BRAINCAKEInfra-red Spectroscopy
Revision notes for Infra-red Spectroscopy in Edexcel Chemistry (8CH0). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Infra Red SpectroscopyWhen molecules absorb infra red radiation bonds vibrate in two ways: • stretching - bond length increases and decreases • bending - bond angle…
- Characteristic AbsorptionsInfra red spectra can be used to deduce the functional groups and hence the structure of an organic compound.
- Infra Red Spectrum - 1Infrared spectrum 1: ethanol, CH3CH2OH When reading a spectrum, start with the region above 1500 cm-1, where the absorptions identify functional…
- Infra Red Spectrum - 2Infrared spectrum 2: propanone, CH3COCH3 Propanone is a ketone.
- Infra Red Spectrum - 3Infrared spectrum 3: ethanoic acid, CH3COOH Ethanoic acid is a carboxylic acid.
- Infra Red Spectrum - 4Infrared spectrum 4: propanal, CH3CH2CHO Propanal is an aldehyde.
- Infra Red Spectrum - 5Infrared spectrum 5: following the oxidation of propan-1-ol Infrared spectroscopy can show whether an oxidation has worked, and which product has…
- Infra Red Spectrum - 6Infrared spectrum 6: cyclohexene from the dehydration of cyclohexanol Cyclohexanol, C6H11OH, can be dehydrated by heating with concentrated…
- Infra Red Spectrum - 7Infrared spectrum 7: identifying an unknown, C4H8O An unknown compound has the molecular formula C4H8O.
- Infra Red Spectrum - 8Infrared spectrum 8: combining infrared and mass spectra An unknown compound has the formula C3H8O.