✦ LIBER ✦

Formation of Metallocene-Stabilized Planar-Tetracoordinate Carbon Compounds by a Protonation Route

✍ Scribed by Jörg Schottek; Gerhard Erker; Roland Fröhlich

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 583 KB
Volume: 1998
Category: Article
ISSN: 1434-1948
DOI: 10.1002/(sici)1099-0682(199805)1998:5<551::aid-ejic551>3.0.co;2-h

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✦ Synopsis

Bis(alkynyl)zirconocene and -hafnocene complexes 4 react with (butadiene)zirconocene or -hafnocene, respectively, to yield the binuclear σ,π-acetylide bridged complexes [(Cp 2 M) 2 (µ-CϵCϪR) 2 ] 7 (M = Zr, Hf; R = CH 3 , C 2 H 5 , or CH 2 Ph). The complexes 7 are selectively protonated upon treatment with N,N-dimethylanilinium tetraphenylborate or tetrakis(pentafluorophenyl)borate to yield the dinuclear metallocene cation complexes [(Cp 2 M 1 )(µ-RCC 1 ϪH)(µ-

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