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DOI: 10.1039/A604292I (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 637-642

Methyl–hydride metathesis between [Zr(cp)2Me2] and [HAl(µ3-NBut)]4: molecular structures of [Me1-xHxAl(µ 3-NBut)]4 (x = 0, 0.78 or 1) and [(cp)2ZrMe(µ-H)]2 (cp = η5-C5H5) [hair space]

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C. Jeff Harlan, Simon G. Bott and Andrew R. Barron

Abstract

The reaction of [Zr(cp)2Me2] (cp = η5-C5H5) with the cubane iminoalane, [HAl(µ3-NBut)]4, yielded [(cp)2ZrMe(µ-H)]2 and the alkyl-substituted iminoalanes [Al4MeH3(µ3-NBut)4 ] 1 and [Al4Me2H2(µ3-NBut )4] 2. The dimer [(cp)2ZrMe(µ-H)]2 decomposes above 60 °C. The methyl–hydride exchange is first order with respect to each reactant concentration, and ΔH[hair space]‡ and ΔS[hair space]‡ have been determined as 104(1) kJ mol-1 and 18.8(4) J K-1 mol-1, respectively. The molecular structures of [(cp)2ZrMe(µ-H)]2, [HAl(µ3-NBut)]4, [MeAl(µ3-NBut)]4 and a cocrystallization disorder of compounds 1, 2 and [HAl(µ3-NBut)]4 have been determined by X-ray crystallography.

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