Name Which of the following is the best leaving group? H-OH Br Which type of sub

Question

Name Which of the following is the best leaving group? H-OH Br Which type of substrate will undergo substitution and elimination by bimolecular mechanism under all reaction conditions? Methyl substrate Secondary substrate Primary substrate Tertiary substrate Carbocation rearrangements may occur for which types of mechanisms? S_N1 and S_N2 Deuterium isotope effect is high if cleavage of a C-H bond occurs in the rate determining step/rate limiting step. Which one of these mechanisms will she high deuterium isotope effect? S_N2 E2 An S_N2 reaction at a chirality center will have what stereochemical result? stereochemistry is retained stereochemistry is inverted stereochemistry is racemized stereochemistry is minimized

Explanation / Answer

1) the best leaving group here among the options is (c) Br

The stronger the acid, the weaker the conjugate base.Here HBr is strong acid .

2) Substitution and elimination by bimolecular mechanism is seen in secondary substrate

3) Carbocation rearrangement can be observed in E1 and SN2 recation .

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