Difference between revisions of "Chem341:NMR workshop/Exercise 4"
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You should answer each question correctly before moving onto the next. | You should answer each question correctly before moving onto the next. | ||
<quiz> | <quiz> | ||
| + | {Question | ||
| + | |type="()"} | ||
{For the left hand CH<sub>3</sub>, how many hydrogens are on the neighboring carbon?|type="()"} | {For the left hand CH<sub>3</sub>, how many hydrogens are on the neighboring carbon?|type="()"} | ||
+ 0 | + 0 | ||
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Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | ||
<quiz> | <quiz> | ||
| + | {Question | ||
| + | |type="()"} | ||
{For the left hand CH<sub>3</sub>, what is the multiplicity?|type="()"} | {For the left hand CH<sub>3</sub>, what is the multiplicity?|type="()"} | ||
+ 0 | + 0 | ||
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Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | ||
<quiz> | <quiz> | ||
| + | {Question | ||
| + | |type="()"} | ||
{For the CH<sub>2</sub>, what is the multiplicity?|type="()"} | {For the CH<sub>2</sub>, what is the multiplicity?|type="()"} | ||
+ 0 | + 0 | ||
| Line 117: | Line 123: | ||
Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. | ||
<quiz> | <quiz> | ||
| + | {Question | ||
| + | |type="()"} | ||
{For the right hand CH<sub>3</sub>, what is the multiplicity?|type="()"} | {For the right hand CH<sub>3</sub>, what is the multiplicity?|type="()"} | ||
+ 0 | + 0 | ||
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|| Wrong! Look again... | || Wrong! Look again... | ||
- triplet | - triplet | ||
| − | || Correct! | + | || Correct! You successfully analyzed the first structure. |
- quartet | - quartet | ||
|| Wrong! Look again... | || Wrong! Look again... | ||
Revision as of 23:50, 25 October 2009
This page is to help you to answer Exercise 4 in the Chem 341 NMR Workshop. The guided help is (for the first structure only) below the images.
Structures
Error: Image is invalid or non-existent.
First structure
You should answer each question correctly before moving onto the next. <quiz> {Question |type="()"} {For the left hand CH3, how many hydrogens are on the neighboring carbon?|type="()"} + 0 || Correct! Now go on to the next question. - 1 || Wrong! Look again... - 2 || Wrong! Look again... - 3 || Wrong! Look again... - 4 || Wrong! Look again... </quiz> Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. <quiz> {Question |type="()"} {For the left hand CH3, what is the multiplicity?|type="()"} + 0 || Wrong! Remember it's n+1 - 1 || Correct! Now go on to the next question. - 2 || Wrong! Remember it's n+1 - 3 || Wrong! Remember it's n+1 - 4 || Wrong! Remember it's n+1
{What do you call a peak with that multiplicity?|type="()"} + singlet || Correct! Now go on to the next question. - doublet || Wrong! Look again... - triplet || Wrong! Look again... - quartet || Wrong! Look again... - multiplet || Wrong! Look again...
{For the CH2, how many hydrogens are on the neighboring carbon?|type="()"} + 0 || Wrong! Look again... - 1 || Wrong! Look again... - 2 || Wrong! Look again... - 3 || Correct! Now go on to the next question. - 4 || Wrong! Look again... </quiz> Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. <quiz> {Question |type="()"} {For the CH2, what is the multiplicity?|type="()"} + 0 || Wrong! Remember it's n+1 - 1 || Wrong! Remember it's n+1 - 2 || Wrong! Remember it's n+1 - 3 || Wrong! Remember it's n+1 - 4 || Correct! Now go on to the next question.
{What do you call a peak with that multiplicity?|type="()"} + singlet || Wrong! Look again... - doublet || Wrong! Look again... - triplet || Wrong! Look again... - quartet || Correct! Now go on to the next question. - multiplet || Wrong! Look again...
{For the right hand CH3, how many hydrogens are on the neighboring carbon?|type="()"} + 0 || Wrong! Look again... - 1 || Wrong! Look again... - 2 || Correct! Now go on to the next question. - 3 || Wrong! Look again... - 4 || Wrong! Look again... </quiz> Now apply the n+1 rule from above to calculate the multiplicity, where n = the no. of Hs on neighboring carbons. <quiz> {Question |type="()"} {For the right hand CH3, what is the multiplicity?|type="()"} + 0 || Wrong! Remember it's n+1 - 1 || Wrong! Remember it's n+1 - 2 || Wrong! Remember it's n+1 - 3 || Correct! Now go on to the next question. - 4 || Wrong! Remember it's n+1
{What do you call a peak with that multiplicity?|type="()"} + singlet || Wrong! Look again... - doublet || Wrong! Look again... - triplet || Correct! You successfully analyzed the first structure. - quartet || Wrong! Look again... - multiplet || Wrong! Look again...
</quiz>
