C13 Nuclear Magnetic Resonance Spectroscopy. V. Nitrobenzene and Methylnitrobenzenes: Steric Inhibition of Conjugation
1963; American Institute of Physics; Volume: 38; Issue: 6 Linguagem: Inglês
10.1063/1.1733867
ISSN1520-9032
Autores Tópico(s)Chemical Reaction Mechanisms
ResumoThe C13 nuclear magnetic resonance spectra of nitrobenzene and nine methylnitrobenzenes have been obtained and analyzed. Steric inhibition of conjugation leads to marked increases in para carbon shieldings in the ortho methyl compounds. The observed shielding changes are in good agreement with those calculated from earlier theoretical and experimental studies of such inhibition and the dependence of para shieldings on π-electron densities established previously.
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