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Proton spin‐lattice relaxation studies. N ‐aryl‐1‐isoindolinones
Author(s) -
Khadim Mohammad A.,
Colebrook Lawrence D.,
Hall Laurance D.
Publication year - 1980
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570170406
Subject(s) - chemistry , normalization (sociology) , spin–lattice relaxation , relaxation (psychology) , proton , aryl , proton spin crisis , lattice (music) , computational chemistry , nuclear magnetic resonance , organic chemistry , quantum mechanics , physics , social psychology , alkyl , sociology , anthropology , acoustics , psychology
Proton spin‐lattice relaxation rates (R 1 values) have been measured, at 270 MHz, for a series of N ‐aryl isoindolinones. A normalization procedure has been used to enable comparison of R 1 values in different compounds by minimizing the effects on relaxation rates of changes in motional correlation times accompanying changes in substitution patterns. A substantial (4.3‐fold) dynamic range of R 1 values has been observed, and individual values have been correlated with the molecular environments of the nuclei. There is evidence for an interring relaxation process.