Английская Википедия:Hafnocene dichloride
Hafnocene dichloride is the organohafnium compound with the formula Шаблон:Chem2. It is a white solid that is sparingly soluble in some organic solvents. The lighter homologues zirconacene dichloride and titanocene dichloride have received much more attention. While hafnocene is only of academic interest, some more soluble derivatives are precatalysts for olefin polymerization. Moreso than the Zr analogue, this compound is highly resistant to reduction.
It is prepared by a salt metathesis reaction from hafnium tetrachloride by salt metathesis:
Derivatives
Hydrolysis gives the trimer Шаблон:Chem2.[1]
The chloride ligands can be replaced by other halides.[2]
The bis(phosphide) Шаблон:Chem2 can be prepared by salt metathesis from hafnocene dichloride.[3]
References
Шаблон:Cyclopentadienide complexes