Triphenylphosphine selenide

Triphenylphosphine selenide is an organophosphorus compound with the formula (C₆H₅)₃PSe. It is a white solid which is soluble in most organic solvents. The compound is used in the preparation of other selenium compounds and is itself prepared by the reaction of triphenylphosphine with potassium selenocyanate.^[2] Single crystals have been isolated with both monoclinic^[3] and triclinic^[4] structures (space groups: P2₁/c and P1 respectively); in both cases the geometry at phosphorus is tetrahedral.

Triphenylphosphine selenide

Names
Preferred IUPAC name Triphenyl-λ5-phosphaneselone
Other names triphenylphosphane selenide
Identifiers
CAS Number	3878-44-2 Y
3D model (JSmol)	Interactive image
ChemSpider	263833
ECHA InfoCard	100.021.279
EC Number	223-406-1
PubChem CID	298720
UNII	T9S5RC2HL6 Y
CompTox Dashboard (EPA)	DTXSID00959584
InChI InChI=1S/C18H15PSe/c20-19(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18/h1-15H Key: ZFVJLNKVUKIPPI-UHFFFAOYSA-N
SMILES c1ccc(cc1)P(=[Se])(c2ccccc2)c3ccccc3
Properties
Chemical formula	C18H15PSe
Molar mass	341.25
Appearance	white solid
Melting point	186.5 to 187.5
Solubility in water	insoluble
Solubility	very soluble in dichloromethane, pyridine, and THF; moderately soluble on heating in acetonitrile, ethanol, and methanol; insoluble in ether[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

See also

• Triphenylphosphine oxide
• Triphenylphosphine sulfide
• Trioctylphosphine selenide