photoaddition of biacetyl, a ketone having a visible absorbing chromophore, and a series of alkenes in benzene solution. Biacetylphosphorescencequenching and quantum yield data are consistent with a photoaddition mechanism involving biacetyl triplets. Exciplex and biradical intermediates are proposed for photoaddition on the basis of stereochemical results and the dependence of phosphorescencequenching constants
Dewar Benzene and Some of its Derivatives. A photoelectron spectroscopic analysis [1]
作者:Gerhard Bieri、Edgar Heilbronner、Tsunetoshi Kobayashi、Andreas Schmelzer、Melvin J. Goldstein、Ronald S. Leight、Mark S. Lipton
DOI:10.1002/hlca.19760590805
日期:1976.12.15
The near degeneracy of the two lowest ionization energies of Dewar benzene can be understood in terms of closely competitive ‘through-bond’ and ‘through-space’ interaction. Empirical, semiempirical, and open-shell ab initio procedures converge to require mutually consistent symmetry assignments.