Using FMO method explain why [1,3] sigmatropic rearrangement of protons in
alkenyl chain does not occur.
In the analysis using FMO method:
The C-H bond that is migrating is assumed to be homolytically split.
The resulting carbon free radical and the orbital of the hydrogen atom are involved in the reaction.
The HOMO of
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Taking suitable examples explain 1,3-dipolar cyclo-addition reactions.
Write the mechanism of following rearrangement reactions
i) Wagner-Meerwein rearrangement
ii) Curtius rearrangement
Classify organic dyes according to their chemical composition.
Taking suitable examples, discuss the migrating aptitude of the migrating group in
Pinacol-pinacolone rearrangement reactions.
Write the mechanism of Paterno-Buechi reaction.
Write the full reaction and mark the nucleophile and electrophile in each case.
i) Reaction between potassium cyanide and 1-chloropropane
ii) Reaction between hydrogen bromide and cis 2-butene
iii) Reaction between sodium methoxide and benzyl bromide
iv) Acid catalysed reaction of water with cyclopentene
v) Reaction between ethanal and hydrogen cyanide
Arrange the following in the increasing order of electrophilic substitution. Justify your answer.
