Abstract This is a description of some phosphinic acid hydrazides of the structure RR′ P (O) NHNH 2, RR′ P (O) NHNHP (O) RR′, RR′ P (O) NHNHP (S) RR′, RR′ P (O) NHNHC (O) C 6 H 5 and RR′ P (S) NHNHC (O) C 6 H 5. Indicated are the characteristic differences in the methods of preparation and properties of the hydrazides.
