Polyoxo anions

Electrosteric stabilization can be also obtained from the couple ammonium (Bu4N+)/polyoxoanion (INWnNb C>62)- The significant steric repulsion of the bulky Bu4N+ countercation, when associated with the highly charged polyoxo-anion (coulombic repulsion), provides efficient electrosterical stability towards agglomeration in solution of the resultant nanocatalysts [2, 5, 6]. 

It is emphasized that the PZC theory for the prediction of the molecular structure of hydrated polyoxo anions holds true only under ambient conditions when the oxide surfaces are extensively hydrated. This condition is not satisfied when the supported metal oxide catalysts are heated... 

An interesting general reaction of polyoxo anions that has been recently explored is with RNCO and ArNCO reagents. Thus, with the [M6019]2 ions, products such as [W6Oi8NAr]2 , [Mo6Oi8(NPh)2]2 , and Mo6015(NAr)4]2 have been obtained.13 Of course this type of reaction,... 

Polyoxo anions of transition metals, 27 71 Potassium y-dccatungstosilicate(8 -), (K,[-y-SiW On]). dodecahydrate,... 

Transition metal complexes with weakly bonded anions, 26 92 Transition metal polyoxo anions, 27 71 Tributylammonium pentatungsto-bis(phenylphosphonate)(4 -), [[(C,H,),NH],[W,O,(QH,PO0 l], 27 127... 

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