Abstract
SEVENTEEN years ago, one of us1 suggested that the so-called γ4050 group observed in comets was due to the free methylene radical (CH2). This suggestion was not confirmed by later experiments2–4.
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References
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HERZBERG, G., SHOOSMITH, J. Spectrum and Structure of the Free Methylene Radical. Nature 183, 1801–1802 (1959). https://doi.org/10.1038/1831801a0
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DOI: https://doi.org/10.1038/1831801a0
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