Spectra
Chemistry / spectra.yaml 16 records
2 sections
ir_frequencies 5 nmr_shifts 11
ir frequencies
| Group | Bond | Mode | Min Cm | Max Cm | Intensity |
|---|---|---|---|---|---|
| Alcohol O-H | O-H | Stretching | 3,200 | 3,600 | Strong, Broad |
| Amine N-H | N-H | Stretching | 3,300 | 3,500 | Medium |
| Carbonyl C=O | C=O | Stretching | 1,650 | 1,800 | Strong |
| Alkene C=C | C=C | Stretching | 1,620 | 1,680 | Variable |
| Alkyne C#C | C#C | Stretching | 2,100 | 2,260 | Variable |
nmr shifts
| Nucleus | Group | Min Ppm | Max Ppm | Description |
|---|---|---|---|---|
| 1H | Methyl (R-CH3) | 0.7 | 1.3 | Saturated primary carbon |
| 1H | Methylene (R-CH2-R) | 1.2 | 1.4 | Saturated secondary carbon |
| 1H | Methine (R3-CH) | 1.4 | 1.7 | Saturated tertiary carbon |
| 1H | Allylic (C=C-CH3) | 1.6 | 2.2 | Next to double bond |
| 1H | Acetyl methyl (O=C-CH3) | 2.1 | 2.6 | Next to carbonyl |
| 1H | Aromatic (Ar-H) | 6.5 | 8.5 | Attached to benzene ring |
| 1H | Aldehyde (R-CHO) | 9 | 10 | Aldehyde proton |
| 1H | Carboxylic Acid (R-COOH) | 10 | 12 | Acidic proton |
| 13C | Alkane (C-C) | 0 | 50 | sp3 carbons |
| 13C | Alkene/Aromatic (C=C) | 100 | 160 | sp2 carbons |
| 13C | Carbonyl (C=O) | 160 | 220 | Aldehyde, Ketone, Acid, Ester |