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Structural determinations from NMR relaxation contributions of exchangeable protons to carbon spin—lattice relaxation rates

✍ Scribed by Claudio Rossi; Maria Rosaria Sansoni; Alessandro Donati

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
216 KB
Volume
187
Category
Article
ISSN
0009-2614

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✦ Synopsis

The effect of isotopic proton-deuterium substitution of mobile protons on carbon spin-lattice relaxation rate is analyzed. The experimental results show that only carhonyl carbons are affected by the isotopic exchange and this is due to the fact that they follow a different relaxation pathway to proton-bonded carbons. Analysis of the differences in carbonyl carbon relaxation rates beforeand after isotopic exchange can be used to identify long distance contributionsdue to the presence of hydrogen bonds.

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