Is isobutanol and 2-butanol the same?
No, isobutanol and 2-butanol are not the same compound.
Both compounds have the molecular formula C₄H₁₀O. This means they both have 4 carbon atoms, 10 hydrogen atoms, and 1 oxygen atom. However, the way these atoms are arranged is different.
2-Butanol is a secondary (2°) alcohol. Its structure is a straight (but branched) chain, and the hydroxyl (-OH) group is attached to a carbon atom that is itself attached to two other carbon atoms.
Isobutanol (or 2-methyl-1-propanol) is a primary (1°) alcohol. It has a branched chain, and the hydroxyl (-OH) group is attached to a carbon atom that is only attached to one other carbon atom.
| Property | 2-Butanol | Isobutanol |
|---|---|---|
| IUPAC Name | Butan-2-ol | 2-Methylpropan-1-ol |
| Molecular Formula | C₄H₁₀O | C₄H₁₀O |
| Type of Alcohol | Secondary (2°) | Primary (1°) |
| Structure | Straight chain, -OH on carbon #2 | Branched chain, -OH on a terminal carbon |
| Boiling Point | ~99.5 °C | ~108 °C |
| Oxidation Product | Butanone (a ketone) | Isobutanal (an aldehyde) |
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