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Dynamic NMR: A new intensity ratio for evaluation of lifetime in paripartite A ⇌ B systems

✍ Scribed by Valentin S. Dimitrov

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 439 KB
Volume: 8
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270080306

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✦ Synopsis

Abstract

A simple formula for evaluation of rates of exchange in paripartite A ⇌ B systems is introduced. It is concerned only with the intensity ratio in a two‐site system in much the same way as that of Rogers and Woodbrey, but the new formula is also applicable above the coalescence point of the spectrum. The formula has been applied to the classical case of N,N‐dimethyltrichloroacetamide. An error analysis demonstrates that the approximations inherent in the derivation of the new formula lead to smaller errors than do those of Rogers and Woodbrey.

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Dynamic NMR: A single operational parame

Dynamic NMR: A single operational parameter approach for evaluation of lifetime in an uncoupled, equally populated AB system

✍ Valentin S. Dimitrov 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 English ⚖ 327 KB

## Abstract Two simple formulae involving only one variable are presented for the simple and rapid estimation of the mean lifetime (τ) of exchange in uncoupled, paripartite AB systems. These formulae are shown to provide τ values comparable to those obtained from total line‐shape analysis.