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 compound.

Some Bands of Methyl Bromide in the Near Infrared under High Resolution*

D. H. Rank, H. D. Rix, and T. A. Wiggins
J. Opt. Soc. Am. 43(3) 157-162 (1953)

Massachusetts Institute of Technology Special Summer Program, “Technique and Applications of Infrared Spectroscopy,” August 8–19, 1960

J. Opt. Soc. Am. 50(3) 303_3-304 (1960)

Frequency converter implementing an optical analogue of the cosmological redshift

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Comparison of the frequencies of NH₃, CO₂, H₂O, N₂O, CO, and CH₄ as infrared calibration standards

Linda R. Brown and Robert A. Toth
J. Opt. Soc. Am. B 2(5) 842-856 (1985)

Infrared Band Assignments for the 2900 cm⁻¹ Region Methyl Group Vibrations in XC₆H₄COOCH₃, XC₆H₄CH₃, and XC₆H₄COCH₃ Molecules

Marie-Thèrèse Forel, Nelson Fuson, and Marie-Louise Josien
J. Opt. Soc. Am. 50(12) 1228-1231 (1960)