ZEKE SPECTROSCOPY OF GALLIUM-METHYLAMINE COMPLEXES: $Ga-NH_{n}(CH_{3})_{3-n} ({n} = 0-2)$
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Date
2003
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Publisher
Ohio State University
Abstract
Gallium-amine complexes were produced by reactions of gallium atoms and methylamines seeded in helium or argon carrier gases. The $Ga-NH_{n}(CH_{3})_{3-n}$ complexes have adiabatic ionization potentials of 39330, 38790, and $38081 cm^{-1}$ for $n = 2, 1$, and 0, respectively. The ZEKE spectrum of $Ga-NH_{2}CH_{3}$ exhibits 299 and 124 $cm^{-1}$ vibrations in the ionic state and a $93 cm^{-1}$ vibration in the neutral state. In the case of $Ga-NH(CH_{3})_{2}, 864, 331, 206$, and $132 cm^{-1}$ vibrations were measured for the ion, and 177 and $128 cm^{-1}$ vibrations for the neutral molecule. For $Ga-N(CH_{3})_{3}$, the spectrum displays ionic vibrations of 785, 462, 188, and $111 cm^{-1}$ and a neutral vibration of $133 cm^{-1}$. Assignments of the observed vibrations will be discussed in comparison with theoretical calculations.
Description
Author Institution: Department of Chemistry, University of Kentucky