A commercial preparation was purified by removing peroxides and dried over anhydrous sodium sulfate, followed by distillation. The main distillate was dried again with the same drying agent. 4. Chloroform A commercial preparation was washed with concentrated H2SO4, and then with water and KOH solution. After washing again with water, it was distilled. The main distillate was dried over potassium carbonate overnight. 215 216 HIGASHI, YAMAKAWA, KINUMAKI, SUGII AND IWASAKI 1961 5. Antimony Trichloride An extra pure grade preparation of Yotsuhata Kagaku Co. was recrystal lized from the purified CHCl3.6. Acetyl Chloride An extra pure grade preparation of Kanto Kagaku Co. was used. FIG. 1 Instruments Used for Chromato graphy 7. SbCl3-Acetyl Chloride Reagent
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