𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Kinetics of the gas phase reaction of methyl benzoate with bromine and iodine: The methoxyl CH bond strength of methyl esters

✍ Scribed by Richard K. Solly; Sidney W. Benson

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
650 KB
Volume
3
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

The gas phase reactions of PhCOOCH3 with IZ and Brz were studied spectrophotometrically in a static system over the temperature ranges 344-359O and 246-303", respectively. For each system the initial rate was first order in PhCOOCH3 and half order in halogen as the concentration of PhCOOCH3 was varied from 1.4 to 15.2 torr, that of 1 2 from 6.2 to 26.4 torr, and that of Brz from 3.0 to 13.6 torr. The rate-determining step is the extraction of a methoxyl hydrogen atom: PhCOOCH3 4-X'

PhCOOCH2 + H X Empirical assignment of A-factors for k l lead to log (k,/M-' sec-I) = (1 1.5 f 0.3) -(29.9 f 0.8)/8 for the Iz system, and to log (kl/M-l sec-l) = (1 1.3 f 0.3) -(14.6 i 0.8)/8 for the Br2 system, where 8 = 2.303RT in kcal/mole. Combined with the assumption that E-l = 1 f 1 kcal/mole and 2 f 1 kcal/mole for HI and HBr, respectively, DH& * This work was supported in part by Grant No.

📜 SIMILAR VOLUMES

Carbon–hydrogen bond strengths in methyl
Carbon–hydrogen bond strengths in methyl formate and the kinetics of the reaction with iodine
✍ Richard K. Solly; Sidney W. Benson 📂 Article 📅 1969 🏛 John Wiley and Sons 🌐 English ⚖ 507 KB

The gas phase reaction I, + HCOOCH, +HI + CH,I + CO, has been studied spectrophotometrically in a static system over the pressure ranges I, (6-39 torr) and HCOOMe (28-360 torr). In the temperature range 293-356', the initial rate of disappearance of I, is first order in [HCOOMe] and half-order in [I

Thermochemistry and kinetics of the reac
Thermochemistry and kinetics of the reaction of methyl mercaptan with iodine
✍ Lilian G. S. Shum; Sidney W. Benson 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 904 KB

The gas-phase reaction CH3SH + IZ has been studied spectrophotometrically over the temperature range of 476-604 K. It was found that the reaction undergoes H abstraction by I at 5575 K, leading to the formation of MeSI and followed by a secondary reaction which leads to the formation of MeSSMe: Tak

Kinetics of the gas-phase reaction CH3F
Kinetics of the gas-phase reaction CH3F + I2 ⇆ CH2FI + HI: The CH bond dissociation energy in methyl and methylene fluorides
✍ J. M. Pickard; A. S. Rodgers 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 374 KB

The kinetics of the gas-phase reaction of CH3F with 12 have been studied spectrophotometrically from 629 to 710 K, and were determined to be consistent with the following mechanism: (KIJ squares analysis of the kinetic data taken in the initial stages of reaction resulted in log k4 (M-w) = (11.3 f

Kinetics and thermochemistry of the gas
Kinetics and thermochemistry of the gas phase reaction of methyl ethyl ketone with iodine. I. The resonance energy of the methylacetonyl radical
✍ Richard K. Solly; David M. Golden; Sidney W. Benson 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 523 KB

## Abstract The gas phase reaction of iodine (2.8–43.3 torr) with methyl ethyl ketone (MEK) (7.4–303.4 torr) has been studied over the temperature range 280–355°C in a static system. The initial rate of disappearance of I~2~ is first order in MEK and half order in I~2~. The rate‐determining step is

Kinetic study of the gas-phase reaction
Kinetic study of the gas-phase reaction of the nitrate radical with methyl-substituted thiophenes
✍ B. Cabañas; P. Martín; S. Salgado; M. T. Baeza; J. Albaladejo; E. Martínez 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 104 KB

## Abstract The gas‐phase reactions of the NO~3~ radical with 2‐methylthiophene, 3‐methylthiophene, and 2,5‐dimethylthiophene have been studied, using relative and absolute methods at 298 K. Determination of relative rate was performed using Teflon collapsible bag as the reaction chamber and gas ch

An investigation of the gas-phase reacti
An investigation of the gas-phase reaction of atomic bromine with disilane: implications for the Si2H5H bond strength
✍ A. Goumri; W-J. Yuan; Luying Ding; Paul Marshall 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 388 KB

The rate constant for the reaction B~(~P)~P,+S~,H~ has been measured with the flash-photolysis resonance-fluorescence technique to be ( 1.35?0.12) x 10-'Oexp( -3.05 f0.3 kJ mol-'/RT) cm3 s-' over the temperature range 295-565 K. Theuncertainties represent ? lo in the Arrhenius parameters, while 95O/