Abstract
Cp*TaF4 (1) (Cp* = η5-C5Me5) reacts with lithium salts of benzamidines or 1,3-diketones to form hexa-coordinated complexes of composition Cp*TaF3[(Me3SiN)2CPh] (2), Cp*TaF3[(Me3SiN)2C(p-CF3C6H4)] (3) and Cp*TaF3(O=CPhCH=CPhO) (4). The reactions proceed under elimination of LiF. The X-ray crystal structure of Cp*TaF3(O=CPhCH=CPhO) (4) has been determined shows tantalum to have a distorted octahedral environment, if the Cp* ligand is considered to occupy one coordination site.
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