Experimental and theoretical investigation of the UV spectrum and kinetics of the aminomethyl radical, CH2NH2

TL Jansen*, Trabjerg, S Rettrup, P Pagsberg, A Sillesen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

The aminomethyl radical was produced by the reaction F-. + CH3NH2 --> HF + (CH2NH2)-C-., which was initiated by pulse radiolysis of CH3NH2-SF6 mixtures. The ultraviolet absorption spectrum of CH2NH2 was recorded on a timescale of 2 mu s using a gated optical multichannel analyzer. The vibronic structure observed in the range 270-380 nm was analyzed by comparison with the results Of ab initio calculations. Kinetics of the self-reaction 2(.)CH(2)NH(2) --> products was studied by monitoring the transient absorption of (CH2NH2)-C-. at 319.5 nm. A value of k = 8.1 x 10(-11) cm(3) molecule(-1) s(-1) was derived from the observed second-order kinetics combined with an estimated yield of the radical. In the presence of oxygen the decay rate was found to increase in accordance with the reaction (CH2NH2)-C-. + O-2 --> products proceeding with a rate constant of 7.8(8) x 10(-11) cm(3) molecule(-1) s(-1).

Original languageEnglish
Pages (from-to)1054-1058
Number of pages5
JournalActa chemica scandinavica
Volume53
Issue number11
DOIs
Publication statusPublished - Nov-1999

Keywords

  • CONFIGURATION-INTERACTION CALCULATIONS
  • PHOTOELECTRON-SPECTROSCOPY
  • RATE CONSTANTS
  • CH2OH
  • TEMPERATURE
  • STATES
  • HEATS

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