click below
click below
Normal Size Small Size show me how
IR Spectroscopy
Organic Chemistry
Term | Definition |
---|---|
C-C | Alkane 1200 cm⁻¹ |
C=C C=C | Alkene 1640-1680 cm⁻¹ Aromatic 1600 & 1450-1500 cm⁻¹ |
C≡C | Alkyne 2180 cm⁻¹ |
C-H | Alkane 2850-2960 cm⁻¹ |
C-H | Alkene 300-3100 cm⁻¹ |
C-H | Aromatic 3030-3050 cm⁻¹ |
C≡N | Nitrile 2200-2250 cm⁻¹ |
N-H | Amines 3000-3500 cm⁻¹ |
C-O | Alcohol 1050-1150 cm⁻¹ |
C=O | Acids, Esters, Aldehydes 1690-1750 cm⁻¹ |
C=O | Amide 1630-1690 cm⁻¹ |
O-H | Acid 2500-3100 cm⁻¹ |
O-H | Phenol 3200 cm⁻¹ |
O-H | Alcohol 3000-3500 cm⁻¹ |
Fingerprint Region | 1300 cm⁻¹ (400 cm⁻¹ - 1500 cm⁻¹) The fingerprint region of a given compound is unique and, therefore, can be used to distinguish between compounds. |
Broad Peaks are due to... | Hydrogen Bonding (OH, NH) |
Order the below from broadest to sharpest: O-H N-H C-H | C-H (very sharp) N-H (slightly sharp) O-H (broadest) |
C=O C=C C-C C-O | Alkane, Alkene, Alkyne 2000 cm⁻¹ and below (does not involve hydrogen) |
O-H N-H C-H | 3000-3500 cm⁻¹ |
C=O C=O | Acids, Esters, Aldehydes 1690-1750 cm⁻¹ Carbonyl Group 1700-1750 cm⁻¹ |
C-H C-H C-H | Alkane 2850-2960 cm⁻¹ Alkene 300-3100 cm⁻¹ Aromatic 3030-3050 cm⁻¹ |
O-H O-H O-H | Acid 2500-3100 cm⁻¹ Phenol 3200 cm⁻¹ Alcohol 3000-3500 cm⁻¹ |