The oxidation of alkanes to stable carbonium ions by antimony pentafluoride
作者:
J. Lukas,
P. A. Kramer,
A. P. Kouwenhoven,
期刊:
Recueil des Travaux Chimiques des Pays‐Bas
(WILEY Available online 1973)
卷期:
Volume 92,
issue 1
页码: 44-54
ISSN:0165-0513
年代: 1973
DOI:10.1002/recl.19730920106
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractAntimony pentafluoride is a unique reagent for the formation of stable carbonium ions by oxidation of saturated hydrocarbons. The kinetic parameters for the abstraction of hydride ion from ethane and neopentane have been determined. Compared to the reactions with mixedBrönsted‐Lewisacid systems (HF‐SbF5, molar ratio ⩾5/1, and FSO3H‐SbF5, molar ratio 1/1), the analogous reactions with pure SbF5show considerably enhanced reaction rates. Moreover, neat SbF5is capable of removing the aldehydic proton from aldehydes to yield oxocarbonium ions. It is concluded that for hydride abstraction in the so‐called “magic acid” (FSO3H‐SbF5, molar ratio 1/1) a mechanism involving protonation to alkanonium ions is not the main
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