Infrared
Spectroscopy
Introduction, Simple
Harmonic oscillator, Modes of vibration, force constant, Vibrational spectrum
of a diatomic molecules: Vibrational Energy expression, Allowed vibrational
energies, zero-point energy, Selection rule, Vibration- rotation Spectra: Born-Oppenheimer
approximation, Energy expression for vibrational rotor, Interpreting IR
Spectra: functional group and fingerprint region. Infra-red spectroscopy in
organic molecules, IR spectra of alkanes, alkenes and simple alcohols (inter
and intramolecular hydrogen bonding), aldehydes, ketones, carboxylic acids and
their derivatives (effect of substitution on >C=O stretching absorptions.
Numericals.
Introduction
Infrared Spectroscopy is the analysis of
infrared light interacting with a molecule. This can be analyzed in three ways
by measuring absorption, emission and reflection. The main use of this
technique is in organic and inorganic chemistry. It is used by chemists to
determine functional groups in molecules. IR Spectroscopy measures the
vibrations of atoms, and based on this it is possible to determine the
functional groups.
Infrared spectroscopy is the study of
the interaction of infrared light with matter. The fundamental measurement
obtained in infrared spectroscopy is an infrared spectrum, which is a plot of
measured infrared intensity versus wavelength (or frequency) of light.
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