Which of the following is a mechanism for an S 2 reaction? Which of the followin

Question

Which of the following is a mechanism for an S 2 reaction? Which of the following is the rate low for the following reaction? A. Rate = k[H_2O] B. Rate = k[H_2O][1-chloro-methylcyclohexane] C. Rate = k[1-chloro-methylcyclohexane] D. Rate = k[chloride ion] Which of the following substrate sis the least reactive in an S 1 reaction. Which of the following is the product of the following reaction? Which of the following alkyl halides would likely undergo rearrangement during an S_ 1 reaction? For the following reaction, which of the following is the product? For the following reactions, which of the following is the product? What reaction mechanism is most likely for substitution on the following compound? A. S_N1 B. S_N2 C. Either D. Neither Which of the following compounds will react most rapidly with HCl? A) 5-methyl-1-hexene B) 4-methyl-1-hexene C) (E) -5-methyl-2-hexene D) (E) -2-methyl-3-hexene E) 2-methyl-2-hexene Which of the following alkenes yield(s) 3-bromo-3-methylpentane as the major product upon addition of HBr? A) I and II only B) III only C) I, II and III D) all of them E) none of them

Explanation / Answer

45) option C is correct

Explanation: Sn2 reaction involves a back side attack of nucleophile on carbon atom bearing halide ion.

46) option C is correct

Explanation: Reaction of tertiary alkyl halide with weak nucleophile invovles SN1 mechanism. The rate of SN1 mechanism invovles onyl the ocncentration of alkyl halide.

47) option D is correct

Explanation: -F is the weak leaving group.

48) option D is correct

Explanation: reaction of tertiary alkyl halide with nculeophile gives SN1 substitution reaction and produces substituted product.

49) option B is correct

Explanation: 1,2-hydride shift produces a tertiary carbocation as an intermediate.

50) Option D is correct

Explanation: Reaction of alcohol with HBr produces alkyl halide as product.

51) option B is correct

Explanation: reaction of alcohol with alkyl halide produces ether as product.

52) option A is correct

Explanation: Tertiary alkyl halides mostly undergoes SN1 mechanism due to the formation of more stable carbocation.

53) option E is correct

Reaction of alkene with HCl produces a carbocation as an intermediate. As the stability of carbocation increases, the rate of reaction increases.

54) option D is correct

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