HBr reacts with CH2 = CH – OCH3 under anhydrous conditions at room temperature to give
CH3CHO and CH3Br
BrCH2CHO and CH3OH
BrCH2 – CH2 – OCH3
H3C – CHBr – OCH3
D.
H3C – CHBr – OCH3
Methyl vinyl ether is a very reactive gas. It is hydrolysed rapidly by dilute acids at room temperature to give methanol and aldehyde. However, under anhydrous conditions at room temperature, it undergoes many addition reactions at the double bond.
Electrophilic addition reaction more favourable.
Presence of a nitro group in a benzene ring -
activates the ring towards electrophilic substitution
renders the ring basic
deactivates the ring towards nucleophilic substitution
deactivates the ring towards nucleophilic substitution
Which of the following is the correct order of decreasing SN2 reactivity?
RCH2X > R3CX > R2CHX
RCH2X > R2CHX > R3CX
R3CX > R2CHX >RCH2X
R3CX > R2CHX >RCH2X
The IUPAC name of
1, 1-diethyl-2-dimethylpentane
4, 4-dimethyl-5, 5-diethylpentane
5, 5-diethyl-4, 4-dimethylpentane
5, 5-diethyl-4, 4-dimethylpentane
The IUPAC name of the compound shown below is
2-bromo-6-chlorocyclohex-1-ene
6-bromo-2-chlorocyclohexene
3-bromo-1-chlorocyclohexene
3-bromo-1-chlorocyclohexene
Phenyl magnesium bromide reacts with methanol to give
a mixture of anisole and Mg(OH)Br
a mixture of benzene and Mg(OMe)Br
a mixture of toluene and Mg(OH)Br
a mixture of toluene and Mg(OH)Br
Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces
4-phenylcyclopentene
2-phenylcyclopentene
1-phenylcyclopentene
1-phenylcyclopentene
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
1 – bromo -2 - methylbutane
2 – bromo -2 - methylbutane
2 – bromo -3 - methylbutane
2 – bromo -3 - methylbutane
Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of
insolubility
instability
inductive effect
inductive effect
