Diphenylditelluride
From Wikipedia, the free encyclopedia
| Diphenylditelluride | |
|---|---|
 |
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| General | |
| Systematic name | Diphenylditelluide |
| Other names | Phenylditelluride |
| Molecular formula | C12H10Te2 |
| SMILES | C1(TeTeC2=CC=CC=C2)=CC=CC=C1 |
| Molar mass | 409.42 g/mol |
| Appearance | Orange powder |
| CAS number | [32294-60-3] |
| Properties | |
| Density and phase | 2.23 g/cm3 |
| Solubility in water | Insoluble |
| Other solvents | Dichloromethane |
| Melting point | 66-67 °C |
| Boiling point | decomp. |
| Structure | |
| Coordination geometry |
90° at Se C2 symmetry |
| Dipole moment | 0 D |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | Toxic |
| NFPA 704 | |
| R/S statement | R: 20/21/22-36/37/38 S: 26-36 |
| RTECS number | |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Related compounds | Ph2S2, (Ph2Se2 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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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.
[edit] Preparation
Ph2Te2 is prepared by the oxidation of phenyltelluroate, which is generated via the Grignard reagent:[1]
- PhMgBr + Te → PhTeMgBr
- 2PhTeMgBr + 0.5 O2 + H2O → Ph2Te2 + 2 MgBr(OH)
The molecule has C2 symmetry.
[edit] Safety
Organotellurium compounds are toxic.
[edit] References
- ^ Crich, D.; Yao, Q. ”Diphenyl Ditelluride" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. DOI: 10.1002/047084289.
