 | |
| Names | |
|---|---|
| IUPAC name Technetium(IV) chloride | |
| Other names Technetium tetrachloride, Technetium chloride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
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| |
| Properties | |
| TcCl4 | |
| Molar mass | 239.718 g/mol |
| Appearance | Red solid |
| Boiling point | 300 °C (572 °F; 573 K)[1] |
| Structure | |
| Orthorhombic,oP40 | |
| Pbca, No. 61 | |
a = 0.603 nm,b = 1.165 nm,c = 1.406 nm α = 90°, β = 90°, γ = 90° | |
| Related compounds | |
Otheranions | Technetium(VI) fluoride |
Othercations | Manganese(II) chloride Rhenium(V) chloride Ruthenium(III) chloride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Technetium(IV) chloride is theinorganic compound with theformula TcCl4. It was discovered in 1957 as the first binary halide of technetium. It is the highest oxidation binary chloride of technetium that has been isolated as a solid. It is volatile at elevated temperatures and its volatility has been used for separating technetium from other metal chlorides.[2]Colloidal solutions of technetium(IV) chloride areoxidized to form Tc(VII) ions when exposed togamma rays.[3]
Technetium tetrachloride can be synthesized from the reaction of Cl2 with technetium metal at elevated temperatures between 300 and 500 °C:[4]
Technetium tetrachloride has also been prepared from the reaction oftechnetium(VII) oxide withcarbon tetrachloride in a sealed vessel at elevated temperature:[5]
At 450 °C under vacuum, TcCl4 decomposes toTcCl3 and TcCl2.[6]
As verified byX-ray crystallography, the compound is an inorganic polymer consisting of interconnected TcCl6 octahedra.
