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Hofmanna odczynnik
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Opis
Hofmann Reagent
Other Names: Hofmann degradation reagent, Bromine in alkaline solution
Main Components: Bromine (Br₂) with sodium hydroxide (NaOH) or potassium hydroxide (KOH)
Appearance: Orange-brown solution (Br₂ in aqueous alkali)
The Hofmann reagent is a reactive solution prepared by mixing bromine with a concentrated aqueous base. It is used to perform the Hofmann rearrangement (Hofmann degradation), a classical organic reaction in which a primary amide is converted into a primary amine with one fewer carbon atom.
Chemical and Physical Properties
Reagent Type: Strong oxidizing and halogenating mixture
Stability: Reactive; must be prepared freshly for use
Solubility: Aqueous, reacts with organic compounds readily
Odor: Pungent, bromine-like
Applications
Used in the Hofmann rearrangement for conversion of amides to amines
Applied in organic synthesis for structural modification of nitrogen compounds
Educational demonstrations of classical organic reaction mechanisms
Intermediate tool for preparing shorter-chain amines in research chemistry
Handling and Storage
Prepare immediately before use; do not store for long periods
Work under a fume hood to avoid inhalation of bromine vapors
Keep away from heat, acids, and reducing agents
Dispose of according to regulations for halogenated oxidizers
