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Effect of paramagnetic anions on cations possessing stereochemically non‐equivalent methylene groups
Author(s) -
Rosenthal Leslie,
Walker Ian M.,
Wiggins Don
Publication year - 1978
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.1270110704
Subject(s) - methylene , paramagnetism , chemistry , ion , group (periodic table) , computational chemistry , inorganic chemistry , medicinal chemistry , organic chemistry , physics , quantum mechanics
A series of cations based on substituted pyrrolidines and piperidines has been investigated by NMR in low dielectric solvents. Non‐equivalent cation methylene protons are selectively shifted by paramagnetic anions; the size of the shift depends directly on the ability of the anion to approach closely the group in question. The assignments resulting from the shift data have been compared with the work of other authors.