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Issue 14, 2008
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Characterization and reactivity of peralkylated LnIIAlIII heterobimetallic complexes§

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Abstract

The heterobimetallic peralkylated complexes [Ln(AlR4)2]n (Ln = Sm, Yb; R = Me, Et) were synthesized by a silylamide elimination route from Ln[N(SiMe3)2]2(THF)2 and an excess of AlR3. The solid-state structure of [Sm(AlEt4)2]n is isomorphous to that of the ytterbium derivative. Polymeric [Yb(AlMe4)2]n was examined by 1H and 13C MAS NMR spectroscopy revealing the presence of distinct bridging methyl groups. The reaction of [Yb(AlMe4)2]n and 1,10-phenanthroline (Phen) afforded the monomeric donor adduct Yb(AlMe4)2(Phen), while the protonolysis reaction with 2 equiv. C5Me5H (HCp*) yielded a separated ion pair of composition [Cp*Yb(THF)4][AlMe4]. Single-crystal X-ray diffraction data are provided for both ytterbium(II) complexes. Solid-state magnetic measurements (SQUID) were performed on [Sm(AlMe4)2]n, [Sm(AlEt4)2]n, SmI2(THF)2 and Sm[N(SiMe3)2]2(THF)2 showing high effective magnetic moments 3.67µB < µeff < 4.43µB.

Graphical abstract: Characterization and reactivity of peralkylated LnIIAlIII heterobimetallic complexes

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Supplementary files

Article information


Submitted
30 Oct 2007
Accepted
15 Jan 2008
First published
26 Feb 2008

Dalton Trans., 2008, 1899-1907
Article type
Paper

Characterization and reactivity of peralkylated LnIIAlIII heterobimetallic complexes

H. Sommerfeldt, C. Meermann, M. G. Schrems, K. W. Törnroos, N. Å. Frøystein, R. J. Miller, E. Scheidt, W. Scherer and R. Anwander, Dalton Trans., 2008, 1899
DOI: 10.1039/B716603F

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