17.2- Infrared Spectroscopy

Question 1

Define infrared spectroscopy?

Answer 1

The analysis of infrared light interacting with a molecule

Question 2

Hour does Ir spectroscopy work?

Answer 2

• a beam of IR radiation is passed through a sample of a chemical and is absorbed by covalent bonds in the molecule ( increasing vibrational energy )
• different bonds absorb different amounts of radiation and stretch and vend accordingly

Question 3

What are the uses of Ir spectroscopy?

Answer 3

• identification of particular bonds in a molecule
• bonds determined as they have characteristic peaks in identifiable parts of the spectrum
• identification of compounds by direct comparison of specta- compare spectrum with known sample
• fingerprint region of the spectrum is unique to each compound so unknowns can be found