Definition: Fenole are aromatic compounds with a hydroxyl group $-OH$ directly attached to a benzene ring.

Example: The Cumene process for phenol production: Benzene + propene → cumene → phenol

Highlight: Polyphenols form a distinct class of compounds with multiple hydroxyl groups attached to aromatic rings.

Vocabulary: Aryl group $Ar-$ - derived from an aromatic ring system.

Definition: Fenol właściwości chemiczne include acidic behavior and distinctive reactions with iron(III) chloride.

Example: The nitration of phenol produces nitrophenols: C₆H₅OH + HNO₃ → C₆H₄(NO₂)OH

Highlight: The FeCl₃ test produces a characteristic violet color with phenols, serving as an identification method.

Quote: "Phenol is easily detected using FeCl₃" demonstrates the practical importance of this test in analytical chemistry.

Definition: Alkohole polihydroksylowe are compounds containing multiple hydroxyl groups $-OH$ attached to carbon atoms.

Example: The preparation of glycol through bromination of ethene: CH₂=CH₂ + Br₂ → CH₂Br-CH₂Br

Highlight: The Cu(OH)₂ test is a characteristic reaction for identifying adjacent hydroxyl groups in polyhydroxyl alcohols.

Vocabulary: Hygroscopic - property of absorbing moisture from the air, characteristic of glycerin.