DISTANCE EDUCATION
M.Sc. (Chemistry) DEGREE EXAMINATION,
DECEMBER 2017.
ORGANIC CHEMISTRY — II
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
All questions carry equal marks.
1. Write down the schematic analysis of total
synthesis of trans-9-methyl-1-decalone.
Write note on the following reaction
Lead tetra acetate oxidation
MPV reduction.
Discuss the mechanism of Demzonev
rearrangement.
2. Explain the role of activating group and blocking
group in organic synthesis.
Discuss elaborately about Robinson annelation
reaction with suitable example.
Discuss the optical activity exhibited by the
compounds containing one or more than one
asymmetric carbon.
Sub. Code
21
DE-2965
2
Ws 5
3. Discuss any four functional group interconversion
with suitable example.
Write a note on the following reagents
DCC
SEO2 .
Assign Z-configuration for the following
compounds

4. How would you detect the formed free radical? Give
any two methods.
Give four example of reactions in which
neighbouring group participation is involved.
Write a note on the following reactions
Pschorr reaction
Barton reaction.
5. Show that disrotatory ring closure is characterised
by plane.
Explain Norrish type II photochemical reaction with
suitable example.
Explain cyclo addition by Huckel Mobius
approach.
Discuss briefly about Jablonski diagram.
DE-2965
3
Ws 5
6. Explain the conformation and reactivity of
and 1,4-dimethyl cyclohexane.
Describe elaborately the photochemical reactions of
olefin.
Distinguish between configuration and
conformation.
7. Discuss the position of double bond in Vitamin-D2.

Elucidate the structure of oestrone.
Explain Barbier-Wieland degradation with an
example and mention its use.
Draw the structure of cholanic acid and allocholanic
acid. Explain their stereo chemical differences.
8. What is meant by retero synthetic analysis?
Explain Umpolung reactions with an example.
Discuss the biosynthetic route of cholesterol.
Give any one experimental method to identify the
intramolecular rearrangement.
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