Preparation
VOCl3 is synthesized by the chlorination of V2O5. The reaction proceeds at c. 600 °C:
- 3 Cl2 + V2O5 → 2 VOCl3 + 1.5 O2
When the V2O5 is used as an intimate mixture with carbon, the synthesis proceeds at 200–400 °C; in this case the carbon serves as a deoxygenation agent akin to its use in the Kroll process for the manufacturing of TiCl4 from TiO2.
Vanadium(III) oxide can also be used as a precursor:
- 3 Cl2 + V2O3 → 2 VOCl3 + 0.5 O2
A more typical laboratory synthesis involves the chlorination of V2O5 using SOCl2.
- V2O5 + 3 SOCl2 → 2 VOCl3 + 3 SO2
Read more about this topic: Vanadium Oxytrichloride
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