Ytterbium silsesquioxane

Finally, an unprecedented functionalized ytterbium silsesquioxane was obtained as outlined in Scheme 31. Trisilanol 3 was lithiated in situ using an excess of LiN(SiMe3)2, followed by treatment of the reaction mixture with anhydrous ytterbium trichloride. " The resulting colorless crystals of 95 were fully characterized by spectroscopic and analytical methods as well as an X-ray crystal structure... 

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