Diazomethane Insertion into Lanthanide− and Yttrium−C(allyl) Bonds To Form the η2-Hydrazonato Complexes (C5Me5)2Ln[η2(N,N′)-RNN═CHSiMe3] (R = C3H5)
2008
(Trimethylsilyl)diazomethane, Me3SiCHN2, is not metalated by the metallocene allyl complexes (C5Me5)2Ln(C3H5) but instead inserts to form the lanthanide hydrazonato complexes (C5Me5)2Ln[η2(N,N′)-RNN═CHSiMe3] (R = CH2═CHCH2; 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.
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