Introduction to Nucleophilic Substitution Reaction
Consider the ...
Question
Consider the reaction : CH3CH2CH2Br+NaCN→CH3CH2CH2CN+NaBr
This reaction will be fastest in :
A
N,N'-dimethylformamide (DMF)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Water
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
ethanol
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Methanol
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A N,N'-dimethylformamide (DMF) (Polar aprotic solvent)
CH3CH2CH2Br+NaCN→CH3CH2CH2CN+NaBrThis is a SN2 reaction frow which polar aprotic medium is suitable for faster rate of reaction.
H+ in polar protic solvent will solvate the nucleophile so that the nucleophilic attacking efficiency is lowered and reduce the rate of SN2 reaction.
Hence, option (d) is correct.