From Tellurium Chloride Pentafluoride

Tellurium chloride pentafluoride added under illumination to cyanogen chloride or to trifluoromethyl cyanide, formed an imino tellurium pentafluorides as colorless liquids. 

Dichloromethyleneamino Tellurium Pentafluoride Equimolar quantities of tellurium chloride pentafluoride and cyanogen chloride are loaded into a 6 / Pyrex flask to give a pressure of approximately 1 atm at 20°. This mixture is irradiated for 5 h with an internal low-pressure mercury lamp. The volatile products are distilled under vacuum through a series of traps at — 70°, — 110°, and — 196°. The trap at — 70° contained the crude product. A series of photolysis reactions starting with 150.7 g of tellurium chloride pentafluoride yielded 82.3 g crude product that is distilled on a 100-cm spinning-band column at 76 torr yield 59.7 g (32%) b.p. 63-65°/76 torr. 

Chloro(trifluoromethyl)methyleneamino tellurium pentafluoride was similarly prepared from tellurium chloride pentafluoride and trifluoromethyl cyanide. The product could be purified only by preparative gas chromatography on a 15% Halocarbon K-352 column. The vapor pressure of the pure compound was 50 torr at 25°. 

---