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प्रश्न
What are ambident nucleophiles? Explain with an example.
What do you mean by ambident nucleophiles? Explain with an example.
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उत्तर
Ambident nucleophiles attack alkyl halides through two distinct atoms. This occurs due to the presence of two nucleophilic centres resulting from resonance structures in the ion. For example, the lone pair of electrons on N in the NO2 ion makes it nucleophilic, while oxygen’s negative charge works as a nucleophile.
Thus, NO2 can attack the O or N atoms, making it ambidentate.
\[\ce{RX + Ag - O - N = O -> \underset{Nitroalkane}{R - NO2}}\]
\[\ce{RX + KNO2 -> \underset{Alkyl nitrate}{R - O - N = O}}\]
संबंधित प्रश्न
Which would undergo SN1 reaction faster in the following pair and why?
Write the structures of A, B and C in the following:
In the following pair of halogen compounds, which compound undergoes a faster SN1 reaction?
Write the structure of the major organic product in the following reaction:
\[\ce{CH3CH2Br + KCN ->[aq{.} ethanol]}\]
Arrange the compounds of the following set in order of reactivity towards SN2 displacement:
2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane
Arrange the compounds of the following set in order of reactivity towards SN2 displacement:
1-Bromobutane, 1-Bromo-2, 2-dimethylpropane, 1-Bromo-2-methylbutane, 1-Bromo-3-methylbutane
Out of C6H5CH2Cl and C6H5CHClC6H5, which is more easily hydrolysed by aqueous KOH.
What happens when ethyl chloride is treated with aqueous KOH?
C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH3–Cl.
Which would undergo SN2 reaction faster in the following pair and why ?
CH3 – CH2 – Br and CH3 – CH2 – I
Halogenation of alkanes is ____________.
The order of reactivity of the given haloalkanes towards nucleophile is:
Most reactive halide towards SN1 reaction is ____________.
The order of reactivities of the following alkyl halides for an SN2 reaction is:
Which of the following is the correct order of decreasing SN2 reactivity?
The process of separation of a racemic modification into d and l-enantiomers is called ____________.
Which of the following is a chiral compound?
A primary alkyl halide would prefer to undergo ______.
The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is ______.
Give the mechanism of the following reaction:
\[\ce{CH3CH2OH ->[H2SO4][413 K] CH3CH2-O-CH2CH3 + H2O}\]
