Skip to content

Course home

x
Sign up
x

Why molecules absorb infrared radiation

Why molecules absorb infrared radiation

Molecular vibrations showing stretching and bending, plus IR-active HCl stretching and IR-inactive O_2 stretching

Covalent bonds are not fixed rods. They vibrate by stretching and bending, and infrared spectroscopy measures which of these vibrations absorb infrared radiation.

Infrared spectroscopy Lesson

  1. A Level
  2. /Chemistry
  3. /Infrared spectroscopy

Step-by-step lessons on Edexcel A Level Chemistry Infrared spectroscopy. Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.

Lessons