Skip to main content

Selective UV Resonance Raman Excitation of Vinyl Group Vibrations in an Isomer of Crotyl Chloride

Buy Article:

$29.00 plus tax (Refund Policy)


The Raman spectra of cis, trans, and vinyl isomers of crotyl chloride (i.e., cis and trans 1-chloro-2-butene, and 3-chloro-1-butene) have been excited at 218 nm and at 231 nm. With 218-nm excitation the ethylenic mode belonging to the vinyl isomer is only modestly preresonance enhanced. On the other hand, the preresonance enhancement of the peaks belonging to the cis and trans isomers is very noticeable and nearly identical in energy to the peaks of cis and trans polybutadiene, which occur at 1655 and 1665 cm−1, respectively. However, with 231-nm excitation the vinyl-isomer ethylenic mode at 1633 cm−1 is very strongly enhanced, while the cis and trans isomer modes show no corresponding enhancement, but appear to decrease in relative intensity. Responsibility for the strong vinyl group enhancement is assigned to an electronic transition observed as a broad shoulder near 230 nm. By exciting at 231 nm it is possible to detect small amounts of the vinyl isomer in the presence of cis and trans crotyl chloride. Remarkably strong enhancement under 231-nm excitation has been noted as well for the first overtone of the vinyl ethylenic mode observed at 3263 cm−1.

Keywords: Isomers; UV resonance Raman; Vinyl

Document Type: Research Article


Affiliations: 1: Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881 2: BFGoodrich Company, Research and Development Center, 9921 Brecksville Road, Brecksville, Ohio 44141

Publication date: April 1, 1993

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more