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Solution


Q.

The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ______. (Consider the structural isomers only)       [2025]
1 4  
2 1  
3 3  
4 5  

Ans.

(1)

RBr→Mg+EtherR-Mg-Br→ H2ORH+Mg(OH)Br

Possible structural isomers of R–Br for RH = 2-methylbutane are obtained by placing Br at any one of the following four places: