Question

Объясните, почему название этого вещества НЕ 1-метил пропанол-1, а бутанол-2? HO - CH - CH2 - CH3 ↓ СН3

Answer 1

Рисую эту же структурную формулу бутанола-2 по-другому:
CH₃-CH-CH₂-CH₃ , это одно и то же. 
        |
       OH

Answer 2

Explanation of Naming Conventions for Alcohols

The naming of alcohols follows the IUPAC nomenclature system, which is a set of rules to name organic compounds. In the case of the given chemical compound, the name is not "1-methylpropanol-1" but "butanol-2" due to the position of the hydroxyl group (OH) on the carbon chain.

1. Position of the Hydroxyl Group: - The hydroxyl group (OH) is attached to the second carbon atom in the carbon chain, which is why the compound is named "butanol-2".

2. IUPAC Nomenclature: - According to the IUPAC nomenclature system, the parent name for the given compound is "butane" because it has four carbon atoms in a continuous chain. The suffix "-ol" is added to indicate that it is an alcohol, and the position of the hydroxyl group is indicated by the number "2" to give the complete name "butanol-2".

3. Chemical Structure: - The chemical structure provided corresponds to the compound butanol-2, where the hydroxyl group is attached to the second carbon atom in the chain, as indicated by the downward arrow and the position of the OH group in the structure.

In summary, the compound is named "butanol-2" because the hydroxyl group is attached to the second carbon atom in the carbon chain, following the IUPAC nomenclature system for alcohols.

I hope this explanation helps! If you have further questions or need more information, feel free to ask.