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MCAT-NMR-H1
| Question | Answer |
|---|---|
| RCH3 | 0.9 ppm |
| RCH2 | 1.25 ppm |
| R3CH | 1.5 ppm |
| -CH=CH | 4.6 - 6 ppm |
| -C(trip. bond)CH | 2 - 3 ppm |
| Ar-H (H on aromatic ring: popular) | 6 - 8.5 ppm |
| -CHX | 2 - 4.5 ppm |
| -CHOH/ -CHOR | 3.4 - 4 ppm |
| RCHO (aldehyde: popular) | 9 - 10 ppm |
| RCHCO- | 2 - 2.5 ppm |
| -CHCOOH/-CHCOOR | 2 - 2.6 ppm |
| -CHOH-CH2OH | 1 - 5.5 ppm |
| ArOH | 4 - 12 ppm |
| -COOH (carboxylic acid: popular) | 10.5 - 12 ppm |
| -NH2 | 1 - 5 ppm |
| TMS (tetramethylsilane) | 0.0 ppm |
| deshielding | downfield (to the left)... (higher ppm) |
| To determine # of peaks present: | n + 1 rule (n = # of protons 3 bonds away from proton of interest) |
| doublet area ratio? | 1:1 |
| triplet area ratio? | 1:2:1 |
| 4 peaks, area ratio? | 1:3:3:1 |
Created by:
ak3dave888
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