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Rate and mechanism of thermal decomposition of 4-methyl-l-pentyne in a single-pulse shock tube

✍ Scribed by Wing Tsang

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
568 KB
Volume
2
Category
Article
ISSN
0538-8066

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✦ Synopsis

Dilute mixtures of 4-methyl-1 -pentyne have been pyrolyzed in a single-pulse shock tube. The decomposition process involves bond breaking : kn HC=C--CH2(i-C3H7) --+ HC=zC-<:H2.(propyny1) + i-C,H,as nr1I as a molecular reaction: HC=C-CH,(i-C,H,) % C,H4(allene) + C,H, . The rate parameters are: k B -k 31 --1013.1 exp (-29,67O/T) (sec-l) exp (-34,94O/T) (sec-') 1 100°K, 1.5-5 atm l'he heat offormation of propynyl radical is thus AHf3,,,, = 338 kJ mol-l (80.7 kcal mol-l).

'This leads to a propynyl resonance energy of 40 kJ mol-' (9.6 kcal mol-I).

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