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|Title:||Crystallographic revelation of the role of AIMe3 (in MAO) in Cr [NNN] pyrazolyl catalyzed ethylene trimerization|
|Authors:||Zhang, J. |
|Citation:||Zhang, J., Li, A., Hor, T.S.A. (2009-05-25). Crystallographic revelation of the role of AIMe3 (in MAO) in Cr [NNN] pyrazolyl catalyzed ethylene trimerization. Organometallics 28 (10) : 2935-2937. ScholarBank@NUS Repository. https://doi.org/10.1021/om9002347|
|Abstract:||A series of Cr-Al intermetallic complexes, viz. [(Pź3CH) 2Cr11 2(μ-Cl)2]2 + 2[(Me2XAl)(μ-Cl)(Me2XAl)]- (X = Me/Cl), Pź3CHCr111MeCl(Ii-Cl)(AlMe2X) (X = Me/Cl), and Pź2CHCH2(μ-N)CH 2(μ-Ph)Cr111Cl(μ-Cl)AlMe2, have been isolated from the reactions of CrCl3(NNN) (NNN = tridentate pyrazolyl ligand) with neat AlMe3 or commercial MAO solutions. The products generally show high activity and selectivity in ethylene trimerization. Crystallographic analysis has provided structural evidence for Cr(III) reduction by residual AlMe3 in a mixture containing the "real" activator (MAO) as well as other transformations: viz., adduct formation, methylation, canonization, halide abstraction, N-H deprotonation, and C-H cleavage of an unactivated arene. © 2009 American Chemical Society.|
|Appears in Collections:||Staff Publications|
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