Diphenyl ditelluride

Diphenyl ditelluride
Names
	IUPAC name Diphenylditelluride
	Other names Phenylditelluride
Identifiers
CAS Number	32294-60-3 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	90943 ;
ECHA InfoCard	100.046.332
PubChem CID	100657;
CompTox Dashboard (EPA)	DTXSID1043916 ;
	InChI InChI=1S/C12H10Te2/c1-3-7-11(8-4-1)13-14-12-9-5-2-6-10-12/h1-10H Key: VRLFOXMNTSYGMX-UHFFFAOYSA-N ; InChI=1/C12H10Te2/c1-3-7-11(8-4-1)13-14-12-9-5-2-6-10-12/h1-10H Key: VRLFOXMNTSYGMX-UHFFFAOYAJ;
	SMILES C1([Te][Te]C2=CC=CC=C2)=CC=CC=C1; [Te]([Te]c1ccccc1)c2ccccc2;
Properties
Chemical formula	C12H10Te2
Molar mass	409.42 g/mol
Appearance	Orange powder
Density	2.23 g/cm3
Melting point	66 to 67 °C (151 to 153 °F; 339 to 340 K)
Boiling point	decomposes
Solubility in water	Insoluble
Solubility in other solvents	Dichloromethane
Structure
Coordination geometry	90° at Se; C2 symmetry
Dipole moment	0 D
Hazards
Main hazards	Toxic
R-phrases (outdated)	20/21/22-36/37/38
S-phrases (outdated)	26-36
Related compounds
Related compounds	Ph2S2,; Ph2Se2
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Diphenylditelluride is the chemical compound with the formula (C₆H₅Te)₂, abbreviated Ph₂Te₂ This orange-coloured solid is the oxidized derivative of the unstable benzenetellurol, PhTeH. Ph₂Te₂ is used as a source of the PhTe unit in organic synthesis and as a catalyst for redox reactions.[1]

Preparation

Ph₂Te₂ is prepared by the oxidation of tellurophenolate, which is generated via the Grignard reagent:[2]

PhMgBr + Te → PhTeMgBr

2PhTeMgBr + 0.5 O₂ + H₂O → Ph₂Te₂ + 2 MgBr(OH)

The molecule has C₂ symmetry.

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References

Alberto, Eduardo E.; Muller, Lisa M.; Detty, Michael R. (2014). "Rate Accelerations of Bromination Reactions with NaBr and H₂O₂ via the Addition of Catalytic Quantities of Diaryl Ditellurides". Organometallics. 33 (19): 5571–5581. doi:10.1021/om500883f.
Crich, D.; Yao, Q. "Diphenyl Ditelluride" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289X.rd416.

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[1] Alberto, Eduardo E.; Muller, Lisa M.; Detty, Michael R. (2014). "Rate Accelerations of Bromination Reactions with NaBr and H₂O₂ via the Addition of Catalytic Quantities of Diaryl Ditellurides". Organometallics. 33 (19): 5571–5581. doi:10.1021/om500883f.

[2] Crich, D.; Yao, Q. "Diphenyl Ditelluride" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289X.rd416.