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Photochemistry with Circularly Polarized Light
Author(s) -
Buchardt Ole
Publication year - 1974
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.197401791
Subject(s) - circular polarization , circular dichroism , anisotropy , magnetic circular dichroism , molar absorptivity , x ray magnetic circular dichroism , optics , physics , extinction (optical mineralogy) , photochemistry , chemistry , crystallography , quantum mechanics , spectral line , microstrip
Abstract The reactions induced by circularly polarized light are reviewed and a general discussion of the induction of optical activity by circularly polarized light is presented. It is concluded that three different mechanisms, or their combinations, can cause asymmetric induction. In each case the optical yield is dependent on the optical anisotropy factor g, the ratio between the circular dichroism (Δϵ) and the extinction coefficient (ϵ). The results are discussed in terms of the presumed mechanisms, and particular attention is paid to the asymmetric synthesis of helicenes. It is concluded that this kind of photochemistry may have analytical importance.