Knowledge Bank

Gallium-amine complexes were produced by reactions of gallium atoms and methylamines seeded in helium or argon carrier gases. The $Ga-NHn(CH3)3-n$ complexes have adiabatic ionization potentials of 39330, 38790, and $38081cm-1$ for $n=2,1$, and 0, respectively. The ZEKE spectrum of $Ga-NH2CH3$ exhibits 299 and 124 $cm-1$ vibrations in the ionic state and a $93cm-1$ vibration in the neutral state. In the case of $Ga-NH(CH3)2,864,331,206$, and $132cm-1$ vibrations were measured for the ion, and 177 and $128cm-1$ vibrations for the neutral molecule. For $Ga-N(CH3)3$, the spectrum displays ionic vibrations of 785, 462, 188, and $111cm-1$ and a neutral vibration of $133cm-1$. Assignments of the observed vibrations will be discussed in comparison with theoretical calculations.