M.Sc. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2017.
Third Semester
Chemistry
Paper IV ADVANCED ORGANIC SPECTROSCOPY
2 20134 A
Time 3 Hours Max. Marks 70
SECTION — A
Answer any FIVE questions. 6 30 Marks)
1. Explain Proton decoupling.
2. Explain NOE.
3. Explain DEPT.
4. What is echo experiment?
5. Explain COSY.
6. Explain principle of NMR.
7. Explain solvent effect on IR values.
8. Explain temperature effect on U.V. values.
SECTION — B
Answer ALL questions. 10 40 Marks)
9. Explain homo and hetero nuclear coupling.
Or
Explain SFORD, types of chemical shifts.
10. Explain principle and applications of INEPT, SPT methods.
Or
Explain spectral editing technique, polarization transfer and signal
enhancement.

11. Explain NOESY, long range 13C COSY.
Or
Explain TOCSY, HOMO COSY.
12. Give spectral data for cholesterol.
Or
Explain Spectral data for coumarin, papaverine.