By H. Fischer (auth.), H. Fischer (eds.)
Free radicals, that are key intermediates in lots of thermal, photochemical and radiation approaches, are vital for a formal figuring out of basic normal methods and the winning improvement of natural syntheses. VolumeII/18 serves as a complement and extension to volume II/13 and covers expense constants and different kinetic information of loose radical reactions in beverages. in addition II/18 comprises new chapters on reactions of radicals in excited states and of carbenes, nitrenes and analogues. Species in aqueous recommendations for which different compilations can be found have been intentionally passed over as earlier than, and for a similar cause electron move equilibria of natural radicals weren't covered.
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4(3) · 107 M–1 s –1 91Khu2 ) R are alkyls derived by reaction of O· H with 2,4-dimethylglutaric acid. 3a Landolt-Börnstein New Series II/18D2 Ref. p. / add. ref. [C7H15O3] –– 2 (CH3)3COC(CH3)2O 2· –––– ➝ products Phot. 6 · 108 M–1 s –1 95Fan1 [C8H7O3] C(O)O2· 2 products Therm. of AIBN + p-tolualdehyde + O2 Inhibitor p-tolualdehyde [C8H10NO2] –– 2 (CH3)2NC6H4O 2· –––– ➝ products Rad. of 4-bromodimethylaniline + O2 KAS water [C8H13O6] –– 2 CH3C(O)OCH2CH2CH2CH(OC(O)CH3)O 2· –––– ➝ products Phot. 69 (10) Ea = 0 kJ · mol–1 92Khu4 [C8H13O6] –– 2 CH3O2C(CH2)3CH(CO2CH3)O 2· –––– ➝ products Therm.
3 and involve either H-atom abstraction, addition, or electron transfer. In the case of H-atom abstraction from organic compounds there is usually no doubt which H atom is the most reactive. , the tertiary, secondary, and primary hydrogens of an alkane or the hydrogen atoms activated by the C(O) and CO functions of an ester. Furthermore, it is not always possible to determine the relative importance of peroxyl radical addition and abstraction for the autoxidation of alkenes unless a product analysis has been performed.
N-propyl valerate 353 [C8H17O4] –– (CH3)3COOC(CH3)2CH2O 2· –––– ➝ products Phot. of DTBP + O2 KAS benzene 295(2) [C9H7O5] C(O)O2· 2 products CO2CH3 Therm. of AIBN + p-carbomethoxybenzaldehyde + O2 Inhibitor p-carbomethoxy- 333 benzaldehyde 338 343 353 [C9H9O4] –– 2 C6H5CH(O2CCH3)O 2· –––– ➝ products Phot. of DTBP + benzyl acetate + O2 KAS benzyl acetate 296 [C9H15O6] –– 2 CH3C(O)OCH2CH2CH2CH2CH(OC(O)CH3)O 2· –––– ➝ products Phot.