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 intersystem crossing to ground state triplet 7. It has also been shown by an
已经表明,萘环丙烷8的热解通过旋转环的开环产生单峰的1,8-萘醌二甲烷7。在流体溶液中,单线态双自由基优选环闭合以再生原料,而不是在1,2-氢转移下生成苯并(9)。已经证明,单重态7不与O 2反应或经历系统间相交至基态三重态7。一组复杂的实验还表明,三重态7在8的光解作用下产生,并且与O 2反应。不幸的是,不可能明确阐明三重态7与O 2反应的机理。