Reaction #1797496

Reaction equation

diphenyliodonium hexafluorophosphate

fluoroboric acid

phosphorous acid

diphenyliodonium chloride

→

diphenyliodonium fluoroborate

Solvents

water

Conditions

Workup

1. 1
   Otheris prepared by the addition at 60° C. of an aqueous solution
2. 2
   OtherThe silver halide that precipitates
3. 3
   Filtrationis filtered off
4. 4
   Concentrationthe filtrate concentrated

Procedure

The aromatic iodonium complex salts such as diphenyliodonium hexafluorophosphate may be prepared by metathesis of corresponding aromatic iodonium simple salts (such as, for example, diphenyliodonium bisulfate) in accordance with the teachings of Beringer et al., J. Am. Chem. Soc., 81, 342 (1959). Thus, for example, the complex salt diphenyliodonium tetrafluoroborate is prepared by the addition at 60° C. of an aqueous solution containing 29.2 grams (g) silver fluoroborate, 2 g fluoroboric acid, and 0.5 g phosphorous acid in about 30 milliliters (mL) of water to a solution of 44 g (139 millimoles) of diphenyliodonium chloride. The silver halide that precipitates is filtered off and the filtrate concentrated to yield diphenyliodonium fluoroborate which may be purified by recrystallization.

Source