A solution containing sodium hypophosphite (1 molecule), sodium molybdate (4 molecules), and hydrochloric acid (7 molecules) gives, with ammonium chloride, white needles of the salt NH4[H2P(Mo2O7)2]6H2O. The corresponding potassium and guanidinium salts have been prepared, but contained admixed trimolybdate.
The halogen compounds, MoCl5.POCl3; MoCl5.PCl5; MoCl4.PCl5 and MoCl4.2PCl5; and Mo3Br4(PO4H2)2, have been described. |