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Circulardichroismus einiger A‐nor‐Steroide und verwandter Verbindungen
Author(s) -
Snatzke G.,
Lábler L.,
Tamm Ch.
Publication year - 1972
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19720550314
Subject(s) - chemistry , conjugated system , sign (mathematics) , circular dichroism , stereochemistry , epoxy , cotton effect , crystallography , organic chemistry , polymer , mathematical analysis , mathematics
The Circular Dichroism (CD.) of several saturated and conjugated keto‐A‐nor‐steroids follows the known rules. Homochiral α,β‐epoxy‐cyclopentanones and ‐cyclohexanones give the same sign of the Cotton effect within the R ‐band, whereas the K ‐band CD. of the former has opposite sign to that at 300 nm. More examples for the application of the rule for the determination of the CD. of non‐coplanar conjugated lactones as well as α,β‐epoxy‐lactones are presented.