Are there alternatives to tungsten hexafluoride (CAS: 7783-82-6) in synthesis?

While tungsten hexafluoride (CAS: 7783-82-6) is a potent Lewis acid, alternatives include other fluorinated compounds like tetrafluoromethane or other tungsten compounds such as tungsten trichloride. These alternatives can be used depending on the specific chemical reactions and requirements. It is important to evaluate the reactivity and safety of these alternatives before use.