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Common integrations
and fragments
This general list is best to use after eliminating functional groups
found in the NMR and IR (for example, alcohols, acids, aldehydes,
benzene rings can
easily be detected in both the NMR and IR). After eliminating those
functional groups, this list can help determine what other fragments
may be left).
| Integration |
Fragment
it represents |
Number
of equivalent fragments |
Comments |
| 1H |
 |
1 |
Make
sure from IR (if applicable) or from delta values from the NMR
that this is not an alcohol proton or an acid proton |
| 2H |
 |
1 |
Sometimes
2 equivalent CH fragments |
| 3H |
 |
1 |
|
| 4H |
|
2 |
Sometimes
2 equivalent CH2 fragments |
| 6H |
|
2 |
Often
indicative of an isopropyl group. Very rarely it is three equivalent
CH2 groups. |
| 9H |
|
3 |
Often
indicative of a t-butyl group. |
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