Advertisements
Advertisements
प्रश्न
SN1 reactions are accompanied by racemization in optically active alkyl halides.
Advertisements
उत्तर
In SN1 reaction, formation of carbocation as an intermediate takes place. This carbocation has sp2-hybridised and planar structure. This planar carbocation is attacked by nucleophile from both the sides equally to form d and l isomers in equal proportion. Such products are called racemic mixture. Hence, SN1 reactions are accompanied by racemisation in optically active alkyl halides.
APPEARS IN
संबंधित प्रश्न
Given reasons: 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 ?
How the following conversion can be carried out?
Ethyl chloride to propanoic acid.
In the reaction, \[\ce{R - X + NaOR' -> ROR’ + X}\] ( – ve ion). The main product formed is:
Which of the following pairs is/are correctly matched?
| Reaction | Product | |
| I | RX + AgCN | RNC |
| II | RX + KCN | RCN |
| III | RX + KNO2 | \[\begin{array}{cc} \phantom{.......}\ce{O}\\ \phantom{.....}/\\ \ce{R - N}\phantom{....}\\ \phantom{.....}\backslash\backslash\\ \phantom{.......}\ce{O} \end{array}\] |
| IV | RX + AgNO2 | \[\ce{R-O-N=O}\] |
The order of reactivities of the following alkyl halides for an SN2 reaction is:
When CH3CH2CHCl2 is treated NaNH2 product formed is:-
The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is ______.
Racemisation occurs in ______.
Inversion of configuration occurs in ______.
