Abstract
It was demonstrated that systems based on Ni(II) compounds and the alkoxyhydride derivatives LiAlH(tert-BuO)3 and LiAlH2(tert-BuO)2, in contrast to LiAlH4, exhibit high catalytic activity in the reaction of styrene hydrogenation in the absence of activators. The inhibiting effect of an excess of LiAlH2(tert-BuO)2 was found. The analysis of the composition of reaction mixtures by NMR, EPR, and UV spectroscopy and TEM showed that side reactions of the conversion of aluminum-containing components occurred together with the formation of nickel nanoclusters. The most probable reaction schemes of LiAlH(tert-BuO)3 and LiAlH2(tert-BuO)2 disproportionation were proposed. The nature of the stabilizers of nickel nanoparticles was considered.
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