Borane Insertion into Group-4 Metal-to-Carbon Bonds: The Reaction of HB(C6F5)2 with (η2-Formaldehyde)zirconocene Dimer and with (Butadiene)zirconocene
✍ Scribed by Ulrich Blaschke; Gerhard Erker; Roland Fröhlich; Oliver Meyer
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 278 KB
- Volume
- 1999
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Metallaoxirane / HBR 2 addition / (Formaldehyde)zirconocene / (Butadiene)zirconocene / Heterocycles / Boron (η 2 -Formaldehyde)zirconocene dimer (8) cleanly adds one or five different elements, namely H, B, C, O, and Zr. The bis(borane) insertion product 17 was characterized by an X-two molar equivalents of the borane HB(C 6 F 5 ) 2 by insertion of the H-[B] unit into the zirconium-carbon bond of the ray crystal structure analysis. (Butadiene)zirconocene reacts with HB(C 6 F 5 ) 2 in a similar way by insertion of the H-[B] unit metallaoxirane moieties to form the mono-and bis-insertion products 16 and 17, respectively. These systems contain five-
into the (butadiene)C4-Zr linkage to form the metallacycle 18. membered heterocyclic rings that are built up by connecting [a]