| Autor: |
Hockey EK; Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States., McLane N; Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, United States., Martí C; Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States., Duckett L; Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States., Osborn DL; Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States.; Department of Chemical Engineering, University of California, Davis, California 95616, United States., Dodson LG; Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States. |
| Abstrakt: |
Carbene species play an integral role in high-energy chemistry, transition-metal-carbene chemistry, catalysis, photolytic formation of carbohydrates, and possibly even the formation of interstellar sugars. In 1921, "reactive formaldehyde"─now known as hydroxymethylene (HCOH)─was first implicated as an intermediate in photocatalytic processes. However, due to its transient nature, direct observation of HCOH has predominantly been attained using cryogenic isolation methods. As a result, HCOH gas-phase reactivity measurements have been limited. We directly observed HCOH using photoionization spectroscopy following UV photodissociation of methanol. Our measurements show it reacts slowly with O 2 at room temperature. This work provides evidence for the formation mechanism of HCOH from CH 3 OH and its subsequent reactivity under gas-phase reaction conditions. |
