The zirconocene dihydride-alane adducts ...



Title The zirconocene dihydride-alane adducts [(Cp')2ZrH(?-H)2]3Al and [(Cp')2ZrH(?-H)2]2AlH (Cp' = Me3SiC5H4)
Author(s) Nola Etkin, D. W. Stephan
Journal Organometallics
Date 1998
Volume 17
Issue 4
Start page 763
End page 765
Abstract Abstract: The reaction of (Me3SiC5H4)2ZrCl2 with excess LiAlH4 affords the product 5. The structural characterization of 5 reveals two types of aggregation of the (Me3SiC5H4)2ZrH2 and AlH3 fragments formulated as [(Me3SiC5H4)2ZrH(-H)2]3Al and [(Me3SiC5H4)2ZrH(-H)2]2AlH. In this Zr3Al aggregate, three zirconocene units form two hydrogen-atom bridges, each to a central aluminum atom, generating a pseudo-octahedral environment about the aluminum center. In each of the Zr2Al aggregates, two zirconocene fragments are bridged to a central aluminum center by two hydride atoms, yielding a distorted square-based pyramid geometry about Al. These results are presented and the implications considered.
DOI 10.1021/om970849x

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