Tetrabutylammonium Isopolyoxometalates

By virtue of their solubility in aprotic organic solvents and their availability as pure crystalline materials, tetrabutylammonium isopolyoxometalates have found widespread application as starting materials for the synthesis of 

The synthesis of alkylammonium isopolyoxometalates was pioneered by Jahr, Fuchs, and Oberhauser who first prepared salts of [MoeOjg] , [WgOig] , and by controlled hydrolysis of molybdic and 

Yellow, crystalline [( -C4H9)4N]2[Mo60tg] appears to be indefinitely stable when stored in a desiccator. The compound has a characteristic IR 

The synthesis of alkylammonium isopolyoxometalates was pioneered by Jahr, Fuchs, and Oberhauser who flrst prepared salts of [Mo60i9], [WjO,] , and [W, 032] by controlled hydrolysis of molybdic and tungstic acid esters. More convenient preparations of these and other salts that utilize readily available starting materials were developed later. The preparations reported here are modifications of published procedures. They have been selected on the basis of convenience and ease of reproducibility. Ail of the anion structures have been determined by X-ray crystallography they are shown below for [Mo207] (a), [Mo60i9] and [W 0,9]  

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