56252-57-4Relevant articles and documents
Hydrolysis of isobutylaluminum aryloxides studied by 1H NMR and quantum chemical methods
Faingol’d,Zharkov,Bravaya,Chernyak
, p. 1958 - 1965 (2017/04/03)
The results of 1H NMR and quantum chemical studies of hydrolysis of isobutylaluminum aryloxides are presented. According to the data of 1H NMR spectroscopy, the hydrolysis of monomeric diisobutylaluminum aryloxides (2,6-Bu2 t—C6H3O)AlBu2 i and (2,6-Bu2 t,4-Me—C6H2O)AlBu2 i occurs selectively at the Al—OAr bond to form the corresponding sterically bulky phenol and polyisobutylaluminoxane. At the molar ratios Al: H2O = 2, the formed sterically bulky phenol reacts slowly with diisobutylaluminum monoaryloxide to form isobutylaluminum diaryloxide. Dimeric aryloxide [(2-But—C6H4O)AlBu2 i]2 is not hydrolyzed under similar conditions. The quantum chemical calculations confirmed the experimental results: the hydrolysis at the Al—OAr bond has a lower energy barrier than that at the Al—C bond because of the formation of HH2O…OO?Ar hydrogen bonds.
Supported catalysts containing rhenium and aluminium, preparation thereof and use thereof for the metathesis of olefins
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, (2008/06/13)
The present invention concerns new catalysts based on compounds containing both rhenium and aluminum, which are deposited on an organic or inorganic support. The compounds of rhenium and aluminum correspond to the general formula: in which R is a hydr