No abstract

Reaction between tetramethylammonium fluoride (CH 3 ) 4 NF and MoO 3 in 1:1 molar ratio in the minimum amount of dry acetonitrile gives tetramethylammonium trioxyfluoromolybdate (VI), (CH 3 ) 4 N[MoO 3 F] in very high yields. The compound has been characterized by elemental analyses and IR spectral studies. The advantages of the new method are discussed.

Orange solid tetrabutylammonium fluorochromate, (C4H9)4NCrO3F, TBAFC, is easily synthesized by the reaction of tetrabutylammonium fluoride with CrO3 in a 1:1 mole ratio. Tetrabutylammonium fluorochromate(VI) is a versatile reagent for the effective and selective oxidation of organic substrates, in particular of alcohols, under mild conditions. The facile oxidation of triphenylphosphine to triphenylphosphine oxide by TBAFC in CH3CN provides clear evidence for an oxygen-transfer reaction. .

A number of alcohols were oxidized to the corresponding carbonyl compounds in excellent yields using tetramethylammonium fluorochromate in acetic acid. The oxidant takes up two electrons, the reaction follows first-order kinetics with respect to the oxidant under pseudofirst-order conditions, and the concentration of alcohols changes according to the Michaelis3Menten dependence.