A Comparison of Infrared Frequencies of 19-Nor Steroids and Their 19-Methyl Analogues
- 1 March 1962
- journal article
- research article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 16 (3) , 89-92
- https://doi.org/10.1366/000370262774415886
Abstract
The infrared absorption spectra of thirteen 19-nor steroids in the C-19 series were recorded by the potassium bromide dispersal technique It was found that a shift to higher frequencies occurred for the bands that have been correlated with structures in saturated 3-hydroxysteroids, 3α, 5α shifted from 998 to 1017 cm−1, 3β, 5α from 1042 to 1060 cm−1, 3α, 5β from 1035 to 1060 cm−1, and 3β 5β from 1033 to 1055 cm−1. A band near 881 cm−1 helped identify Δ4-19-nor structures, while a similar band near 885 and/or 825 cm−1 seemed characteristic for the Δ1-19-nor compoundKeywords
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