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Competition rate constants for addition of cyclohexyl radical to amide substituted alkenes: origins of acyclic stereoselection in radical additions

✍ Scribed by Ned A. Porter; Wen-Xue Wu; Andrew T. McPhail

Book ID
104214873
Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
290 KB
Volume
32
Category
Article
ISSN
0040-4039

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✦ Synopsis

Competttton rate constants were determmedfor the addmon of cyclohexyl radzcal to I@ umutwated am&s dertved from pyrrolrdme and trans_2~-~lmethylpyrrolldt~ The relattve rates can be understood by single crystal X-Ray analyses of the alkenes and an exammanon of the presumed transitton state

πŸ“œ SIMILAR VOLUMES

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✍ J. Q. Wu; H. Fischer πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 753 KB

Absolute rate constants and their temperature dependencies were determined for the addition of hydroxymethyl radicals ( C H 2 0 H ) to 20 monoor 1,l-disubstituted alkenes (CH2 = C X Y ) in methanol by time-resolved electron spin resonance spectroscopy. With the alkene substituents the rate constants

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Absolute rate constants for the addition of the 2-cyano-2-propyl radical to 26 alkenes CH2 = CXY at 315 K were determined in solution by time-resolved electron-spin-resonance spectroscopy. They vary with the alkene substituents from 30 M-' s-l to 7'010 M-' s-'. For styrene the temperature dependence

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✍ K. HΓ©berger; H. Fischer πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 432 KB πŸ‘ 1 views

Absolute rate constants for the addition of the 2-hydroxy-2-propyl radical to 18 substituted alkenes (CH2 = C X Y ) were determined at (296 -+ 1) Kin 2-propanol by time-resolved electronspin-resonance spectroscopy. With alkene substitution the rate constants vary by more than 6 orders of magnitude.