C−H and Si−N Bond Oxygenations of a Divalent Ytterbium Amide of the Pyrrolyl-Cyclopentadienyl Ligand

Reaction of Me4C5H-SiMe2-NC4H4 with Yb[N(SiMe3)2]2(THF)2 yielded a new type of ansa-sandwich divalent lanthanide amide (Me4C5-SiMe2-NC4H4)YbN(SiMe3)2 (2), in which the Yb atom is η5-coordinated to both the C5 and C4N rings. 2 rapidly reacted with dioxygen to give a dinuclear trivalent ytterbium species via intramolecular C−H and Si−N bond oxygenation reactions.