Triphenylphosphine phenylimide

Triphenylphosphine phenylimide

Names
Other names tetraphenylhosphine imide, N-(triphenylphosphoranylidene)benzenamine, (phenylimino)triphenylphosphorane, N-(triphenylphosphoranylidene)aniline, N-phenylimino(triphenyl)phosphorane
Identifiers
CAS Number	2325-27-1
3D model (JSmol)	Interactive image
ChemSpider	67888
EC Number	219-039-1
PubChem CID	75352
InChI InChI=1S/C24H20NP/c1-5-13-21(14-6-1)25-26(22-15-7-2-8-16-22,23-17-9-3-10-18-23)24-19-11-4-12-20-24/h1-20H Key: PTLOPIHJOPWUNN-UHFFFAOYSA-N
SMILES c1ccc(cc1)N=P(c2ccccc2)(c3ccccc3)c4ccccc4
Properties
Chemical formula	C24H20NP
Molar mass	353.40 g·mol−1
Appearance	white solid
Density	1,239 g/cm3
Melting point	131–132 °C (268–270 °F; 404–405 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Triphenylphosphine phenylimide is the organophosphorus compound with the formula Ph₃P=NPh (Ph = C₆H₅). It is a white solid that is soluble in organic solvents. The compound is a prototype of a large class of Staudinger reagents, resulting from the Staudinger reaction.

The phosphine imides were first prepared in the laboratory of Nobelist Hermann Staudinger. The synthesis involves the reaction of triphenylphosphine with phenylazide.^[1]

Ph₃P + N₃Ph → Ph₃P=NPh + N₂

X-ray crystallography establishes that the P-N-C angle is bent (130.4°) and the P-N distance is 160 pm.^[2]

References

1. ↑ "Über neue organische Phosphorverbindungen III. Phosphinmethylenderivate und Phosphinimine (New organic compounds of phosphorus. III. Phosphinemethylene derivatives and phosphinimines)" Staudinger, H.; Meyer, J. Helvetica Chimica Acta 1919, volume 2, 635-46. doi:10.1002/hlca.19190020164
2. ↑ Eberhard Böhm; Kurt Dehnicke; Johannes Beck; Wolfgang Hiller; Joachim Strähle; Andreas Maurer; Dieter Fenske. "Die Kristallstrukturen von Ph₃PNPh, [Ph₃PN(H)Ph][AuI₂], und von 2,3-Bis(triphenylphosphoranimino)maleinsäure-N-methylimid (The Crystal Structures of Ph₃PNPh, [Ph₃PN(H)Ph][AuI₂] and of 2,3-Bis(triphenylphosphoranimino)maleic Acid-N-methylimide)". Zeitschrift für Naturforschung B. 43: 138–148. doi:10.1515/znb-1988-0202.