Photoelectron spectroscopy of the anions, CH3NH− and (CH3)2N− and the anion complexes, H−(CH3NH2) and (CH3)2N−[(CH3)2NH]

The photoelectron spectra of the negative ions, CH3NH− and (CH3)2N−, as well as the anion complexes, H−(CH3NH2) and (CH3)2N−[(CH3)2NH] have been measured. The adiabatic electron affinities of CH3NH and (CH3)2N were determined to be 0.432±0.015 and 0.504±0.030 eV, respectively. The vertical detachment energies of H−(CH3NH2) and (CH3)2N−[(CH3)2NH] were determined to be 1.157±0.025 and 1.1±0.1 eV, respectively, while the anion–neutral dissociation energies of H−(CH3NH2) and (CH3)2N−[(CH3)2NH] were found to be 0.40 and 0.6 eV, respectively. These species are compared with their unmethylated counterparts, NH2−, H−(NH3), and NH2−(NH3).