| Abstract: | Vinyl alcohol 1 was prepared by thermolysis of cyclobutanol and its photoelectron spectrum was determined. I = 9.18 eV and I = 9.52 eV were found, the vibrations progression (? = 1400 cm?1) for this lowest energy transition 1(X)→1+(X?) indicating significant skeletal changes in the ion. The question of the relative stability of the syn ( 1  )- vs. anti-ions ( 1  ) is discussed in the light of theoretical calculations. The energy of the second π-state of 1 + is estimated at 13.6–14.1 eV above the ground state of 1 . |
