Which configuration will be adopted by X and Y respectively?
a) R, R
b) R, S
c) S, S
d) S, R

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Solution

Answer: b
Explanation: When ether reacts with the reactant nucleophilic substitution conjugate base reaction (i.e. $S N C B$ ) will take place and there will be retention of configuration and it will be R product. When $C_{5} H_{5} N H$ reacts with reactant $S N_{2}$ reaction will take place and configuration inversion will take place and it will be S product.

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Which configuration will be adopted by X and Y respectively?a) R, Rb) R, Sc) S, Sd) S, R

Which configuration will be adopted by X and Y respectively?
a) R, R
b) R, S
c) S, S
d) S, R