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.

What is aromatisation of gasoline? Illustrate giving appropriate reactions.

riefly explain Kolbe’s electrolytic method for the synthesis of alkanes. 

Briefly explain the mechanism of β-eliminatio

 Differentiate between the basicity and nucleophilicity giving suitable examples

Explain the relative stability of the following carbocations:

(i) methyl carbocation

(ii) a tertiary carbocation

(iii) a primary carbocation

(iv) a secondary carbocation

Draw the energy profile for various confirmations exhibited by cyclohexane. Also explain the relative energies of various conformations.