Question

iv) Fluroalkane can be prepared with good yield by a) Finkelstin reaction b) Swartz reaction c) Free radical reaction d) Sandmeyers reaction​

Answer 1

Answer:

Swarts reaction : It is one of the best rxn. to produce fluoroalkane. When alkyl chloride / alkyl bromide is heated in presence of metallic fluoride ( such as AgF,Hg

2

F

2

,CoF

2

etc ), alkyl fluoride is produced

ex. CH

3

CH

2

Cl+AgF→CH

3

CH

2

F+AgCl

The Wurtz reaction, is a coupling reaction whereby two alkyl halides are reacted with sodium metal in dry ether solution to form a higher alkane

CH

3

CH

2

Cl+Na(dry ether)→CH

3

CH

2

CH

2

CH

3

+NaCl

Finkelstein reaction is the treatment of a primary alkyl halide with an alkali metal iodide (e.g. KI) that leads to replacement of the halogen via an SN2 Reaction with I

CH

3

CH

2

Cl+KI→CH

3

CH

2

I+KCl

Answer 2

Fluroalkane can be prepared with good yield by Swartz reaction. Thus the correct option is

Explanation:

• When alkyl bromides or alkyl chlorides are heated in the presence of fluorides of some heavy metals, alkyl fluorides or fluoroalkanes are formed.
• The reaction can be given as: $\[C{H_3}Br + AgF \to C{H_3}F + AgBr\]$
• Finkelstein reaction is used to produce alkyl iodides.
• Sandmeyer's reaction​ is used to produce arylhalides from aryl diazonium salts.
• Free radical reaction cannot be used to prepare fluoroalkanes.
• Thus, the fluoroalkanes can be prepared by Swartz reaction.