Characteristic

Tellurium tetrachloride is the inorganic compound with the empirical formula TeCl₄. The compound is volatile, subliming at 200 °C at 0.1 mmHg.

Chemical formula：[TeCl₄]₄

Molar mass：1077.64 g/mol

Appearance：hygroscopic pale yellow solid   (if fused, maroon liquid)

Density：3.26 g/cm³, solid

Melting point：224 °C (435 °F; 497 K)

Boiling point：380 °C (716 °F; 653 K)

Crystal structure：Monoclinic, mS80

Application

TeCl₄ is of occasional interest in organic synthesis. It adds to alkenes to give Cl-C-C-TeCl₃ derivatives, wherein the Te can be subsequently removed with sodium sulfide. Electron-rich arenes react to give aryl Te compounds. Thus, anisole gives TeCl₂(C₆H₄OMe)₂, which can be reduced to the diaryl telluride.