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http://dx.doi.org/10.5012/bkcs.2004.25.8.1231

Interconversion of Electronic Spin State of p-Substituted Arylketocarbene Reactions  

Sung, Dae-Dong (Department of Chemistry, Dong-A University)
Jeong, Jin-Hee (Department of Chemistry, Dong-A University)
Ryu, Zoon-Ha (Department of Chemistry, Dong-Eui University)
Chin, Won-Bae (Department of Physics, Dong-A University)
Lee, Ik-Choon (Department of Chemistry, Inha University)
Publication Information
Bulletin of the Korean Chemical Society / v.25, no.8, 2004 , pp. 1231-1237 More about this Journal
Abstract
Rate constants for photolytic reactions of p-substituted 2-diazopropiophenones were determined in acetonitrile. The reactions show a comparatively low value of activation energy and activation enthalpy to alkylcarbenes or other arylcarbenes. The transition state corresponds to the step of a new carbonyl bond formation. The high negative ρ -values are shown in Hammett plots. The kinetics results and EPR spectrum are in accord with a phenomenon that occurs in interconversion between singlet and triplet carbenes.
Keywords
Arylketocarbenes; Singlet-triplet interconversion; Photolytic rate constant;
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