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Pyrolysis of 2-phenylethylamines heats of formation of aminomethyl radicals R2NCH2 · (R = H, CH3)

✍ Scribed by M. A. Grela; A. J. Colussi

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
410 KB
Volume
17
Category
Article
ISSN
0538-8066

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✦ Synopsis

A kinetic study of the very low-pressure pyrolysis of ethylbenzene (I), 2-phenylethylamine (II), and N,N-dimethyl 2-phenylethylamine (111)

(1)

(2)

(3)

above 900 K yields the heats of formation of aminomethyl ( A ) and N,N-dimethylaminomethyl ( B ) radicals: AHf,300K(A) = 30.3 and AHf300K(B) = 27.5 kcal/mol. The difference of stabilization energies E , (relative t o methyl radicals): A = E,(B 1 -E , ( A ) = (2 2 1) kcal/mol, conforms to similar effects in methyl substituted alkyl and amino free radicals.

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