MAY 1967 REACTION OF RHODIUM TRICHLORIDE WITH DIENES 1297 ... Kodak Co.) was distilled under 20-mm pressure, bp 60-62". Potassium hydroxide pellets (198 g of 8570) (3.0 moles) were heated to 100-120", and trans-1,4-dichloro-2-butene (125 g, 1.00 mole) was added slowly with stirring to the molten po- tassium hydroxide. cis-l-Chloro-1,3-butadiene was distilled, collected, and dried over calcium chloride. Distillation gave 47.1 g (537,) of ...