Master of Science I (Chemistry)Examination: Oct Nov 2016
Semester I (Old CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD
164
Friday
18/11/2016
10.30 AM
to
01.00 PM
Organic Chemistry I
C
II
Instructions: Answer any five questions.
All questions carry equal marks.
(Section-I) Q.1 is compulsory.
Attempt any two questions from Section II
Attempt any two questions from Section III
Draw neat and labeled diagrams wherever necessary.
Use of log table and calculators in allowed.
Total Marks:70
SECTION I
Q.1 Define the terms of following:
Carbocation
ylides
Acids and bases by Arrhenius theory
Stereo selective and stereo specific reactions
Geometrical isomerism
Resolution
Pyrolytic elimination
14
Page 1 of 2
SECTION II
Q.2 What are Carbanions? Discuss their generation, structure, stability and
reactivity.
07
Explain the SN2 reaction with their stereochemistry and effect of solvent,
nucleophile, leaving group on rate of this reaction.
07
Q.3 Explain the Aromatic nucleophilic substitution reactions with suitable
examples.
07
What are sharpless asymmetric epoxidation reactions? Explain their reaction
and stereochemistry.
07
Q.4 Explain E2 reaction with stereochemistry. 07
What is Chirality? Explain the molecule is chiral or achiral by using different
elements of symmetry.
07
SECTION III
Q.5 What is prochirality? Explain the prochirality by using different suitable
examples.
05
Draw the conformation of 3-dimethyl cyclohexane. Discuss their stability. 05
Assign R and S nomenclature to the following organic compounds.
3-phenyl-2-butanene
ii) 2-Iodo octane
04
Q.6 What is Hofmann and Saytzeff rule? Explain the orientation of elimination
reaction by using this rule.
05
Explain the orientation and reactivity of addition reaction of HX to the
alkenes by using Markovnikovs rule.
05
Discuss the free radical addition reaction and their stereochemistry. 04
Q.7 Write a note on any three of the following: 14
E and Z nomenclature
Michael reaction
IPSO attack
SNi reaction