Synthesis of the hitherto elusive formylphosphine (HCOPH2) in the interstellar medium – a molecule with an exotic phosphorus peptide bond

Robert Frigge; Cheng Zhu; Andrew M. Turner; Matthew J. Abplanalp; Bing-Jian Sun; Ya-Syuan Huang; Agnes H. H. Chang; Ralf I. Kaiser

doi:10.1039/C8CC04125C

Synthesis of the hitherto elusive formylphosphine (HCOPH₂) in the interstellar medium – a molecule with an exotic phosphorus peptide bond†

Robert Frigge,^ab Cheng Zhu,

^ab Andrew M. Turner,^ab Matthew J. Abplanalp,^ab Bing-Jian Sun,^c Ya-Syuan Huang,^c Agnes H. H. Chang

*^c and Ralf I. Kaiser

*^ab

Author affiliations

* Corresponding authors

^a W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
E-mail: ralfk@hawaii.edu

^b Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA

^c Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
E-mail: 410412025@gms.ndlhu.edu.tw

Abstract

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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DOI: https://doi.org/10.1039/C8CC04125C
Article type: Communication
Submitted: 24 May 2018
Accepted: 31 Jul 2018
First published: 22 Aug 2018

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Chem. Commun., 2018,54, 10152-10155

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Synthesis of the hitherto elusive formylphosphine (HCOPH₂) in the interstellar medium – a molecule with an exotic phosphorus peptide bond

R. Frigge, C. Zhu, A. M. Turner, M. J. Abplanalp, B. Sun, Y. Huang, A. H. H. Chang and R. I. Kaiser, Chem. Commun., 2018, 54, 10152 DOI: 10.1039/C8CC04125C

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Chemical Communications

Synthesis of the hitherto elusive formylphosphine (HCOPH₂) in the interstellar medium – a molecule with an exotic phosphorus peptide bond†

Abstract

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Synthesis of the hitherto elusive formylphosphine (HCOPH₂) in the interstellar medium – a molecule with an exotic phosphorus peptide bond

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