Yttrium‐Amidopyridinate Complexes: Synthesis and Characterization of Yttrium‐Alkyl and Yttrium‐Hydrido Derivatives
摘要:
AbstractAryl‐ or heteroaryl‐substituted aminopyridine ligands (N2HAr) react with an equimolar amount of [Y(CH2SiMe3)3(thf)2] to give yttrium(III)‐monoalkyl complexes. The process involves the deprotonation of N2HAr by a yttrium alkyl followed by a rapid and quantitative intramolecular sp2‐CH bond activation of the aryl or heteroaryl pyridine substituents. As a result, new Y complexes distinguished by rare examples of CH bond activations have been isolated and completely characterized. Selective σ‐bond metathesis reactions take place on the residual Y–alkyl bonds upon treatment with PhSiH3. Unusual binuclear metallacyclic yttrium(III)‐hydrido complexes have been obtained and characterized by NMR spectroscopy and X‐ray diffraction analysis.
Yttrium‐Amidopyridinate Complexes: Synthesis and Characterization of Yttrium‐Alkyl and Yttrium‐Hydrido Derivatives
作者:Lapo Luconi、Dmitrii M. Lyubov、Claudio Bianchini、Andrea Rossin、Cristina Faggi、Georgii K. Fukin、Anton V. Cherkasov、Andrei S. Shavyrin、Alexander A. Trifonov、Giuliano Giambastiani
DOI:10.1002/ejic.200900934
日期:2010.2
AbstractAryl‐ or heteroaryl‐substituted aminopyridine ligands (N2HAr) react with an equimolar amount of [Y(CH2SiMe3)3(thf)2] to give yttrium(III)‐monoalkyl complexes. The process involves the deprotonation of N2HAr by a yttrium alkyl followed by a rapid and quantitative intramolecular sp2‐CH bond activation of the aryl or heteroaryl pyridine substituents. As a result, new Y complexes distinguished by rare examples of CH bond activations have been isolated and completely characterized. Selective σ‐bond metathesis reactions take place on the residual Y–alkyl bonds upon treatment with PhSiH3. Unusual binuclear metallacyclic yttrium(III)‐hydrido complexes have been obtained and characterized by NMR spectroscopy and X‐ray diffraction analysis.
Selective σ-Bond Metathesis in Alkyl−Aryl and Alkyl−Benzyl Yttrium Complexes. New Aryl− and Benzyl−Hydrido Yttrium Derivatives Supported by Amidopyridinate Ligands
作者:D. M. Lyubov、G. K. Fukin、A. V. Cherkasov、Andrei S. Shavyrin、A. A. Trifonov、L. Luconi、C. Bianchini、A. Meli、G. Giambastiani
DOI:10.1021/om801044h
日期:2009.2.23
Yttrium dialkyl complexes coordinated by 6-aryl-substituted amidopyridinate ligands undergo selective intramolecular sp2 or sp3 C−H bond activation. Upon treatment with PhSiH3 of the resulting Y−C(alkyl, aryl) or Y−C(alkyl,benzyl) systems, a σ-bond metathesis reaction takes place selectively at the Y−C(alkyl) bond, generating rare dimeric aryl−hydrido or benzyl−hydrido yttriumcomplexes, respectively