Journal
CHEMICAL COMMUNICATIONS
Volume 54, Issue 72, Pages 10152-10155Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc04125c
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- NASA [NNX16AD27G]
- W. M. Keck Foundation
- NASA [NNX16AD27G, 906853] Funding Source: Federal RePORTER
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The formylphosphine (HCOPH2) molecule was detected in the gas phase via isomer selective photoionization reflectron time-of-flight mass spectrometry (PI-ReTOF-MS). Synthesized in carbon monoxide (CO)-phosphine ices (PH3) exposed to ionizing radiation, the formation mechanism involves an initial phosphorus-hydrogen bond rupture in phosphine yielding the phosphino radical (PH2) along with atomic hydrogen, addition of the suprathermal hydrogen atom to carbon monoxide leading to the formyl radical (HCO), and recombination of both radicals to formylphosphine (HCOPH2). This molecule represents the isovalent counterpart of the ubiquitous interstellar formamide (HCONH2). This study provides a fundamental framework to explore the synthesis and stability of the simplest isovalent counterpart of interstellar formamide (HCONH2) and suggests that formylphosphine (HCOPH2) should be detectable in the interstellar medium eventually providing a missing link between phosphorus-bearing complex organic molecules detected in the interstellar medium and on comet 67P/Churyumov-Gerasimenko.
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