Influence of the nature of organic solvents on the extraction of N-benzoyl-N-phenylhydroxylamine and on the association with tri- n-butyl phosphate and tri- n-octylphospine oxide

Abstract

The distribution constant of N-benzoyl-N-phenylhydroxylamine (HBPHA) between aqueous perchlorate solutions of ionic strength 0·01 and various organic solvents have been determined in the absence and presence of tri- n-butyl phosphate (TBP) and tri- n-octylphosphine oxide (TOPO). The distribution constants, in the absence of TBP and TOPO, for hexane, benzene, several benzene derivatives and some alkyl chlorides can be correlated satisfactorily with theoretical calculations based on the regular solution theory. Association constants between HBPHA and TBP or TOPO have been determined by solvent extraction in most of the solvents. The association constants decrease with increasing values for the distribution constant of HBPHA.