[7783-82-6] · F6W · Tungsten(VI) Fluoride · (MW 297.85)
Alternate Name: tungsten hexafluoride.
Physical Data: mp 2.5 °C; bp 17.1 °C.
Solubility: sol nonpolar aprotic organic solvents, basic water.
Form Supplied in: gas.
Handling, Storage, and Precautions: corrosive; moisture sensitive.
Both N,N-dimethylhydrazones and tosylhydrazones are oxidatively hydrolyzed under neutral conditions by treatment with tungsten(VI) fluoride in chloroform/water at 0 °C (eq 1).1 Hydrazones of aromatic aldehydes and of aromatic and aliphatic ketones are readily hydrolyzed under these conditions. In virtually all cases the yield is greater than 80%. Using tungsten(VI) fluoride, the hydrolysis proceeds at lower temperature than with other methods.2
James W. Herndon
University of Maryland, College Park, MD, USA