Applicability of our theory for the phenomena of fragment ionization processes to large molecules and to the effect of configuration of the molecules was studied.Two kinds of propanols and four kinds of butanols were treated for the above purpose. It was clearly found that the differences of the mass spectra by different configurations of the molecules are well interpreted by our interpretation including the molecular orbital treatment. Therefore,it is clear that the mass spectra by electron

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... act may be also predicted by molecular orbital assign ment in various occupied molecular orbitals.