Tungsten → Tungsten Bis-triflimide

Participants

Reaction Conditions

Reaction Steps

Tungsten metal (1.0 g, 99% purity) filings were suspended in water (20 mL) and hydrogen bis-triflimide (HNTf2) (5 g) was added. This mixture was heated under reflux for 144 hours. The resultant slurry was cooled, filtered and concentrated on a rotary evaporator to give a colourless solution that crystalised on standing. The crystals were heated at 150° C. at 1 mmHg to remove the residual water and hydrogen bis-triflimide. The precise structure of the catalyst is not known, but it was found to be the best of all isolated metal bis-triflimide catalysts tested in the reaction of benzoyl chloride with toluene.

Provenance & Evidence