Triphenylcarbethoxymethylenephosphorane is an organophosphorus compound with the

chemical formula A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as pare ...

Ph₃PCHCO₂Et (Ph = phenyl, Et = ethyl). It is a white solid that is soluble in organic solvents. The compound is a Wittig reagent. It is used to replace oxygen centres in ketones and aldehydes with CHCO₂Et.

References

{{reflist Organophosphorus compounds Ethyl esters