Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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Chapter 7, Problem 2Q
Interpretation Introduction
Interpretation:
Reason behind the removal of the stopper from a separatory funnel when liquid is being drained from it should be explained.
Concept introduction:
For daily laboratory liquid-liquid extraction, a separatory funnel is used. Two immiscible solvents can be readily separated by using the extraction technique.
Generally, one of the phases is organic, while the other is aqueous. The mixture of solvents that need to be extracted is poured from the top while stopcock at the bottom is still attached. Funnel is closed using a stopper,and two of the solvents are shaken together. Afterward funnel is inverted. The stopper is removed, and after the separation of layers, liquids are taken out in separate glassware.
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What spectral features allow you to differentiate the product from the starting material?
Use four separate paragraphs for each set of comparisons. You should have one paragraph each devoted to MS, HNMR, CNMR and IR.
2) For MS, the differing masses of molecular ions are a popular starting point. Including a unique fragmentation is important, too.
3) For HNMR, CNMR and IR state the peaks that are different and what makes them different (usually the presence or absence of certain groups). See if you can find two differences (in each set of IR, HNMR and CNMR spectra) due to the presence or absence of a functional group. Include peak locations. Alternatively, you can state a shift of a peak due to a change near a given functional group. Including peak locations for shifted peaks, as well as what these peaks are due to. Ideally, your focus should be on not just identifying the differences but explaining them in terms of functional group changes.
Chapter 7 Solutions
Macroscale and Microscale Organic Experiments
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