Infrared Spectroscopy, Nuclear Magnetic Resonance, Spectrophotometry, Molecular Structure, Functional Groups, IR Spectrum, NMR Signals, Beer Lambert Law
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Abstract
This document provides an analysis of various spectroscopy techniques, including IR and NMR, to identify molecular structures and determine the presence of specific functional groups.
Contents
Exercise 1 - Identification of a Food Colouring
Exercise 2 - Determination of the NMR Spectrum of an Organic Compound
Exercise 3 - Determination of the Structure of an Organic Compound
Exercise 4 - Monitoring of a Substitution Reaction
Exercise 1 - Identification of a Food Colouring
Exercise 2 - Determination of the NMR Spectrum of an Organic Compound
Exercise 3 - Determination of the Structure of an Organic Compound
Exercise 4 - Monitoring of a Substitution Reaction
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[...] the limiting reagent). For 2-methylpropan-2-ol, we have two sets of equivalent hydrogen nuclei that are those of the [...]
[...] Then, the device is closed to prevent external light from entering. Once this is done, a known beam of light is passed through the solution and the transmitted beam is recovered. Thanks to the transmitted light intensity and the Beer Lambert law, we can then associate with each of the radiation (wavelength) of the visible spectrum an absorbance and thus plot an absorbance spectrum. On see that the solution of absorbs to the maximum for radiation . These wavelengths correspond to orange to red colors (from the smallest to the largest). [...]
[...] We find 4 peaks so we expect to find 4 groups of equivalent nuclei. We then have: One can see in the annex table that for the proton type [...]
