960307-87-3Relevant academic research and scientific papers
Intramolecular (sp3-hybridized) C-H activation: Yttrium alkyls versus transient yttrium hydrides
Skvortsov, Grigorii G.,Fukin, Georgii K.,Trifonov, Alexander A.,Noor, Awal,Doering, Christian,Kempe, Rhett
, p. 5770 - 5773 (2007)
Intramolecular sp3-hybridized C-H activation of novel yttrium alkyl and hydrido complexes supported by bulky aminopyridinato ligands derived from deprotonated 2,6-(diisopropylphenyl)-[6-(2,6-dimethylphenyl)pyridin-2-yl] amine (Ap′-H) is reported. Reaction of YCl3 with a 2-fold molar excess of Ap′K in THF afforded complex [Ap′2YCl(thf)] (1). Alkylation of 1 with an equimolar amount of LiCH2SiMe 3 in hexane allowed isolation of the alkylyttrium derivative [Ap′2YCH2-SiMe3(thf)] (2) in 65% yield. Unexpectedly treatment of complex 2 with PhSiH3 (toluene, 20 °C) afforded the product of intramolecular sp3-hybridized C-H bond activation, Ap′(Ap′-H)Y(THF) (3). Most likely a hydrid species is formed in the course of this reaction, which undergoes rapid C-H activation since 3 is formed from 2 directly about 500 times slower than in the presence of 1 equiv of PhSiH3. Molecular structures of complexes 2 and 3 have been confirmed by X-ray crystal structure analysis.
