Resonance electron capture by the molecules of α- and β-C(14)-methoxy isomers of 10,12-dehydro-8,9-seco-8,9-dioxolappaconine and its oxo derivative


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Resumo

The formation of negative ions of some diterpene alkaloid molecules having conjugated πС=С and πС=О bonds in their structure by resonance electron capture has been studied. The mass spectra of these compounds are due to electron capture onto the lowest unoccupied molecular orbital (LUMO), which is π*-С=С or π*-С=О in nature. It has been found that the partial conversion of the test compound molecules into the enol form is possible on transferring into a gas phase; for this purpose, the appearance potentials of the ions (M–H) and (M–OCH3) have been compared with the calculated thermodynamic thresholds of their appearance in the keto and enol forms.

Sobre autores

D. Sainiev

Ufa Institute of Chemistry

Autor responsável pela correspondência
Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

E. Shafikova

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

M. Abdullin

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

E. Tsyrlina

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

S. Pshenichnyuk

Institute of Physics of Molecules and Crystals, Ufa Scientific Center

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 151, Ufa, 450075

V. Mavrodiev

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

I. Furlei

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

M. Yunusov

Ufa Institute of Chemistry

Email: elolek@anrb.ru
Rússia, pr. Oktyabrya 71, Ufa, 450054

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