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Infrared spectroscopy
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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 covering Edexcel A Level Chemistry Infrared spectroscopy for A Level Chemistry. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. 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.