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| Roll No. | Total No. of Pages : 02 |
| Total No. of Questions : 19 |
M.Sc.(Chemistry) (Campus) (2015 to 2017) (Sem.-2)
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REACTIVE INTERMEDIATES-II
Subject Code : CHL-412 M.Code : 51149
Time : 3 Hrs. Max. Marks : 70
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains SIX questions carrying FIVE marks each and students have to attempt ALL questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Write chemical equation for Steven rearrangement.
- What do you mean by ‘Michael addition'?
- Write the structure and application of 9-BBN
- What is hydrogenolysis?
- What is Cope elimination?
- What is Stobbe reaction?
- Write mechanism of ElcB.
- Write chemical equation for Mannich reaction.
- How DMSO in combination with DCC can be used for oxidation reaction?
- Discuss reduction reaction of ester and nitrile.
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SECTION-B
- Write a brief note on Wagner-Meerwein and Demjanov rearrangement.
- Discuss oxidation reaction of methylene and aryl methenes by citing suitable examples.
- Discuss stereo chemical aspect as observed in Horner-Wittig reaction by taking suitable example.
- Explain mechanism of ozonolysis by taking suitable examples.
- Write a short note on :
- Clemensen Reduction
- Wolf-Kishner reduction
- Describe mechanism of addition of organozinc and organolithium reagents to carbonyl compounds with suitable examples.
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SECTION-C
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- Write a short note on following with special emphasis on stereo chemical aspect wherever applicable :
- Sharpless asymmetric epoxidation
- Hydroboration
- Explain the differences between El and E2 mechanism by taking suitable examples. How we can predict whether substitution or elimination will be the principal reaction observed with a particular combination of reactants?
- Write mechanism of following rearrangements :
- Von-Richter rearrangement
- Arndt-Eistert synthesis
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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