Abstract
He*(2/sup 3/S) Penning ionization electron spectra (PIES) and He I photoelectron spectra of CO/sub 2/ HCHO, CH/sub 3/CHO, CH/sub 3/CH/sub 2/CHO, HCOOH, CH/sub 3/COOH, and CH/sub 3/CH/sub 2/COOH were measured with a transmission-corrected electron spectrometer. The relative band intensities in PIES were analyzed on the basis of ab initio MO calculations. It is found that an isolobal analogy holds for the relative reactivity of target molecular orbitals upon electrophilic attacks by metastable helium atoms. 31 references, 9 figures, 2 tables.
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