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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.

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प्रश्न

Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.

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उत्तर

It acts as a stronger nucleophile from the carbon end because it will lead to the formation of C – C bond which is more stable (bond between two similar atoms) than C – N bond.

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अध्याय 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १४५]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 10 Haloalkanes and Haloarenes
Exercises | Q III. 78. | पृष्ठ १४५

संबंधित प्रश्न

Write the major products(s) in the following:


Which would undergo SN1 reaction faster in the following pair and why?


Which would undergo SN2 reaction faster in the following pair and why ?


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Write the isomers of the compound having the formula C4H9Br.


Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2Br + KCN ->[aq{.} ethanol]}\]


Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2CH2OH + SOCl2 ->}\]


In the reaction, \[\ce{R - X + NaOR' -> ROR’ + X}\] ( – ve ion). The main product formed is:


Most reactive halide towards SN1 reaction is ____________.


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The order of reactivities of the following alkyl halides for an SN2 reaction is:


SN1 reaction of alkyl halides lead to ___________.


Which of the following statements are correct about this reaction?

(i) The given reaction follows SN2 mechanism.

(ii) (b) and (d) have opposite configuration.

(iii) (b) and (d) have same configuration.

(iv) The given reaction follows SN1 mechanism.


Which of the compounds will react faster in SN1 reaction with the OH ion?

\[\ce{CH3-CH2-Cl}\] or \[\ce{C6H5-CH2-Cl}\]


The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is ______.






Discuss SN2 mechanism of methyl bromide using aqueous KOH.


Discuss the mechanism of alkaline hydrolysis of methyl bromide.


Explain why Grignard reagents should be prepared under anhydrous conditions.


Which alkyl halide from the following pair would you expect to react more rapidly by an SN2 mechanism? Explain your answer.

\[\begin{array}{cc}
\ce{CH3CHCH2CH2Br}\\
|\phantom{.............}\\
\ce{CH3}\phantom{..........}\\
\end{array}\] or \[\begin{array}{cc}
\ce{CH3CH2CHCH2Br}\\
|\\
\phantom{...}\ce{CH3}\\
\end{array}\]


Which of the following is halogen exchange reaction?


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