Selective σ-Bond Metathesis in Alkyl−Aryl and Alkyl−Benzyl Yttrium Complexes. New Aryl− and Benzyl−Hydrido Yttrium Derivatives Supported by Amidopyridinate Ligands

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 yttrium complexes, respectively.