Pyrolysis of 2‐phenylethylamines heats of formation of aminomethyl radicals R 2 NCH 2  · (R = H, CH 3 ) | Zendy

Grela M. A. | Zendy; Colussi A. J. | Zendy

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Pyrolysis of 2‐phenylethylamines heats of formation of aminomethyl radicals R 2 NCH 2 · (R = H, CH 3 )

Author(s) -

Grela M. A.,

Colussi A. J.

Publication year - 1985

Publication title -

international journal of chemical kinetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 68

eISSN - 1097-4601

pISSN - 0538-8066

DOI - 10.1002/kin.550170302

Subject(s) - chemistry , radical , ethylbenzene , pyrolysis , standard enthalpy of formation , alkyl , medicinal chemistry , kinetic energy , organic chemistry , benzene , physics , quantum mechanics

A kinetic study of the very low‐pressure pyrolysis of ethylbenzene (I), 2‐phenylethylamine (II), and N , N ‐dimethyl 2‐phenylethylamine (III)above 900 K yields the heats of formation of aminomethyl ( A ) and N , N ‐dimethylaminomethyl ( B ) radicals: Δ H ƒ, 300 K ( A ) = 30.3 and Δ H ƒ, 300 K ( B ) = 27.5 kcal/mol. The difference of stabilization energies E s , (relative to methyl radicals): Δ = E s ( B ) − E s ( A ) = (2 ± 1) kcal/mol, conforms to similar effects in methyl substituted alkyl and amino free radicals.

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