Benzimidazole reacts with acrylonitrile

) Give the products formed when
 

Chlorination of benzothiophene

Nitration of benzothiophene

) Vilsmeier-Haack reaction of benzofuran

Bredereck reaction

 Maquene synthesis

Discuss any two methods of preparation of oxetanes giving suitable examples.

 Give the oxiranes formed by the epoxidation reactions of cis- and trans-2-butenes. Also write the mechanism of this reaction.

 How many signals will appear in the ¹H-NMR of the following compounds?

) 3-Methylazacyclohexane

Pyrizino [2,3-d] pyridazine

 Carbazole

 Write the names of the following compounds

Write the products of oxidation of 2-hexyne using alkaline KMnO4

 How will you prepare 3-octyne from 1-hexyne? Write the steps involved.

Write the reactions for the hydroboration of propene followed by the oxidation by alkaline
H2O2.

State Markowinkoff’s Rule

. (ii) What is peroxide effect? Explain.

Explain retro Diels-Alder reaction giving a suitable example.

State and explain Saytzeff rule giving a suitable example.