Issue 14, 2008
From the journal:

Dalton Transactions

Characterization and reactivity of peralkylated LnIIAlIII heterobimetallic complexes†‡§

Hanne-Marthe Sommerfeldt,a   Christian Meermann,a   Marcus G. Schrems,a   Karl W. Törnroos,a   Nils Åge Frøystein,a   Robert J. Miller,b   Ernst-Wilhelm Scheidt,b   Wolfgang Schererb  and  Reiner Anwander*a  

* Corresponding authors

a Department of Chemistry, University of Bergen, Allégaten 41, Bergen, Norway
E-mail: reiner.anwander@kj.uib.no
Fax: +47 555 89490
Tel: +47 555 89491

b Institut für Physik, Universität Augsburg, Universitätsstraße 1, Augsburg, Germany
E-mail: wolfgang.scherer@physik.uni-augsburg.de
Fax: +49 821 5983227
Tel: +49 821 598 3350

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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Article information

DOI
https://doi.org/10.1039/B716603F
Article type
Paper
Submitted
30 Oct 2007
Accepted
15 Jan 2008
First published
26 Feb 2008

Dalton Trans., 2008, 1899-1907

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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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