Give the product(s) of the following reaction. Which of the following reacts the

Question

Give the product(s) of the following reaction. Which of the following reacts the slowest with sodium cyanide, NaCN? Which of the following does not correctly describe S_N 2 reactions of alkyl halides? Tertiary halides react faster than secondary halides Rate of reaction depends on the concentrations of both the alkyl halide and the nucleophile. The mechanism consists of a single step with no intermediates. The transition state species has a pentavalent carbon atom Which of the following conditions favor the S_N 1 mechanism as opposed to the S_N 2 tertiary alkyl halide primary alkyl halide polar solvent only I only II I and III II and II

Explanation / Answer

Q18 Which of the followingalkyl bromides reacts the slowest with sodium cyanide, NaCN

Answer :OPTION B

nucleophilic substitution.

Since the system includes impact between two species in the slow step  of the response, it is known as a SN2 response.

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Q19 Which of the following does not correctly describe the SN1 reaction?

Answer : OPTION A

Secondary alkyl halides react faster than tertiary alkyl halides

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Q20

Answer :OPTION c .I and III

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In the SN2 response, the huge boundary is steric obstruction. Since the SN2 continues through a rear assault, the response will just continue if the exhaust orbital is available. The more gatherings that are available around the region of the leaving bunch, the slower the response will be. That is the reason the rate of response continues from essential (speediest) > optional >> tertiary (slowest)

In the SN1 response, the enormous hindrance is carbocation soundness. Since the initial step of the SN1 response is loss of a leaving gathering to give a carbocation, the rate of the response will be relative to the strength of the carbocation. Carbocation soundness increments with expanding substitution of the carbon (tertiary > optional >> essential) and in addition with reverberation.

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