Organic Lab Reactions 71

Organic Lab Reactions 71 - 66 ALIPHATIC FLUORINE COMPOUNDS...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
66 ALIPHATIC FLUORINE COMPOUNDS completely and facilitates filtration. The aqueous layer is separated as completely as practicable, and the remainder is filtered with suction and air-dried on the filter. The filtrate separates into a layer of acetylene tetrabromide and a layer of water. The solid material is removed from the filter, placed in a bottle, covered with chloroform, vigorously shaken for twenty minutes, and then filtered by suction. Pure mercuric bromide is left on the filter. The filtrate is a chloroform solution containing from 75 to 100 cc. of acetylene tetrabromide. By distillation of the chloro- form it is possible to recover the acetylene tetrabromide. 1,2-Dibromofiuoroethane and l-Bromo-2,2-difluoroethane. By a procedure analogous to that just described, 1,2,2-tribromoethane was converted to the mono- and di-fluoro derivatives. The reaction temper- ature had to be lower for good results. At 0°, the yield of mixed products was 50%; at —20°, 60-65%. At higher temperatures the yield was only
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online