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13C NMR and 1H NMR Study of Substituted Tricyclic [2+2] Photoadducts

✍ Scribed by Gordon L. Lange; Christine Gottardo

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 539 KB
Volume: 34
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199609)34:9<660::aid-omr929>3.0.co;2-d

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✦ Synopsis

The "C NMR chemical shifts for a series of substituted tricycle[ 5.3.0.02.6] decan-3-ones and tricycle[ 5.4.0.02~6]undecan-8-ones derived from [ 2 + 21 photoaddition reactions are assigned and the influence of various substituents is discussed. In general, it was found that substituent shifts are less for cyclobutane carbons than carbons in five-or six-membered rings. The 'H NMR spectra for many of these adducts are also reported. These detailed assignments should assist organic photochemists in elucidating structures of new photoadducts.

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