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13 C n.m.r. spectra of steroids —a survey and commentary
Author(s) -
Blunt J. W.,
Stothers J. B.
Publication year - 1977
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.1270090802
Subject(s) - consistency (knowledge bases) , electromagnetic shielding , substituent , medical physics , spectral line , set (abstract data type) , series (stratigraphy) , computer science , medicine , physics , chemistry , stereochemistry , artificial intelligence , programming language , quantum mechanics , geology , paleontology
The literature on 13 C n.m.r. examinations of steroids has been reviewed and the shielding data for over 400 examples are tubulated. The assignments for each compound have been considered and, where necessary, revised in the light of more recent evidence and for consistency throughout each series. The methods available for assignments are reviewed and, in many cases, illustrated with specific examples. The major practical features concerning 13 C studies of steroids are discussed as a guide to the use of the technique. From the main body of shielding data, an extensive set of substituent effects has been generated to aid the examination of new systems. The utility and the limitations of these effects are described.