Title: An infrared study of hydroboration of lower olefins with diborane on $gamma;-Al2O3
Abstract: The hydroboration of ethylene and propylene as lower olefins with diborane on γ-Al2O3 was investigated by an infrared spectroscopic method. It has been confirmed that diborane is dissociatively adsorbed on the alumina and that the hydroboration proceeds by the collision of ethylene and propylene with the diborane thus adsorbed. This is compatible with the results of previous kinetic investigations. Two kinds of the adsorbed states of diborane, (I) and (II), may be considered to occur, and the bridge structure (I) is more reactive than (II) in the process of hydroboration. The mechanism of hydroboration was considered. The triethyl or tripropyl boron adsorbed on the alumina is stable, so that it remains unchanged under vacuum at 80 °C and is not affected by oxygen, although the vapor of the alkyl borons is easily attacked.
Publication Year: 1977
Publication Date: 1977-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 7
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