Hydrolysis mechanism of esters that contain poalk and PSAlk groups

For the mixed esters of tetracoordinated phosphorus acids, that contain POAlk and PSAlk groups, a cleavage of the ester and thioester bonds at a commensurate rate is observed in the reaction with water and during acid hydrolysis, in contrast to alkaline hydrolysis, which leads to a preferential cleavage of the P-S bond.