The ionization potentials of methyl ethers of D-homoequilenine, its 14@-isomer, Dhomoestrone and its 8cc-isomer, as well as appearance potentials of certain fragment ions have been determined by means of electron-impact. The dissociation energies of the bonds which are split in the course of formation of these ions have been calculated.
The mass spectra of a number of the epimeric 1,2-dimethyl-4-alkyl-4-hydroxydecahydroquinolines (alkyl: C z C H , CH=CH,, C,H, and COCH,) have been studied. The configuration at C-2 and C-4 in these molecules is proposed on the basis of the data obtained. Some aspects of the fragmentation pathways under electron-impact are discussed.
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