THE 235–500 GHZ ROTATIONAL SPECTRUM OF 1-CYANO-2-METHYLENECYCLOPROPANE (C₅H₅N)

Jean, Dairen R

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https://hdl.handle.net/2142/122510 Copy

Description

Title

THE 235–500 GHZ ROTATIONAL SPECTRUM OF 1-CYANO-2-METHYLENECYCLOPROPANE (C₅H₅N)

Author(s)

Jean, Dairen R

Contributor(s)

• McMahon, Robert J.
• Woods, R. Claude
• Esselman, Brian J.
• Kougias, Samuel M.
• Wood, Samuel A.

Issue Date

2023-06-21

Keyword(s)

Rotational structure/frequencies

Abstract

The gas-phase rotational spectrum of 1-cyano-2-methylencyclopropane (C₁, C₅H₅N), an isomer of pyridine first generated by the photoisomerization of (cyanomethylene)cyclopropane, has been synthesized by dehydration of its corresponding amide. Its rotational spectrum has been obtained from 235 GHz to 500 GHz and over 3600 a-, b-, and c-type transitions for the ground vibrational-state have been least-squares fit to partial octic, A- and S-reduced Hamiltonians with low statistical uncertainty (σfit = 42 kHz). Transitions for the two lowest-energy fundamentals (ν₂₇ and ν₂₆) and the lowest energy overtone (2ν₂₇) have been similarly least-squares fit to single state Hamiltonians. Many additional vibrationally excited states have been observed, which form a complex polyad of interacting states. The spectroscopic constants presented here form the foundation of future searches for 1-cyano-2-methylencyclopropane in the interstellar medium.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122510

DOI

https://doi.org/10.15278/isms.2023.6983

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