N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Chemistry, Part-II
PAPER-XIV
(Photochemistry and Pericyclic Reaction)
Annual Examination, 2017
Time 3 Hours. Full Marks 80
Answer any FIVE Questions.
All questions carry equal marks.
1. What do you mean by pericyclic reaction What are the types of pericyclic reaction Write
them with suitable examples.
2. Explain and discuss the photo chemistry of intermolecular demerisation of alkene by
Cyclo addition.
3. Write notes on the following
Frank Condon principle.
Quenching.
Singlet and triplet state.
4. What do you understand by Frontier molecular orbital symmetry.
5. What is the endo-rule as applied to Diel-Alder reaction
6. Write down the explanatory notes on Cope-Rearrangement and Aza-Cope Rearrangement.
Write down the selection rules for signatropic rearrangement.
7. Give molecular diagram of
Pentadiene
5 hatatriene
8. Explain photolysis of nitrates having primary -Carbon, Secondary -Carbon and no hydrogen at -Carbon.
9. Give mechanism of Norrish type I process. How many types of Carbonyl Compounds gives this reaction
10. Write notes on the following
Photochemistry of Aromatic Compounds.
Aza Cope Rearrangement.