Madurai Kamraj University (MKU) 2006 M.Sc Chemistry ", 6 - ORGANIC 2" - Question Paper

This Is for the MK DDU - "M.SC IN CHEMISTRY-MAY 2006 examination ques. Papers", and please Refer to the Attached File,

Keep Visit and post the ques. and answers you are looking for,

Happy Studying in our isc.com,Dont forget to re-visit and Post your Collection of ques.

It's For "M.SC IN IN CHEMISTRY-MAY 2006 examination ques. Papers ", It'a Course in "Madurai Kamaraj University" or %MK University% in Distance Education Mode

The paper Name Is "M.SC CHEMISTRY,PAPER six - ORGANIC CHEMISTRY2"


This ques. Paper is applicable for those who joined on or after MAY 2006 .

(6 pages)

5556/MC6    may 2006

ORGANIC CHEMISTRY II

3. (a) Name the rearrangement and predict the product giving mechanism.

(i)

Or

(b) Discuss the conformations and stability of mono and di-substituted cyclohexanes.    (10)

UNIT II

4.    (a) Distinguish between fluorescence and phosphorescence.    (2)

(b) Give one example each for a [1, 3] and [3, 3] sigmatropic rearrangement.    (2)

5.    (a) Write briefly on Paterno-Buchi reaction. (6)

Or

(b) Write a short account of Woodward-HofTmarm rules,    (6)

6.    (a) Discuss Type I and Type II photo oxidations with suitable examples.    (5 + 5)

Or

(b) Construct a correlation diagram and discuss the disrotatory and conrotatory inter conversion of cyclobutene-butadiene system.    (10)

UNIT III

7.    (a) What do you mean by synthon? Write two synthons for a carbonyl group.    (2)

(b) Illustrate 1,2-carbonyl addition with a suitable example.    (2)

8.    (a) Discuss the convergent approach to total synthesis.    (6)

Or

(b) Indicate the uses of activating and protecting groups in organic synthesis.    (6)

9.    (a) Outline a route for the total synthesis of 2,4-dime thyl-2 -hy dr oxype ntanoicacid.    (10)

Or

(b) Write short notes on :

(i) Retro synthetic analysis

(ii} Umpslung synthesis.    (5 + 5)

10.    (a) What is Jone's reagent? Give its important use. (2)

(b) Predict the product with mechanism.

-    A -    B

(2)

11.    (a) Explain why?

(i)    LDA is the best reagent for ester enolate formation than the strong base like amide ion.

(ii)    chromic acid oxidises axial alcohols more faster than equitorial alcohols in rigid ring system.

(3+3)

Or

(b) What is Wilkinson catalyst? Give its applications.    (6)

12.    (a) Write short notes on :

(i)    Crown ethers.

(ii)    Applications of peraeids.

(iii)    Prevost and Woodward hydroxylation.

(3 + 3 + 4)

Or

5556/MC6

[P.T.O.]

(b) Give the synthetic applications of the following reagents :

(i)    DMSO

(ii)    Na/Liq NHn

UNITV

13.    (a) What happens when terpenoids are subjected to thermal decomposition? Indicate the molecular formulae of sesquiterpene and diterpene,    (2)

(b) What are amino sugars? Give two examples.

(2)

14.    (a) Predict the product

(i) Lactose ^Bra/H*->A ^(CHS0* ...> b

^Hydraly3i3 > C+D    (3)

(ii) a - santonin

Zn/HgSQj j Y HiVTQ];

Or

(b) Bring out the differences between starch ana cellulose.    (8)

15. (a) Elucidate the structure of lactose.    (10)

Or

(b) Give a detailed account of Biosynthesis of terpenoids.    (10

6    5556/MC6

Attachment: madurai-kamraj-university--mku--2006-m-sc-chemistry-22069-1.pdf

Earning:   Approval pending.