Synthesis and Hydrolysis of Phosphoric Diamide without Seeking C-N-P Protonation by Acid

Phosphoric bis-(o-Methoxyphenyl amide) chloride, a C-N-P containing ester, on kinetic examination exhibited a rate maximum (via the Neutral form only) at 4.0 M-HCl and gave second-order kinetic rate coefficients during hydrolysis in the acid range, 0.01-7.0M HCl at 40(± 0.5)°C. In the low acid range Zwitterionic species while in the higher acid range the undissociated form have been assessed as the major contributory reactive forms, undergoing bimolecular (Arrhenius Parameters) hydrolysis with P-N bond fission, The synthesis of the bis-amide was possible by the phosphorylation procedure and identification of the product was achieved by elemental analysis, and ³¹P NMR study in particular.