Studies on Organo-Phosphorus, -Arsenic and -Antimony Polytungstates and Polymolybdates (Ⅶ)——Preparation and Properties of p-Aminophenylarsenic Polymolybdates

In order to investigate the influence of organic groups on the types of organoarsenic polymolybdates, the reations of p-aminophenylarsonic acid with sodium molybdate were tested at pH=3-5. Six salts were prepared and characterized. (1) (CN3H8)4 (p-NH3C6H4As)2Mo6O25] · H2O, (2) (CN3H6)4 (p-, NH3C6H4As )2Mo6O25 ] · 6H20, (3) Cs4 (p-NH3C6H4As)2Mo6O25] · 4H2O, (4) C(CH3)4N]4(p-NH3C6H4As)2Mo6O25] · 5H2O, (5) (n-C4H9)4N]3Na(p-NH3C6H4As)2Mo6O25] · 2H2O, (6) Ba2 NH3C6H4As)2Mo6O25] · 10H2O. The IR, UV spectra, and electrochemical behavior are reported and discussed. They should belong to the same type as that for phenyl derivative or the nitrophenyl derivatives. But the ammo groups can accept protons, so that the anion' s charge decreases. Very similar to the tungsten congener (CN3H6)4(p-NH3C,H4As)2W6O25] · 4H2O, (RAs)2Mo6O25]4- type of complexes are formed.