4. (a) Determine the number of signals you would expect to...

Name: 4. (a) Determine the number of signals you would expect to see in the ^1H NMR of each compound below, (b) Predict the ratio of the areas of the signals in each spectrum, and (c) Show how you would distinguish between the compounds in each pair based on chemical shift.
Uploaded: 2022-05-16T17:50:18-08:00
Duration: 3 min 44 s
Channel: Nicole Krahulik
Description: 4. (a) Determine the number of signals you would expect to see in the ^1H NMR of each compound below, (b) Predict the ratio of the areas of the signals in each spectrum, and (c) Show how you would distinguish between the compounds in each pair based on chemical shift.

4. (a) Determine the number of signals you would expect to see in the ^1H NMR of each compound below, (b) Predict the ratio of the areas of the signals in each spectrum, and (c) Show how you would distinguish between the compounds in each pair based on chemical shift.

Transcript

00:01 In this problem, you were first asked about the number of signals we'd see, full of protein in a mar for each of these.

00:08 So if we start over here, we have two hydrogens here that will get their own signal, because they're the only ones attached to the carbon attached to the oxygen.

00:23 This carbon here is going to have its own peak as well.

00:30 This carbon has one hydrogen.

00:32 It'll show up on its own.

00:34 These two methyl groups, though, are identical.

00:37 So those will show up as just one peak that integrates to sex, and this hydrogen will get its own peak.

00:43 So here we should expect five peaks.

00:46 Here, we're going to have a hydrogen here that gets its own peak.

00:51 This hydrogen gets its own peak.

00:54 But from there, we have this symmetry.

00:56 So these two hydrogens get the same peak.

00:59 These two hydrogens get the same peak.

01:02 And this hydrogen gets its own peak.

01:04 So here we also have five peak.

01:07 And if we look down here this hydrogens the ch3 will get its own peak this will as well and then we just have this metal group here that we'll get its own peak so we expect three and down here again we're going to have three different groups then we're asked to predict the ratios of the signals so here we're going to have one hydrogen here we expect two here we're we expect two.

01:52 Here we expect one, and between these two we expect six...

Question

4. (a) Determine the number of signals you would expect to see in the ^1H NMR of each compound below, (b) Predict the ratio of the areas of the signals in each spectrum, and (c) Show how you would distinguish between the compounds in each pair based on chemical shift.

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