Low-Temperature Gas-Phase Formation of Methanimine (CH2NH; X1A')–the Simplest Imine–under Single-Collision Conditions

Yang, Zhenghai; Medvedkov, Iakov A.; Goettl, Shane J.; Kaiser, Ralf I.

doi:10.1021/acs.jpclett.3c02360

Title: Low-Temperature Gas-Phase Formation of Methanimine (CH₂NH; X¹A')–the Simplest Imine–under Single-Collision Conditions

Journal Article · Mon Sep 18 00:00:00 UTC 2023 · Journal of Physical Chemistry Letters

DOI: https://doi.org/10.1021/acs.jpclett.3c02360 · OSTI ID:2278904

Yang, Zhenghai ^[1]; Medvedkov, Iakov A. ^[2];

^[2];

^[2]

University of Hawaii at Manoa, Honolulu, HI (United States); University of Hawaii
University of Hawaii at Manoa, Honolulu, HI (United States)

The D1-methanimine molecule (CHDNH; X¹A') – the simplest (deuterated) imine – has been prepared through the elementary reaction of the D1-methylidyne (CD; X²Π) with ammonia (NH₃; X¹A₁) under single collision conditions. As a highly reactive species with a carbon-nitrogen double bond and a key building block of biomolecules like amino acids and nucleobases, methanimine is of particular significance in coupling the nitrogen and carbon chemistries in the interstellar medium and in hydrocarbon-rich atmospheres of planets and their moons. However, the underlying formation mechanisms of methanimine in these extreme environments are still elusive. Here, the directed, low-temperature gas-phase formation of D1-methanimine will deepen our fundamental understanding of low-temperature molecular growths processes via carbon-nitrogen bond coupling. Considering the recent detection of the interstellar D1-methylidyne radical, the investigation of the CD–NH₃ system also suggests a promising pathway for future astronomical observations of D1-methanimine as a molecular tracer of gas phase deuterium-enrichment in deep space.

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Research Organization:: University of Hawaii at Manoa, Honolulu, HI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-03ER15411

OSTI ID:: 2278904

Journal Information:: Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 38 Vol. 14; ISSN 1948-7185

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Ammonia
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Title: Low-Temperature Gas-Phase Formation of Methanimine (CH2NH; X1A')–the Simplest Imine–under Single-Collision Conditions

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Title: Low-Temperature Gas-Phase Formation of Methanimine (CH₂NH; X¹A')–the Simplest Imine–under Single-Collision Conditions