Volume 251, 2024

Isomeric and rotational effects in the chemi-ionisation of 1,2-dibromoethene with metastable neon atoms

Abstract

The specific geometry of a molecule can have a pronounced influence on its chemical reactivity. However, experimental data on reactions of individual molecular isomers are still sparse because they are often difficult to separate and frequently interconvert into one another under ambient conditions. Here, we employ a novel crossed-beam experiment featuring an electrostatically controlled molecular beam combined with a source for radicals and metastables to spatially separate the cis and trans stereoisomers as well as individual rotational states of 1,2-dibromoethene and study their specific reactivities in the chemi-ionisation reaction with excited neon atoms. The experiments reveal pronounced isomeric and rotational specificities in the rates and product branching ratios of the reaction. The present study underlines the importance and combined role of molecular geometry and of rotational motion in the dynamics of chemi-ionisation reactions.

Graphical abstract: Isomeric and rotational effects in the chemi-ionisation of 1,2-dibromoethene with metastable neon atoms

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Article information

Article type
Paper
Submitted
15 dec 2023
Accepted
31 jan 2024
First published
01 feb 2024
This article is Open Access
Creative Commons BY license

Faraday Discuss., 2024,251, 92-103

Isomeric and rotational effects in the chemi-ionisation of 1,2-dibromoethene with metastable neon atoms

A. Mishra, J. Kim, S. K. Kim and S. Willitsch, Faraday Discuss., 2024, 251, 92 DOI: 10.1039/D3FD00172E

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