In:
The Journal of Chemical Physics, AIP Publishing, Vol. 22, No. 1 ( 1954-01-01), p. 28-35
Abstract:
The kinetics of the gas phase photochemical bromination of isobutane to yield 2-bromo 2-methylpropane was investigated in the temperature range 40—95°C and the reaction found to proceed through an atom and radical chain mechanism analogous to that observed with a number of other hydrocarbons. The thermal reaction was studied at 112 and 130°C and shown to have the same mechanism except for the mode of production of bromine atoms. Bromination was inhibited by hydrogen bromide, a product of the reaction, and also by oxygen. The dissociation energy of the tertiary C–H bond in isobutane was found to be 89.6 kcal/mole at 0°K, in agreement with the idea that tertiary bonds are considerably weaker than primary bonds. A general review of activation energies of bimolecular reactions involved in bromination is given as well as a recapitulation of values of C–H and C–C bond dissociation energies derived from bromination studies.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1954
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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