phosphinic acids

https://doi.org/10.1351/goldbook.P04554
H2P(=O)OH (phosphinic acid) and its P-@H02891@ derivatives.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1357 [Terms] [Paper]