Isomer Counting
As an example of isomer counting, there are nine structural isomers with molecular formula C3H6O having different bond connectivities. Seven of them are air-stable at ambient temperature, and are given in the table below. An additional two structural isomers are the enol tautomers of the carbonyl isomers, but these are not stable.
| Chemical compound | Molecular structure | Melting point (°C) | Boiling point (°C) | Comment |
|---|---|---|---|---|
| Allyl alcohol | -129 | 97 | ||
| Cyclopropanol | 101–102 | |||
| Propanal | - 81 | 48 | Tautomeric with (E)-1-propenol and (Z)-1-propenol | |
| Acetone | - 94.9 | 56.53 | Tautomeric with 2-propenol | |
| Oxetane | - 97 | 48 | ||
| Propylene oxide | - 112 | 34 | Can be resolved in two enantiomers | |
| Methyl vinyl ether | - 122 | 6 |
Read more about this topic: Structural Isomer
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