Stabilization of a Planar-tetracoordinate Carbon Center in an Organometallic Complex Containing Both a Zirconocene and a Hafnocene Moiety

✍ Scribed by Röttger, Dirk ;Erker, Gerhard ;Fröhlich, Roland ;Kotila, Sirpa

• Publisher: Wiley (John Wiley & Sons)
• Year: 1996
• Tongue: English
• Weight: 340 KB
• Volume: 129
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19961290102

✦ Synopsis

Planar-tetracoordinate carbon atoms / Metallocene cations, methyl / Metallocene complexes, alkynyl group-4

The methylhafnocene cation 2a reacts with bispropynylzircobis(phenylacety1ide)hafnocene (3b) gives the pure regioisonocene to give a single regioisomeric planar-tetracoordinate mer 4 b with an opposite relative arrangement of the two carbon compound (4a) that contains the hafnium atom singroup 4 trdnsition metals (the methyl is at the planar-tetragly-bonded and the zirconium center $-coordinated to the coordinate carbon atom C2). Complex 4a was characterized bridging p-(q1-C:q2-C,C-2-butyne) ligand. However, the re-by an X-ray crystal structure analysis. action between the methylzirconocene cation 2b with