Study of extraction of nitric acid by phospholene derivatives

1. Derivatives of 1-oxophospholene with phosphinate and tertiary phosphine oxide structures were synthesized and the effective constants of the extraction of nitric acid by these compounds were determined. 2. The extractive activity of the phospholene derivatives is determined by the ratio of the P-C and P-O bonds at the phosphoryl group, as well as by the position of the double bond in the heterocyclic ring.