Chemistry, Third edition

20.16.A compound contains C, H and O. Can you work out

its identity from the following spectra?

398 20 · LIGHT AND SPECTROSCOPY

Extension material to support this unit is available on our website. Case Study 4 on the website contains

an article on Spectroscopy and Astronomy, covering many of the principles discussed in this unit. The

infrared spectrum of car exhaust is shown on page 415.

Mass spectrum

Infrared spectrum

TMS

(^1) H=NMR spectrum
2
4 3 2 1 0
δ
3
3
Wave number/cm–1
4000 2000 1000 600
Transmittance (%)
0 20 30 40 50 60 70 80
72
100%
m/e