Wittig,G.; Schwarzenbach,K., Justus Liebigs Annalen der Chemie, 1961, vol. 650, p. 1 - 20
作者:Wittig,G.、Schwarzenbach,K.
DOI:——
日期:——
The behavior of the singlet and triplet spin states of methylene-bridged 1,8-naphthoquinodimethane with O2
作者:Richard M. Pagni、Michael N. Burnett、Hamdi M. Hassaneen
DOI:10.1016/0040-4020(82)80165-8
日期:1982.1
naphthocyclopropane 8 yields the singlet 1,8-naphthoquinodimethane 7 by disrotatory ring opening. In fluid solution the singlet biradical prefers to ring close to regenerate the starting material rather than under a 1,2-hydrogen shift to yield phenalene (9). It has been demonstrated that the singlet 7 does not react with O2 or undergo intersystemcrossing to ground state triplet 7. It has also been shown by an