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Substituent effects on 1 H chemical shifts. I—complete 1 H chemical shift assignments of methyl‐substituted cyclic systems
Author(s) -
Fisher Julie,
Gradwell Michael J.
Publication year - 1992
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260300412
Subject(s) - chemistry , substituent , chemical shift , heteronuclear molecule , vicinal , resonance (particle physics) , stereochemistry , methyl group , group (periodic table) , crystallography , nuclear magnetic resonance spectroscopy , organic chemistry , atomic physics , physics
1 H chemical shift assignments are presented for 2‐methyladamantane, 2‐methylnorbornane ( endo and exo ) and 2‐methylnorbornene ( endo and exo ). Resonance assignment was achieved using a variety of 1D and 2D homo‐ and heteronuclear ( 1 H– 13 C) experiments. The methyl group‐induced substituent chemical shift (SCS) is derived and the SCS of protons vicinal to this group is discussed.