Investigation of the reactivity of arylamines, organo-hydrazines and tolylisocyanate towards [PW12-xMxO40]n- Keggin anions

Reaction of K7A,alpha-PW9Mo2O39] with Na2MoO4.2H2O in a mixture of water/dioxane/hydrochloric acid and further precipitation with (Bu4N)Br provided (Bu4N)3A,alpha-PW9Mo3O40](3). Analogous reaction with K7-xNaxalpha-PW11O39] is an alternative to the synthesis of (Bu4N)3alpha-PW11O39{MoVIO}]2. Multinuclear NMR and ESI mass spectrometry have been used to interpret the reaction of (Bu4N)xalpha-PW11O39{ReO}](x=3 1; x=4 1I), (Bu4N)xalpha-PW11O39{MoO}](x=3 2; x=4 2I) and (Bu4N)3A,alpha-PW9Mo3O40]3 by organohydrazines, arylamines, tolylisocyanate and tetraphenylphosphine imide.