Facile Insertion of N2O into Metal−Carbon Bonds of Metallocene Allyl Complexes to Form (RN2O)− Ligands

Attempts to generate a scandium metallocene oxide using N 2 O have revealed that N 2 O undergoes facile insertion into metal−carbon bonds of allyl metallocene complexes to form (RN 2 O) − ligands where R = C 3 H 5 . This has been demonstrated in reactions with the tetramethylcyclopentadienyl allyl complexes (C 5 Me 4 H) 2 M(η 3 -C 3 H 5 ) (M = Sc, Y) and the pentamethylcyclopentadienyl allyl compounds (C 5 Me 5 ) 2 M(η 3 -C 3 H 5 ) (M = Y, Sm, La), which generate the insertion products [(C 5 Me 4 H) 2 M(μ-η 1:η 2 -ON═NC 3 H 5 )] 2 (M = Sc, 1; Y, 2 ) and [(C 5 Me 5 ) 2 M(μ-η 1:η 2 -ON═NC 3 H 5 )] 2 (M = Y, 3; Sm, 4; La, 5 ), respectively.