Chemistry:Triphenylcarbethoxymethylenephosphorane

Triphenylcarbethoxymethylene­phosphorane

Names
Preferred IUPAC name Ethyl (triphenyl-λ5-phosphanylidene)acetate
Other names (2-Ethoxy-2-oxoethylidene)triphenylphosphorane (Carbethoxymethylene)triphenylphosphorane (Carbethoxymethylidene)triphenylphosphorane (Ethoxycarbonylmethylidene)triphenylphosphorane Ethyl (triphenylphosphoranylidene)acetate
Identifiers
CAS Number	1099-45-2
3D model (JSmol)	Interactive image
ChemSpider	63836 Y
PubChem CID	24892754
UNII	WX75SQL8ZF Y
InChI InChI=1/CH2N2O4/c4-2(5)1-3(6)7/h1H2
SMILES O=C(OCC)C=P(c1ccccc1)(c2ccccc2)c3ccccc3
Properties
Chemical formula	C22H21O2P
Molar mass	348.382 g·mol−1
Melting point	124 to 129 °C (255 to 264 °F; 397 to 402 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Triphenylcarbethoxymethylenephosphorane is an organophosphorus compound with the chemical formula 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.