Compounds having the structure R3P=O\(\leftrightarrow\) R3P+–O− (analogously, phosphine @I02948@ and phosphine @S06102@).
See:
imides
Source: PAC, 1995, 67, 1533. (Use of immunoassays for the analysis of pesticides and some other organics in water samples (Technical Report)) on page 1537 [Terms] [Paper]