In the preparation of alkanes by the reduction of alkyl halides, we observe the following reaction:

R-X + 2H --------> R-H + X2

X=Halogen, R=Alkyl group

Can you explain the mechanism of this reaction?

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane