Ionization potentials of heteroalkenes: A comparative study

International audienceMethanimine, methylenephosphine and methylenearsine have been prepared in the gas phase and the gaseous flow has been analyzed by spectroscopy. Photoelectron spectra have been recorded and we report here a comparative study on these spectra. This comparison has been extended to the corresponding derivatives with a triple bond: hydrogen cyanide and methylidynephosphine. Estimation by theoretical calculations of the ionization potentials of the unknown methylidynearsine has been proposed. Copyright © 2004 John Wiley & Sons, Ltd

First synthesis and characterization by mass spectrometry and UV-photoelectron spectroscopy of methylenearsane

International audienceIn a vacuum gas-solid reaction (VGSR; see scheme), the kinetically unstable methylenearsane was synthesized by dehydrohalogenation of gaseous chloromethylarsane on solid sodium carbonate and characterized in the gas phase by mass spectrometry and UV photoelectron spectroscopy. A new approach to theoretically evaluate ionization potentials is also demonstrated