Journal of Physical Chemistry p. 3577 - 3581 (1982)
Update date:2022-08-11
Topics:
Frost, D. C.
Lau, W. M.
McDowell, C. A.
Westwood, N. P. C.
A combination of in situ He I photoelectron and quadrupole mass spectroscopy has been used to study monomeric nitrosomethane, the cis and trans isomers, and formaldoxime.In contrast to earlier results it is shown that cis-(CH3NO)2 sequentially gives CH2=NOH and CH3NO upon vaporization.A photoelectron spectrum of the cis dimer was not observed.In addition, a previous spectrum of "monomeric" CH3NO is shown to belong to the trans dimer.The assignments of the measured ionization potentials for these species are supported by semiempirical HAM/3 results.A breakdown of Koopmans' theorem is confirmed for CH3NO by a calculation involving perturbation corrections.
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