Photofragment Spectroscopy of FeCH2 +, CoCH2 +, and NiCH2 + near the M+-CH2 Dissociation Threshold

John Husband, Fernando Aguirre, Christopher J. Thompson, Christopher M. Laperle, Ricardo B. Metz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (SciVal)


Photofragment spectra of jet-cooled MCH2 + (M = Fe, Co, Ni) have been measured. Our investigation of NiCH2 + represents the first reported spectroscopic study of this molecule. A spectroscopic threshold is observed for each of the three systems. In addition to imposing strict upper limits on the M+-CH2 bond strengths, these results further the discussion concerning the interpretation of spectroscopic thresholds as thermodynamic limits. The measured upper limits are: D 0(Fe+-CH2) ≤ 342 ± 2 kJ/mol, D 0(Co+-CH2) ≤ 331 ± 2 kJ/mol, and D 0(Ni+-CH2) ≤ 295 ± 5 kJ/mol. Three distinct, 2-nm-wide peaks are observed in the photofragment spectrum of CoCH2 +, but the spectra lack sharp structure above threshold.

Original languageEnglish
Pages (from-to)2020-2024
Number of pages5
JournalJournal of Physical Chemistry A
Issue number10
Publication statusPublished - Mar 16 2000

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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