Explain the mechanism of [4+2] cycloaddition reaction.
See Answer →Write detail mechanism for the following rearrangements:
i) Wagner-Meerwein rearrangement
ii) Beckmann rearrangement
See Answer →Among alkyl halides, order of reactivity of SN2 reaction is
CH3X > p-RX > Sec-RX > tert-RX
Discuss the factors which are mainly responsible for this order.
See Answer →Explain, why the reaction of m-bromoanisole with sodamide gives only one product. b) Describe the bromination reactions at allylic and benzylic positions by N-bromosuccinimide.
See Answer →Write the chemical reaction for the following reactions along with their detail description:
a) Reimer-Tiemann reaction
b) Carbylamine reaction
c) Witting reaction
d) Wolff rearrangement
e) Hofmann rearrangement
See Answer →Pyrrole is more basic than pyridine.
See Answer →2-Position in furan is more reactive than the 3-position towards electrophilic substitution
See Answer →Write the structure of 3-methyl-1,3-thiozol.
See Answer →Michael addition
See Answer →Aldol condensation
See Answer →
Predict the major and minor products of the following reactions:
(i) Friedel-Crafts acylation of pyrrole
(ii) Friedel-Crafts alkylation of pyridine
See Answer →What is Huckel’s rule? Which of the following compound(s) is aromatic? Justify your answer.
(i) Cycloctatatraene
(ii) Nitrobenzene
See Answer →What do you understand by para-directing activators, para-directing deactivators and meta-directing deactivators?
See Answer →Differentiate Saytzeff and Hofmann rules giving suitable examples
See Answer →Rate of reaction of acetaldehyde with aniline increases with the increase in acidity but beyond certain limit it decreases with further increase of acidity.
See Answer →Electron withdrawing substituents at the carbonyl carbon increase the reactivity towards nucleophilic addition reactions.
See Answer →
Answer the questions given for the following reaction:
i) Write the electrophile participating in this reaction.
ii) Write the reagents used for the reaction.
iii) Name the reaction.
iv) Write the complete mechanism of the reaction.
See Answer →Why is a substitution reaction proceeding by SN2 mechanism referred sometimes as direct displacement process? Arrange the following aliphatic bromides in the increasing order of reactivity by SN2 mechanism:
