Alevel Chemistry Revision OC 22
Revision Material
Duration: 9th – 14th March
Topic 22 Analytical techniques
Analytical techniques are important tools for investigating compounds.
Learning outcomes
Candidates should be able to:
22.2 Infra-red spectroscopy (a) analyse an infra-red spectrum of a simple molecule to identify functional groups (see the Data
Booklet for the functional groups required)
, 22.2 Infra-red spectroscopy
analyse an infra-red spectrum of a simple molecule to identify functional groups (see the Data Booklet for the functional
groups required)
Data Booklet
Characteristic infra-red absorption frequencies for some selected bonds
Absorbance (%) 0
Peak frequency = 1/𝜆
peak
Infra Red Spectrum
1. Vibrations of a covalent bond absorb some particular infra red frequencies
2. Types of vibrations
Bond stretching
Vibrations of covalent bonds
Bond bending
3. Infra red spectrum
Absorbance (%) 0
Wavenumber / cm-1 (frequency)
Revision Material
Duration: 9th – 14th March
Topic 22 Analytical techniques
Analytical techniques are important tools for investigating compounds.
Learning outcomes
Candidates should be able to:
22.2 Infra-red spectroscopy (a) analyse an infra-red spectrum of a simple molecule to identify functional groups (see the Data
Booklet for the functional groups required)
, 22.2 Infra-red spectroscopy
analyse an infra-red spectrum of a simple molecule to identify functional groups (see the Data Booklet for the functional
groups required)
Data Booklet
Characteristic infra-red absorption frequencies for some selected bonds
Absorbance (%) 0
Peak frequency = 1/𝜆
peak
Infra Red Spectrum
1. Vibrations of a covalent bond absorb some particular infra red frequencies
2. Types of vibrations
Bond stretching
Vibrations of covalent bonds
Bond bending
3. Infra red spectrum
Absorbance (%) 0
Wavenumber / cm-1 (frequency)
