Isotopic Exchange Between Ethers and Deuterium on Metallic Catalysts

Journal Article · Mon Jun 01 04:00:00 EDT 1959 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j150576a607· OSTI ID:4254820

Forrest, Joan M.; Burwell, Robert L.

The oxygen atom of an ether blocks the propagation of the isotopic exchange reaction between an ether and deuterium on a rhodium, a palladium, and a nickel catalyst. For example, in one period of residence on the surface, the most exchanged product of propyl ether is C₃D₇OC₃H₇. A large pant of the rhodium surface is covered with ether adsorbed at the oxygen atom. This species does not lead to exchange and much reduces the rate of exchange of the ether. The presence of an ether markedly reduces the rate of exchange of alkanes introduced with or just after an ether. Sweeping the catalyst with hydrogen at reaction temperatures (usually 150 deg ) restores the original rate of alkane exchange. The presence of an ether alters the shape of the isotopic distribution pattern of heptane and probably that of cyclopentane. Isotopic distribution patterns are reported for propyl, isopropyl, ethyl butyl, methyl amyl, and methyl sec-butyl ether, tetrahydrofuran and dioxane.

• Research Organization: Northwestern Unov., Evanston, Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-016070
• OSTI ID: 4254820
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 6 Vol. 63; ISSN 0022-3654
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKANES
ATOMS
BUTYL RADICALS
CATALYSIS
CHEMICAL REACTIONS
CYCLOALKANES
DEUTERIUM
ETHERS
ETHYL RADICALS
HEPTANE
HYDROGEN
ISOTOPE EFFECTS
ISOTOPIC EXCHANGE
METHYL RADICALS
NICKEL
OXYGEN
PALLADIUM
PENTANE
PROPYL RADICALS
RHODIUM
SURFACES
TEMPERATURE