Photoelectron spectroscopy of the CH[sub 3]N[sup [minus]] ion
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215 (United States)
- Department of Chemistry, University of Oregon, Eugene, Oregon 97403 (United States)
We have observed the negative ion photoelectron spectrum of the methylnitrene ion, CH[sub 3]N[sup [minus]], and measured the electron affinity of methylnitrene, EA(CH[sub 3]N)=0.022[plus minus]0.009 hthinsp;eV. In addition to detaching the methylnitrene anion to the ground state of CH[sub 3]N([tilde X] hthinsp;[sup 3]A[sub 2]), we also detect the first electronically excited state of methylnitrene, [tilde a] hthinsp;[sup 1]E. We measure the singlet/triplet splitting to be [Delta]E([tilde a] hthinsp;[sup 1]E[minus][tilde X] hthinsp;[sup 3]A[sub 2])=1.352[plus minus]0.011 hthinsp;eV. The photoelectron spectrum of CH[sub 3]N [tilde a] hthinsp;[sup 1]E contains relatively sharp vibronic structure. Unlike the spectra from H[sub 2]CC[sup [minus]], the photoelectron spectra for CH[sub 3]N[sup [minus]] show no evidence for a barrier separating the rearrangement of singlet methylnitrene to methyleneimine, [sup 1][CH[sub 3]N] hthinsp;[r arrow] hthinsp;CH[sub 2][double bond]NH. [copyright] [ital 1999 American Institute of Physics.]
- OSTI ID:
- 6371083
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Vol. 111:12; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
AFFINITY
ANIONS
CHARGED PARTICLES
ELECTRON SPECTROSCOPY
ELECTRONEGATIVITY
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITED STATES
GROUND STATES
IONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
SPECTROSCOPY