What reagents and conditions are used for the Simmons-Smith reaction?
A) CH₃I + Mg in ether
B) CH₂I₂ + Zn (Cu) in ether
C) BrCH₂CH₂Br + Zn in ether
D) CBr₄ + Zn (Cu) in ether

'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