By Leonard, John; Lygo, B.; Procter, Garry
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Extra info for Advanced practical organic chemistry
Decoupling experiments and two-dimensional NMR experiments will often be required to do this. 1H NMR data is often the most complex to report and so it is important that you record it in an appropriate format as soon as you have analyzed the spectrum. A high-field 1H NMR spectrum can be used to provide evidence of purity and isomeric homogeneity, and most journals now require a copy of the spectrum as supplementary material to a publication. A typical reporting format is as follows: The nucleus should be specified as a subscript to the δ symbol, and the instrument frequency, solvent, and chemical shift standard should be given, for example, δH (300 MHz, CDCl3).
This will have the capability of downloading or calculating properties of substrates and reagents, such as molecular weights, densities, molarities, and names. Once the amount of the limiting reagent and the required equivalents of other reagents are added, the quantities of reactants, including volumes of liquids, are calculated automatically. The yield of the reaction is also calculated once the product quantity is recorded. 2. Another feature of an ELN that removes a lot of tedium from writing up experiments is “cloning,” where a completed experiment is used as the basis for a similar follow-up experiment.
The DSC experiment detects the melting range for the solid and also quantifies the heat required. Exothermic processes, such as conversion to a more stable polymorph or decomposition, are also detected and quantified, making DSC a useful safety measurement. An exothermic decomposition at low temperature is indicative of explosive behavior and indicates that caution is required when handling the compound. 2. Boiling points of liquids For liquids that have been distilled, the boiling range and pressure should be specified.
Advanced practical organic chemistry by Leonard, John; Lygo, B.; Procter, Garry