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Effect of methyl substituents on the NMR spectra of aromatic protons of some nitrobenzene derivatives
Author(s) -
Beltrame Paolo,
Carniti Paolo,
Lai Adolfo,
Viglino Paolo
Publication year - 1975
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270070914
Subject(s) - nitrobenzene , chemistry , chemical shift , coupling constant , nitro , proton , nmr spectra database , spectral line , medicinal chemistry , proton nmr , stereochemistry , organic chemistry , physics , alkyl , particle physics , quantum mechanics , astronomy , catalysis
Proton NMR spectra were recorded and analysed for 1‐bromo‐4‐nitrobenzene, 2‐bromo‐5‐nitroluene, 3‐bromo‐6‐nitrotoluene and 2‐bromo‐5‐nitro‐ p ‐xylene, as well as for the corresponding compounds having p ‐CH 3 C 6 H 4 S in place of Br. Chemical shifts and coupling constants generally agree with expected values; however, a deshielding effect of the methyl group on aromatic protons was observed in one case.