Diazomethane Insertion into Lanthanide− and Yttrium−C(allyl) Bonds To Form the η2-Hydrazonato Complexes (C5Me5)2Ln[η2(N,N′)-RNN═CHSiMe3] (R = C3H5)
摘要:
(Trimethylsilyl)diazomethane, Me(3)SiCHN(2), is not metalated by the metallocene allyl complexes (C(5)Me(5))(2)Ln(C(3)H(5)) but instead inserts to form the lanthanide hydrazonato complexes (C(5)Me(5))(2)Ln)[eta(2)(N,N')- RNN=CHSiMe(3)] (R = CH(2)=CHCH(2); Ln = Sm, La, Y). Although the La, Y, and Sm complexes are isomorphous, the double bond in the allyl substituent is oriented toward La and away from Y and Sm.