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The Addition of tert-Butyl (Me3Ċ) and (tert-Butoxy)carbonylmethyl (Me3CO2CĊH2) radicals to alkynes in solution studied by ESR spectroscopy

✍ Scribed by Herbert Rubin; Hanns Fischer

Publisher: John Wiley and Sons
Year: 1996
Tongue: German
Weight: 686 KB
Volume: 79
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19960790617

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✦ Synopsis

All arrangements and procedures for steady-state and time-resolved ESR were as described in [4]. The radicals Me,C and Me3C02CCH, were generated by photolysis of the corresponding disubstituted ketones. These undergo type-I cleavage from a short-lived triplet state followed by a fast decarbonylation of the alkyl-radical fragment [4a, el. h v R,CO+ R-CO + R+ CO + 2 R

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The formation of (CH3)3Ċ, H2ĊC(Me)2OH and ĊH3 radicals in the radiolysis of aqueous t-butyl alcohol: on the solvation of t-butyl alcohol by water

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Esppsure of aqueous glassy solutions of f-butyl alcohol to 6oCo vlays at 77°K gave ESR spectra characteristic of h!e& and H2CC(hfe)20H radicals. The results for the former were unusual in fh?t, for very dilute aqueous solutions and for solutions of 0.4 mole fraction through to the pure alcohol, all