Differentiating geometric isomers by laser-ion beam photodissociation

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00284a011· OSTI ID:5051973

Krailler, R E; Russell, D H

The laser-ion beam photodissociation reactions of the cis-1,3-pentadiene and trans-1,3-pentadiene C/sub 5/H/sub 8//sup +/ ions and the cis,trans-2,4-hexadiene and trans,trans-2,4-hexadiene C/sub 6/H/sub 10//sup +/ ions have been investigated. The photodissociation spectra are found to agree qualitatively with the published ion cyclotron resonance (ICR) photodissociation data. Although the C/sub 5/H/sub 8//sup +/ and C/sub 6/H/sub 10//sup +/ geometric isomers exhibit indistinguishable photodissociation spectra and product ion branching ratios, the wavelength-dependent kinetic energy release values are unique for the individual isomers. The significant changes in the photofragment kinetic energy release values for the trans-1,3-pentadiene and trans,trans-2,4-hexadiene ions as a function of photon energy are attributed to isomerization of the photoexcited parent ion prior to dissociation. 28 references, 5 figures, 2 tables.

• Research Organization: Texas A and M Univ., College Station
• DOE Contract Number: AS05-82ER13023
• OSTI ID: 5051973
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:7; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
BEAMS
DATA
DIENES
ENERGY
EXPERIMENTAL DATA
GAS LASERS
HYDROCARBONS
INFORMATION
ION BEAMS
IONIZATION
ISOMERS
KINETIC ENERGY
LASERS
MASS SPECTROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
PENTADIENES
PHOTOIONIZATION
POLYENES
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS