Title

NMR Spectra of Cis and Trans 1,2- Difluoroethylene in the Gas Phase

Abstract

The proton NMR spectra of cis and trans 1,2‐difluoroethylene in the gas phase include a number of peaks of significantly different relative widths. The sharp peaks in the proton spectra can be associated with transitions between states with the largest singlet fluorine spin character if the spin—rotation interaction is assumed to provide the dominant fluorine relaxation mechanism. A comparison of the spectra in the gas and liquid phases then removes the usual ambiguity in the relative sign of JAA′ and JXX′ in these AA′XX′ systems. In both cis CHFCHF and trans CHFCHF, J HH and J FF are opposite in sign.

Publisher

AIP Publishing

Publication Date

1-1-2004

Publication Title

Journal of Chemical Physics

Department

Chemistry and Biochemistry

Document Type

Article

DOI

10.1063/1.1733965

Language

English

Format

text

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