Q. The synthesis of alkyl fluorides is best accomplished by

Solution:

Alkyl fluorides can be prepared by action of mercurous fluoride or antimony trifluorides (inorganic fluorides) on corresponding alkyl halide. This reaction is known as Swarts reaction. $CH_3 Br +AgF \rightarrow \, \, \, _{Methyl \, fluoride}^{CH_3F}+AgBr$ But, when aciton of Nal/acetone takes place on alkyl chloride of bromide alkyl iodide forms. This reaction is called -Finkelstein reaction- $C_2H_2 CI \xrightarrow[acetone]{Nat} C_2H_5I +NaCI$ Free redical fluorination is highly explosive reaction, so not preferred for the preparation of fluoride.

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