[2+ 4] Photocyclization between quinones and allenes via photoinduced electron transfer
K Maruyama, H Imahori
Index: Maruyama, Kazuhiro; Imahori, Hiroshi Journal of Organic Chemistry, 1989 , vol. 54, # 11 p. 2692 - 2702
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Citation Number: 16
Abstract
Conclusions The anomalous shift increments for these strained bicyclic and tricyclic alkenes arise from variations in the local paramagnetic anisotropy term. The sign and magnitude of the shifts can be analyzed in terms of joint electrostatic and magnetic perturbations. An empirical correlation between the shift increments and changes in carbon 2s population is noted. A simple Huckel-based model ac-
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