Page 108 - CatalogNEP-PS

12. Systematic Practical Chemistry for B.Sc 1st, 2ndand 3rd year by P.C Kamboj
13. Vogel‘s Quantitative Chemical Analysis, by J.Mendham.

Chem.213 Spectroscopy 3+1

LEARNING OBJECTIVES:

The Objectives of this course are as follows:
 To familiarize the student about different kinds of spectroscopic techniques.
 To provide the information about structure elucidation.

LEARNING OUTCOMES:

By the end of this course, students will be able to:
 Have an insight about the different spectroscopic techniques.
 Identify the different kinds of techniques for structure determination.

THEORY (45 Hours)

UNIT-I: (4 Hours)

Molecular Spectroscopy: Interaction of electromagnetic radiation with molecules and various
types of spectra; Born-Oppenheimer approximation.

UNIT-II: (5 Hours)
Rotation spectroscopy: Selection rules, intensities of spectral lines, determination of bond lengths
of diatomic and linear triatomic molecules, isotopic substitution.
UNIT-III: (10 Hours)

Vibrational spectroscopy: Classical equation of vibration, computation of force constant,
amplitude of diatomic molecular vibrations, anharmonicity, Morse potential, dissociation
energies, fundamental frequencies, overtones, hot bands, degrees of freedom for polyatomic
molecules, modes of vibration, concept of group frequencies. Vibration-rotation spectroscopy:
diatomic vibrating rotator, P, Q, R branches.
UNIT-IV: (4 Hours)

Raman spectroscopy: Qualitative treatment of Rotational Raman effect; Effect of nuclear spin,
Vibrational Raman spectra, Stokes and anti-Stokes lines; their intensity difference, rule of mutual
exclusion.

UNIT-V: (4 Hours)
Electronic spectroscopy: Franck-Condon principle, electronic transitions, singlet and triplet states,
fluorescence and phosphorescence, dissociation and predissociation, calculation of electronic
transitions of polyenes using free electron model.
UNIT-VI: (18 Hours)

Application of Spectroscopy to Simple Organic Molecules: Application of visible, ultraviolet and
Infra-red spectroscopy in organic molecules. Electromagnetic radiations and electronic transitions,
λ max& ε max, chromophore, auxochrome, bathochromic and hypsochromic shifts. Application of
electronic spectroscopy and Woodward rules for calculating λ max of conjugated dienes and α, β –
unsaturated compounds.
Infrared radiation and types of molecular vibrations, functional group and fingerprint region. IR
spectra of alkanes, alkenes and simple alcohols (inter and intramolecular hydrogen bonding),

93