The Protonation Site in Aminophosphonates

摘要

The protonation equilibria in aminophosphonates: protonation on nitrogen vs phosphoryl oxygen has been calculated.The calculated energy differences explain satisfactory experimentally observed tendency toward nonstability of aminophoshonates in acidic media.Some time ago it was found that N-phenyl derivatives of 9-aminofluorenephos-phonic acids and 2-fluorenyl aminomethanephosphonic acid are decomposed to amine,phosphorus acid and fluorenone-9 or 2 fluorenecarboxaldehyde,correspondingly,during acidic hydrolysis.