STRUCTURE AND PROPERTIES OF PHOSPHORODIAMIDIC ACID - HPO2(NH2)2 AT ROOM-TEMPERATURE

At room temperature, phosphorodiamidic acid (HPO2(NH2)2) has a mobile hydrogen, which leads to P-NH3+ and P-O- groups in limiting form. Acco rding to the spectroscopic analysis, a limiting (zwitterion) or a medi um form (compound with mobile hydrogen) is prominent. This mobile hydr ogen leads phosphorodiamidic acid to react with itself giving P-N(H)-P bridges and ammonium. We obtained a major compound ammonium salt of d iamido 1, 2 imidodiphosphate which is present as P-31 MAS NMR, a cryst allographic nonequivalency.