Formation of a bifunctional zirconocene complex that favours intramolecular -B(C6F5)2 addition to a Cp ring over sigma-ligand abstraction.
The diphenyl-ansa-zirconocene complex 2 adds HB(C6F5)2 at the C=C double bond of its pendent Cp-allyl functional group to yield 3. During 3 days at room temperature the -B(C6F5)2 group takes part in an electrophilic substitution reaction at the adjacent Cp-ring to form 5 with formation of one equivalent of benzene. Complex 5 was characterized by X-ray diffraction.
Hill
Michael
M
Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany.
Kehr
Gerald
G
Erker
Gerhard
G
Kataeva
Olga
O
Fröhlich
Roland
R