Organic Lab Reactions 74

Organic Lab Reactions 74 - DIRECT FLUORINATION AND ADDITION...

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

View Full Document Right Arrow Icon
DIRECT FLUORINATION AND ADDITION OF FLUORINE 69 is continued for another hour; then the mass is cooled with solid carbon dioxide and allowed to distil through water. The crude ethyl fluoride,' obtained in 81% yield, is passed through a soda-lime tube, then recti- fied, b.p. --37.7°. Isopropyl Fluoride. 46 The procedure is the same as for ethyl fluoride except that the temperature is kept at 0°, and the ratio of hydrogen fluoride to propylene is held to 1.08. The yield is 61%; isopropyl fluoride boils at -10.1°. Cyclohexyl Fluoride. 46 In a copper container fitted with inlet, outlet; and stirrer is placed 200 g. of anhydrous hydrogen fluoride. After cool- ing to —35°, 400 g. of precooled cyclohexene is added dropwise over a period of seventy-five minutes. The reaction mixture is poured into a copper beaker filled with cracked ice, stirred, decanted, dried, and dis- tilled under 300 mm. pressure (b.p. 71-71.4°). The yield is 60%; at 10° it is only 54%. 2,2-Difluoropropane
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