JEE Advanced2006ChemistryHaloalkanes and HaloarenesActual
Match the following
Options
- A(A) Q, (B) P, (C) R,S, (D) Q,S
- B(A) S, (B) R, (C) R, (D) P,S
- C(A) R, (B) Q, (C) S, (D) Q,S
- D(A) Q, (B) Q, (C) R,S, (D) P,S
Correct answer
D. (A) Q, (B) Q, (C) R,S, (D) P,S
Step-by-step solution
(A) Match with (Q) The formation of CH ₂= CH - CD ₃ can be explained on the basis of the fact that C - D bond is much stronger than C - H bond. (B) match with (Q) Reactivity of PhCHBrCH ₃ is greater than Ph CHBrCD ₃ because C - D bond is more stronger than C - H bond. (C) match with (R) and (S) In the step (II), a slow unimolecular elimination occurs in the conjugate base of the reactant and hence this mechanism is called E₁ C B or carbanion mechanism. Since step (I) must be reversible, if ethanol containing C ₂ H