A reaction of mono-and trichloro acetic acid with ammonium salts of alkylene (dialkyl) dithiophosphate;[S2NH4; G=─ CH2CH2CHMe─,─ C (Me) 2C (Me) 2─,─ CH2C (Me) 2CH2─, and─ C (Me) 2CH2CHMe─;(RO) 2PS2-NH4; and R= C2H5, C3H7, i-C3H7;] in a 1: 1 molor ratio in refluxing benzene solution yields low melting solids and light-yellow oily liquids of the type [(RO) 2PS2R'and S2R′, where R′= CH2COOH and Cl2CCOOH], ...