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Summary of IR vs Raman
Parameter, IR, Raman
9
Chemistry
Undergraduate 4
04/24/2014
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Term
Spectroscopic Phenonmenon (IR)
 Definition
Absorption of light - hvir = ΔE vibr
Term
Spectroscopic Phenonmenon (raman)
 Definition
Inelastic Scattering of Light : hvo-hvsc = ΔEvibr
Term
Allowed Transition (IR)
 Definition
ΔV = 1,2,3
Term
Allowed Transition (Raman)
 Definition
ΔV=+-1,+-2,+-3... overtones show less
Term
Excitation (IR)
 Definition
Polychromatic IR Radiation
Term
Excitation (Raman)
 Definition
Monochromatic Radiation (Vo) UV, Visible, near IR
Term
Molecular Orgin (IR)
 Definition
Dipole Moment: u=qr
Term
Molecuar Orgin (Raman)
 Definition
Induced Dipole Moment: P=ae
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