Model Answer for M.Sc. (Chemistry) Second Semester ... Answer_MSc II Semester_Organic... · Model Answer for M.Sc. (Chemistry) Second Semester Examination, 2013 Organic Chemistry

Model Answer for M.Sc. (Chemistry) Second Semester Examination, 2013

Organic Chemistry – II (CMT – 203)

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Model Answer

For

M. Sc. (Chemistry) (Second Semester) Examination, 2013

CHEMISTRY

(ORGANIC CHEMISTRY – II)

AR-7129



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Section – A

(Short Answer Type Questions)

1. (i) Prove that the C-C single bond can participate in NGP.



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1. (ii) 4-Chloro-1-butanol reacts with PhSH 5700 times faster than 3-chloro-1-butanol;

Explain with mechanism.

1. (iv) Complete the reactions:



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1. (iii) Presence of –OMe group activate benzene rings towards electrophilic substitution reaction but

deactivate benzene reaction for nucleophiles. On the other hand, -NO2 acts in opposite direction. –

Explain.



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1. (v)



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1. (vii)

1. (ix) Give probable mechanism for the following photochemical reaction



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1. (x) Suggest mechanism for the following photo reaction

1. (vii) General mechanism and Energy profile diagram of Friedel-Craft reaction.



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Section – A

(Short Answer Type Questions)

2. (a) Write the general mechanism, evidences and effect of substituent’s on SNAr2

reaction.



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2. (b) Discuss the NGP by sigma and Pi-bond

Discuss details with suitable examples.



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3 (a) Friedel-Craft reaction:



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3 (b) von-Ritcher Reaction



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Q. 4 (a)



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5. (i)

5. (ii)



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5 (iii)

6 (a)



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7 (a)



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8. (a)

8. (b)



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Model Answer for M.Sc. (Chemistry) Second Semester ... Answer_MSc II Semester_Organic... · Model Answer for M.Sc. (Chemistry) Second Semester Examination, 2013 Organic Chemistry