Complete the reaction H₃C-Br + ________ for the follwing:-

1. Hg₂F₂

2.CoF₂

3.SbF₃

On reaction of CH3Br with Hg₂F₂, CoF₂, SbF₃ and AgF gives fluoromethyl. The reactions are known as Swarts reaction.

2CH₃Br + Hg₂F₂  $\to$ 2CH₃F + Hg₂Br₂

2CH₃Br + CoF₂ $\to$ 2CH₃F + CoBr₂

3CH₃Br + SbF₃ $\to$ 3CH₃F +  SbBr₃