS NMR methods was used to study the rates of rotation of the phenyl group in 3,5-dimethyl-1-phenylhex-1-yn-3-ol. The methods used were T1rho measurements, lineshape analysis and 2D exchange spectroscopy over the temperature range 219-284 K. The rates of rotation obtained from the lineshape and 2D EXSY methods give an energy of activation of 58.6 +/- 3.0 kJ mol-1. In good agreement with this, the T1rho measurements give an activation energy for the rotation of 58.7 +/- 3.6 kJ mol-1. The two sets of data are shown to be compatible, within experimental error, with a calculated value for the dipolar carbon-hydrogen interaction (B) from an assumed molecular geometry.

Item Type: Article
Uncontrolled keywords: 13C CP/MAS NMR; SOLID-STATE PHENYL GROUP ROTATION; T1P; LINESHAPE 2D EXSY
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts
Depositing User: P. Ogbuji
Date Deposited: 19 Jun 2009 15:53
Last Modified: 17 Apr 2014 09:00
Resource URI: http://kar.kent.ac.uk/id/eprint/19992 (The current URI for this page, for reference purposes)
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