BROADBAND FTMW SPECTROSCOPY OF 2-METHYLIMIDAZOLE AND COMPLEXES WITH WATER AND ARGON

Medcraft, Chris

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https://hdl.handle.net/2142/97170 Copy

Description

Title

BROADBAND FTMW SPECTROSCOPY OF 2-METHYLIMIDAZOLE AND COMPLEXES WITH WATER AND ARGON

Author(s)

Medcraft, Chris

Contributor(s)

• Walker, Nick
• Mullaney, John C.
• Heitkämper, Juliane

Issue Date

6/20/2017

Keyword(s)

Large amplitude motions, internal rotation

Abstract

The rotational spectrum of 2-methylimidazole has been measured using laser ablation chirped-pulse Fourier transform microwave spectroscopy from 2-18.5 GHz. 2-methylimidazole was laser vaporised then entrained within an argon buffer gas undergoing supersonic expansion allowing for efficient rotational cooling. Carbon-13 and nitrogen-15 isotopologues were measured in natural abundance and substitution coordinates have been determined. The barrier to internal rotation of the methyl group was found to be 122.697(20) cm$^{-1}$. Nuclear quadropole coupling constants for the two nitrogen nuclei were determined via a rigid rotor fit of the $A$ internal rotor state. Complexes with water and argon were also observed and fit in a similar way.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/97170

DOI

10.15278/isms.2017.TI01

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