INFRARED SPECTROSCOPY Flashcards
What is infrared radiation?
The part of the electromagnetic spectrum with frequencies below that of red light.
What is stretching?
Occurs when a bond absorbs infrared radiation and uses it to alter the length of the bond.
What is bending?
Occurs when a bond absorbs infrared radiation and either increase or decreases the bond angle.
What is the transmittance value?
It represents the amount of radiation absorbed at a particular wavenumber.
The wavenumber of an infrared absorption represents…
the frequency of infrared radiation absorbed by a particular bond in a molecule.
The intensity of an infrared absorption describes…
the amount of infrared radiation absorbed.
The amount of energy absorbed by a molecule depends on?
- The length of the bond
- The strength of the bond
- The mass of each atom involved in the bond
A weak intensity refers to…
high transmittance values.
The absorption of infrared radiation is linked to changes in…
polarity, simple non-polar molecules (such as H₂ and Cl₂) do not absorb infrared radiation.
What are the x and y axis of an infrared spectrum?
x = wavenumber y = transmittance (%)
