The carbon–hydrogen bond strength in dimethyl ether and some properties of iodomethyl methyl ether

✍ Scribed by F. R. Cruickshank; S. W. Benson

• Publisher: John Wiley and Sons
• Year: 1969
• Tongue: English
• Weight: 412 KB
• Volume: 1
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.550010404

✦ Synopsis

The kinetics and mechanism of the reaction between iodine and dimethyl ether (DME) have been studied spectrophotometrically from 51 5-630°K over the pressure ranges, I, 3.8-18.9 torr and D M E 39.6-592 torr in a static system. The rate-determining step is,

-1

where k l is given by log

CH,OCH,. + 1, CH,OCH,I(EI) + I.

-2

is give]? by log (kz/k-l) = -0.05 f 0.19 + (0.9 f 0.45)/8, whence the carbon-hydrogen bond dissociation energy, DH"(H-CH,OCH,)

= 93.3 f 1 kcal/mole. From this, AHfO(CH,OCH,) = -2.8 kcal and DH"(CH,-OCH,)

= 9.1 kcal/mole. Some nmr and uv spectral features of iodomethyl ether are reported.