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- W2106025659 endingPage "924" @default.
- W2106025659 startingPage "919" @default.
- W2106025659 abstract "(Butadiene)zirconocene adds to B(C6F5)3 to form the metallacyclic metallocene–boron betaine system 1, which contains a C–F → Zr interaction. Addition of tert-butylisocyanide or tert-butyl-cyanide leads to cleavage of the zirconium – fluorine linkage and formation of the adducts 4 and 7, respectively. With additional tert-butylisocyanide, 4 reacts further to yield the corresponding η2-imino-acyl betaines 5 and 6 (2 stereoisomers), whereas 7 inserts additional tert-butyl-cyanide into the Zr–C bond to give a chiral metallacyclic N-zirconaketimine complex that is probably stabilized by an internal borate → Zr interaction. Ethene and propene insertion reactions into the Zr - C bond of 1 follow a similar course: the mono-insertion products 9 and 10, respectively, generated in situ and characterized by NMR spectroscopy at – 35°C in [D8]toluene solution, are chiral and are also stabilized by internal borate → Zr coordination. Complexes 9 and 10 are likely to be intermediates in the formation of active homogeneous Ziegler polymerization catalysts." @default.
- W2106025659 created "2016-06-24" @default.
- W2106025659 creator A5012690080 @default.
- W2106025659 creator A5034807035 @default.
- W2106025659 creator A5077040273 @default.
- W2106025659 date "1996-08-01" @default.
- W2106025659 modified "2023-10-17" @default.
- W2106025659 title "Observing a Homogeneous Ziegler Catalyst Precursor at Work: Insertion Reactions into the Zirconium – Carbon Bond of the (Butadiene)ZrCp2/B(C6F5)3 Addition Product" @default.
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