𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The rate constant for t-C4H9 → H + i-C4H8 and the thermodynamic parameters of t-C4H9

✍ Scribed by Carlos E. Canosa; Roger M. Marshall

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
565 KB
Volume
13
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The rate of the reverse reaction of the system
equation image
has been measured in the range of 584–604 K from a study of the azomethane sensitized pyrolysis of isobutane. Assuming the published value for the rate constant of recombination of t‐butyl we obtain
Combination with our published data for k~1~ permits the evaluation

We have modified a previously published structural model of t‐butyl by the inclusion of a barrier to free rotation of the methyl groups in order to calculate values of the entropy and enthalpy of t‐butyl as a function of temperature. Using standard data for H and for i‐C~4~H~8~ we obtain

We have obtained other, independent values of this quantity by a reworking of published data using our new calculations of the entropy and enthalpy of t‐butyl. There is substantial agreement between the different values with one exception, namely, that derived from published data on the equilibrium
which is significantly lower than the other values.

We conclude that the value
obtained from the present work and a reworking of published data which involves the use of experimental data on t‐butyl recombination is incompatible with the result based on iodination data.

📜 SIMILAR VOLUMES

The rate constant for H + i-C4H8 → t-C4H
The rate constant for H + i-C4H8 → t-C4H9 in the range of 298–563 K
✍ Carlos E. Canosa; Roger M. Marshall; Adrian Sheppard 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 304 KB 👁 1 views

## Abstract The overall rate constant for hydrogen‐atom addition to isobutene has been measured in the temperature range of 298–563 K in a flow discharge system coupled to a quadrupole mass spectrometer. Previously published results allow the determination of where the error limits are 95% confid

The absolute rate constant for the metat
The absolute rate constant for the metathesis t-C4H9• + DI → C4H9D + I• and the heat of formation of the t-butyl radical
✍ Michel Rossi; David M. Golden 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 419 KB 👁 1 views

The Arrhenius parameters for the title reaction have been measured in a very-low-pressure pyrolysis apparatus in the temperature range 644-722 K and are given by log kZ (A4-I. sec-I) = 9.68 -2.12/8, where 0 = 2.303RT in kcal/mol. Together with the published Arrhenius parameters for the reverse react

Arrhenius parameters for the reactions C
Arrhenius parameters for the reactions CH3. + C4H10 → CH4 + C4H9. and C2H5. + C4H10 → C2H6 + C4H9.
✍ P. D. Pacey; J. H. Purnell 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 468 KB 👁 1 views

Study of n-butane pyrolysis at high temperature in a flow system allows measurement of the sum of the rate constants of the initiation reactions (2) and of the Arrhenius parameters of the reactions Established data for kl/k2 allow estimation of kl for 951'K and this, with recent thermochemical da

Laser-induced kinetics: Arrhenius parame
Laser-induced kinetics: Arrhenius parameters for t-C4H9 + XI → i-C4H9X + I (X = H,D) and the Heat of Formation of the t-butyl radical
✍ M. J. Rossi; D. M. Golden 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 886 KB

The metathesis reaction of DI with t X4H9 generated by 351-nm photolysis of 2,2'-azoisopropane was studied in a low-pressure reactor (VLP@ Knudsen cell) in the temperature range of 302-411 K. The data obeyed the following Arrhenius relation when combined with recent data by Rossi and Golden gathered

The thermal unimolecular decompositions
The thermal unimolecular decompositions of C2H5Cl, i-C3H7Cl, and t-C4H9Cl
✍ Horst Heydtmann; Bernd Dill; Reinhard Jonas 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 313 KB

## Abstract The thermal decompositions of ethyl chloride, iso propyl chloride, and tertiary butyl chloride were studied in a static system in the pressure range of 0.1–300 torr. The following Arrhenius equations for the high‐pressure limit were obtained: equation image The pressure dependence of

Rates and equilibria in the reaction sys
Rates and equilibria in the reaction system Br + i-C4H10 ⇌ HBr + t-C4H9. The heat of formation of the t-butyl radical
✍ Tajmeri S. A. Islam; Sidney W. Benson 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 635 KB

The very low pressure reactor (VLPR) technique has been used to measure the bimolecular rate constant of the title reaction at 300 K. The rate constant is given by log k, (l/mol s) = (11.6 2 0.4) -(5.9 ? 0.6)/0 the equilibrium constant has also been measured at the same temperature and is given by K