A monomeric solvent-free bent lanthanide dialkyl and a lanthanide analogue of a Grignard reagent. Crystal structures of Yb[l brace]C(SiMe[sub 3])[sub 3][r brace][sub 2] and [Yb[l brace]C(SiMe[sub 3])[sub 3][r brace]I[center dot]OEt[sub 2]][sub 2]

There is much current interest in the organometallic chemistry of the f-block elements. Considerable progress has been made in developing the chemistry of the +3[sub la] and 0[sub lb] oxidation states: work on the +2 oxidation state has been mainly concerned with polyhapto ligands, especially substi...

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Bibliographic Details
Published in:Journal of the American Chemical Society 1994-12, Vol.116:26
Main Authors: Eaborn, C., Hitchcock, P.B., Izod, K., Smith, J.D.
Format: Article
Language:English
Subjects:
400102 > Chemical & Spectral Procedures
400201 > Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
AROMATICS
BENZENE
CHEMICAL BONDS
COHERENT SCATTERING
DIFFRACTION
GRIGNARD REAGENTS
HYDROCARBONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LIGANDS
MAGNESIUM COMPOUNDS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
RARE EARTH COMPOUNDS
RESONANCE
SCATTERING 400702 > Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
SILICON COMPOUNDS
SYNTHESIS
X-RAY DIFFRACTION
YTTERBIUM COMPOUNDS
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Summary:There is much current interest in the organometallic chemistry of the f-block elements. Considerable progress has been made in developing the chemistry of the +3[sub la] and 0[sub lb] oxidation states: work on the +2 oxidation state has been mainly concerned with polyhapto ligands, especially substituted cyclopentadienyls. We report the synthesis and crystal structure of bis[l brace]tris-(trimethylsilyl)methyl[r brace] ytterbium, Yb[l brace]C(SiMe[sub 3])[sub 3][r brace][sub 2], obtained in good yield as a highly air- and moisture-sensitive orange solid from the reaction between YbI[sub 2] and K[l brace]C(SiMe[sub 3])[sub 3][r brace][sup 5] in benzene, and the determination of its crystal structure. As far as we are aware this is the first solvent-free dialkyl lanthanide to be characterized. We also describe the preparation and structure of an Yb analogue of a Grignard reagent; these have been used in synthesis but have not previously been isolated. The most interesting and surprising feature of the solid-state structure is that the C-Yb-C angle is 137[degree]. 19 refs., 2 figs.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja00105a065