click below
click below
Normal Size Small Size show me how
Orgo 2 IR Spec
Infrared Spectroscopy
| Term | Definition |
|---|---|
| C-C single bond | 1200 (Fingerprint) |
| Isolated C-C double bond | 1640-1680 |
| Terminal C-C triple bond | <2200 |
| Conjugated C-C double bond | 1640-1640 |
| Aromatic C-C double bond | ~1600 |
| Internal C-C triple bond | Peak absent |
| Alcohol O-H | 3300, broad |
| Acid O-H | 3000, broad |
| Primary Amine, -NH2 | 3300, broad, two spikes |
| Secondary Amine, -NHR | 3300, broad, one spike |
| Tertiary Amine, -NRR' | No N-H peak |
| Ketone | 1710, strong |
| Aldehyde | 1725, strong, w/ C-H peak @ 2700-2800 |
| Carboxylic Acid | 1710, strong w/ broad O-H peak @ 2500-3500 |
| Carboxylic Ester | ~1735, strong |
| Strained Ketone | >1780, strong |
| Amide | 1640-1680, strong |
| Conjugated Ketone/Aldehydes/Benzoic Acid | 1680-1690, strong |
| C-N single bond | ~1200 (Fingerprint) |
| C-N double bond | ~1660 |
| C-N triple bond | >2200 |
| Fingerprint Region | 600-1400 |