Equilibrium acidity of certain phosphoryl and thiophosphoryl PH-acids in dimethyl sulfoxide

Autor: Tsvetkov, E. N., Terekhova, M. I., Petrov, É. S., Malevannaya, R. A., Mesyats, S. P., Shatenshtein, A. I., Kabachnik, M. I.
Zdroj: Russian Chemical Bulletin; September 1978, Vol. 27 Issue: 9 p1743-1746, 4p
Abstrakt: 1.The transmetallation method has been used to measure equilibrium acidities of P(O)H-and P(S)H-acids of various structures in dimethylsulfoxide solution and relative to 9-phenyl-fluorene.2.The effect of the substituent at the P atom on the pK value for the P(O)H-acid can be described by linear correlation relations in the sf and s* constants. The diarylphosphinous acids cannot be fitted into such correlations because of p,p coupling in their anions.3.The acidity of the P(S)H-acids is some nine orders higher than that of the phosphoryl analogs.
Databáze: Supplemental Index