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IGNOU BCHCT-133 (January 2025 – December 2025) Assignment Questions
PART B: FUNCTIONAL GROUP ORGANIC CHEMISTRY-I
6. (a) Both 1, 3, 5-cycloheptatrienyl cation and 1,3,5-cycloheptatriene have 6 π elections , comments on the aromaticity of these compounds.
(b) Discuss the role of Lewis acids in halogenations and alkylation reactions of benzene. Write the limitations of Freidel Crafts alkylation reaction.
7. (a) Nitro group is meta directing, explain.
(b) What would be the final products of the reaction of HI with diethyl ether and anisol? Write the mechanism of both the reactions.
8. (a) What is aldol condensation? Write its mechanism.
(b) Arrange the following in order of their increasing reactivity towards SN2 substitution reactions: bromomethane, 1-bromo-propane, 2-bromopropane, 2-bormo-2-methyl propane. Justify your answer.
9. Write their representative reaction for the following reactions.
(a) Sandmeyer reaction
(b) Reimer-Tiemann reaction
(c) Mannich reaction
(d) Willgerodt reaction
(e) Knoevenagel reaction
10 (a) Write the mechanism of Pinacol-pinacolone reaction.
(b) How you will introduce a formyl group into phenol ring.
IGNOU BCHCT-133 (January 2024 – December 2024) Assignment Questions
