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13 C NMR and 1 H NMR Study of Substituted Tricyclic [2+2] Photoadducts
Author(s) -
Lange Gordon L.,
Gottardo Christine
Publication year - 1996
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199609)34:9<660::aid-omr929>3.0.co;2-d
Subject(s) - chemistry , cyclobutane , carbon 13 nmr , chemical shift , adduct , substituent , carbon 13 nmr satellite , proton nmr , tricyclic , nmr spectra database , fluorine 19 nmr , stereochemistry , nuclear magnetic resonance spectroscopy , medicinal chemistry , ring (chemistry) , organic chemistry , spectral line , physics , astronomy
The 13 C NMR chemical shifts for a series of substituted tricyclo[5.3.0.0 2,6 ]decan‐3‐ones and tricyclo[5.4.0.0 2,6 ]undecan‐8‐ones derived from [2+2] 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 1 H NMR spectra for many of these adducts are also reported. These detailed assignments should assist organic photochemists in elucidating structures of new photoadducts.