µ-Dialkyl inner transition metal(III) tetra-alkylaluminates; the crystal and molecular structure of di-µ-methyl-(dimethylaluminium)biscyclopentadienylyttrium and -ytterbium
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 12,p. 425-426
- https://doi.org/10.1039/c39760000425
Abstract
The crystalline title compounds, [M(C5H5-η)2R2AlR2](R = Me and M = Sc, Gd, Dy, Ho, Er, Tm, or Yb; R = Et and M = Sc or Y), were obtained by reaction of [M(C5H5-η)2Cl]2 and Li[AlR4] in toluene; the presence of the double alkyl bridge between M and Al was established by 1H and 13C n.m.r. spectra of the Sc and Y compounds {[Y(C5H5-η)2Et2AlEt2], unlike the Sc analogue, is fluxional at room temperature showing rapid bridge and terminal Et exchange}, and single-crystal X-ray analysis for the Y and Yb tetramethylaluminates.Keywords
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