The Kinetics of Intramolecular Reactions from Relaxation Time Measurements

Autor:	Joe W. Keepers, Ronald J. Nienhuis, Joseph B. Lambert
Rok vydání:	1981
Předmět:	Coalescence (physics) Dynamic range Chemistry Kinetics Relaxation (NMR) General Medicine General Chemistry Nuclear magnetic resonance spectroscopy Catalysis Standard line Saturation transfer Chemical physics Intramolecular force Physical chemistry
Zdroj:	Angewandte Chemie International Edition in English. 20:487-500
ISSN:	1521-3773 0570-0833
DOI:	10.1002/anie.198104873
Popis:	Analysis of spin-lattice relaxation (T1) provides alternatives to the standard line shape procedures for the investigation of intramolecular reactions; furthermore it expands the NMR range at both the high and the low energy barrier limits. Dipole-dipole- and quadrupole-relaxation times are sensitive to very rapid processes such as methyl rotation. Analysis of relaxation in the rotating frame(T1ρ) provides kinetics for many sorts of processes, particularly those in the dynamic range that is too rapid for line shape methods. Saturation transfer and the coalescence of relaxation times at high temperatures can be used to measure high energy barriers. The scope and limitations of these methods are described.
Databáze:	OpenAIRE
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