Thermal transformations of αH 6 P 2 Mo 18 O 62 •nH 2 O heteropolyacid

) of both heteropolyanionsparticipate in the exchange with a solution and therefore are the most labile fragments. Protonation of theМ—О—М bridges between the triplets and the anionframework weakens additionally their bonds favoring rotation of the triplets, which was found during the thermaldehydration of both P