Allyl bromide → Sodium 1-(propan-2-yl)cyclopenta-2,4-dien-1-ide

Participants

Reaction Steps

Sodium isopropylcyclopentadienide is prepared in THF as described in Preparation A. Then dimeric allyl nickel bromide is prepared by reacting 70 g of nickel carbonyl and 50 ml of allyl bromide in 200 ml of THF. The final solution is added dropwise onto the solution of sodium isopropylcyclopentadienide and allowed to stir at room temperature for two hours. The mixture becomes violet immediately and NaBr precipitates. The solution containing isopropylcyclopentadienyl nickel allyl is transferred to another flask and solvent is removed by pumping at or below room temperature. The product is removed by vacuum distillation at 10-2 torr in the range of 30°-40° C.

Provenance & Evidence