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IR spectroscopy - Coggle Diagram
IR spectroscopy
Factor affecting vibrational frequency
Hydrogen bonding
Electronic effect
Inductive effect
Mesomeric efffect
Fermi resonance
Coupled vibration
Introduction
Deals with infra red region (12800_10cm^-1) of electromagnetic radiation
A=log 1/T
Wavelength=1/wave number in cm
Fundamental modes of vibration
Streching
Symmetric streching vibration.
Asymmetric streching vibration
Bending
In plane deformation vibration
Scissoring
Rocking
Out plane deformation vibration
Twisting
Wagging
Selection rule
Centro symmetric
Inactive
Non centro symmetric
Active.
Combination
Two vibrational frequencies in a molecule couple to give rise new vibrational frequency
Difference band
Difference between absorbance of frequency
Overtone
Overlapping of multiple frequency
Fermi resonance
Coupling of fundamental vibration and combination or over tone
Hooks law
v=1/2πc√k/mu