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Peer-reviewedCC BYThe journal of physical chemistry. A

The Rotational Spectrum of 2-Furanyloxy Radical.

  1. 1Center for Astrophysics, Harvard & Smithsonian, Cambridge, Massachusetts02138, United States.
  2. 2JILA, University of Colorado Boulder and National Institute of Standards and Technology , Boulder, Colorado80309, United States.
  3. 3Department of Physics, University of Colorado Boulder, Boulder, Colorado80309, United States.

Abstract

We report the hyperfine-resolved rotational spectrum of gas-phase 2-furanyloxy radical (•O-C4H3O) in the 6-36 GHz frequency range recorded using cavity Fourier transform microwave spectroscopy. These observations have yielded a precisely determined set of rotational constants, electron spin-rotation parameters, and proton hyperfine coupling constants. Our results enable a quantitative comparison of the structural and electronic properties of 2-furanyloxy with those of phenoxy and other closely related radicals, providing detailed physical insights into these prototypical resonance-stabilized π systems. The accurate laboratory rest frequencies derived from our measurements enable the quantification of the gas-phase chemistry of 2-furanyloxy in both the laboratory and in space, where the oxidation of aromatic rings remains poorly understood.

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BibTeX
@article{changala2026rotational,
  title = {{The Rotational Spectrum of 2-Furanyloxy Radical.}},
  author = {P Bryan Changala and Michael C McCarthy},
  journal = {The journal of physical chemistry. A},
  year = {2026},
  month = sep,
  doi = {10.1021/acs.jpca.6c05049},
  url = {https://europepmc.org/article/MED/42917516},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - The Rotational Spectrum of 2-Furanyloxy Radical.
AU  - P Bryan Changala
AU  - Michael C McCarthy
PY  - 2026
DA  - 2026/09/01
JO  - The journal of physical chemistry. A
DO  - 10.1021/acs.jpca.6c05049
UR  - https://europepmc.org/article/MED/42917516
AB  - We report the hyperfine-resolved rotational spectrum of gas-phase 2-furanyloxy radical (•O-C4H3O) in the 6-36 GHz frequency range recorded using cavity Fourier transform microwave spectroscopy. These observations have yielded a precisely determined set of rotational constants, electron spin-rotation parameters, and proton hyperfine coupling constants. Our results enable a quantitative comparison of the structural and electronic properties of 2-furanyloxy with those of phenoxy and other closely related radicals, providing detailed physical insights into these prototypical resonance-stabilized π systems. The accurate laboratory rest frequencies derived from our measurements enable the quantification of the gas-phase chemistry of 2-furanyloxy in both the laboratory and in space, where the oxidation of aromatic rings remains poorly understood.
SN  - 1089-5639
SN  - 1520-5215
ER  -