Question

The synthesis of alkyl flourides is best accomplished by

• A. Finkelstein reaction
• B. Swarts reaction
• C. Free radical fluoination
• D. Sandmeyer's reaction

Answer 1

The correct option is B Swarts reaction

Alkyl flourides are more conveniently prepared by heating suitable chloro- or bromo-alkanes with organic fluorides such as $As{F}_3,Sb{F}_3,Co{F}_3,AgF,H{g}_2{F}_2$ etc.
This reaction is called Swarts reaction.
$C{H}_{3}Br+AgF\underset{}{\overset{}{\to }}C{H}_{3}F+AgBr2C{H}_{3}C{H}_{2}Cl+H{g}_2{F}_2\underset{}{\overset{}{\to }}2C{H}_{3}C{H}_{2}F+H{g}_{2}C{l}_2$