Di-n-butylbis(cyclopentadienyl)zirconium

Abstract

[80005-41-0] C18H28Zr (MW 335.64) (n-BuLi) [109-72-8] C4H9Li (MW 64.06) (n-BuMgCl) [693-04-9] C4H9ClMg (MW 116.87) (Cl2ZrCp2) [1291-32-2] C10H10Cl2Zr (MW 292.32) (a reagent generated in situ as a ZrCp2 equivalent useful for the preparation of ZrCp2 π-complexes containing alkynes,1, 2 alkenes,1, 2 dienes,5 aldehydes,14 and nitriles as well as five-membered zirconacycles and their bicyclic and polycyclic derivatives) Alternate Name: di-n-butylzirconocene. Physical Data: Cl2ZrCp2; mp 245 °C. Form Supplied in: n-BuLi: solutions in cyclohexane, hexanes and pentane. n-BuMgCl: solutions in diethyl ether and THF. Cl2ZrCp2: colorless crystals. All are commercially available. Preparative Methods: generated in situ by the addition of 2 equiv of n‐Butyllithium in hexanes or pentane, or n-BuMgCl in diethyl ether or THF, to Dichlorobis(cyclopentadienyl)zirconium dissolved in THF at −78 °C in an inert atmosphere of N2 or Ar. Handling, Storage, and Precaution: n-butyllithium and n-butylmagnesium chloride are sensitive to air, moisture, and a wide variety of heterofunctional and carbofunctional compounds. They must be used and stored under an inert atmosphere of N2 or Ar. Zirconocene dichloride may be handled in air, but it is advisable to avoid extensive exposure to air, moisture, and light. Use in a fume hood.