Helvetica Chimica Acta p. 2830 - 2840 (1981)
Update date:2022-08-25
Topics:
Hazell, Alan C.
Pagni, Richard M.
Persy, Gabriele
Rommel, Erika
Wirz, Jakob
Irradiation (λ>400 nm) of solid pleiadiene (1) yields a single, head-to-head <?4s+?4s>-photodimer (2) the structure of which was determined by X-ray analysis.The formation of 2 is entirely suppressed at 77 K, since properly oriented pairs of molecules arise only from thermal disorder in crystals of 1.Upon pyrolysis (80 deg), the strained photodimer 2 rearranges to the <?2s+?4s> dimer 3 by a 'forbidden' suprafacial <1,3>-C-atom migration.Both 2 and 3 are reconverted to 1 by UV. irradiation in solution, but the latter, 'forbidden' photoreaction is suppressed at 77 K.Discrepancies of the experimental observations with the predictive schemes of Kaupp or Michl are discussed.
View MoreContact:732.938.2777
Address:5012 Industrial Road Farmingdale, NJ 07727
Contact:+86-10-83993285
Address:Rm.1708, Haobai Tower, Building 6, No.50, North Road, West Third Ring, Haidian District, Beijing, China
ClickChem Technology Co., Limited
Contact:+86-0310-6519966/0531-52893837
Address:No.750 Shunhua Road, High-Tech Zone, Jinan city, Shandong China
website:http://www.apeptides.com/en/
Contact:+86-21-60871011
Address:No. 80 Chuanshan Shuyuan Steet,Pudong,Shanghai
ShangHai Original Economy-Trade Develop Co.,Ltd.,
Contact:86-21-68552131
Address:shanghai
Doi:10.1007/BF00673335
()Doi:10.1002/ejic.201301277
(2014)Doi:10.1016/j.redox.2020.101705
(2020)Doi:10.1002/ejoc.201601322
(2017)Doi:10.1002/chem.200500539
(2005)Doi:10.1002/poc.686
(2004)