Uranium oxide reaction with, phosgene

Volatile protactinium pentaehloride has been prepared in a vacuum by reaction of the oxide with phosgene at 550° C or with carbon tetrachloride at 200°C. Reduction of this at 600°C with hydrogen leads to protactinium(IV) tetrachloride, Pad. which is isostructural with uranium(IV) tetrachloride, UCI4. The pentaehloride can be converted into the bromide or iodide by heating with the corresponding hydrogen halide or alkali halide... 

ARCTON (75-46-7) Violent reaction with alkaline earth and alkali metals. Reacts violently with aluminum oxide at elevated temperatures, producing hydrogen chloride and phosgene vapors. Incompatible with beryllium, decaborane, diborane, difluoromethylene dihypofluorite, fluorine, lithium, magnesium, potassium, potassium acetylene-1,2-dioxide, potassium acetylene-1,2-dioxide, potassium sodium alloy, sodium amide, titanium, uranium hydride, zinc. Attacks aluminum, magnesium, zinc, and their alloys. 

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