Iodobenzene

Part of speech: noun

Definitions

1. A colorless liquid chemical compound made of a benzene ring with a single iodine atom attached, used in organic synthesis
2. An aromatic organic substance in which one hydrogen atom of benzene is replaced by iodine, commonly employed as a laboratory reagent
3. A halogenated aromatic compound formed by substituting one iodine atom for a hydrogen on the benzene ring, used in chemical research

Etymology: Iodobenzene is a compound built from two parts that each have their own history. The "iodo-" element comes from "iodine", which takes its name from the Ancient Greek "ioeidēs", meaning "violet-coloured", because the vapour of the element shows a deep violet hue when heated. The Greek "ion" meant "violet" (the flower), and "-eidēs" meant "resembling" or "having the form of", tying back to "eidos", "form" or "appearance". The "benzene" part has a more roundabout route. It comes from "benzoin", a resin, which was named through Dutch and German forms of "benzoe", a Latinised version of an Arabic term for gum benzoin. Chemists later borrowed the "-ene" ending from the hydrocarbon family to label the ring compound benzene, which was isolated from coal-tar and was not connected to the resin by its chemistry, only by a shared name. Joining these pieces produces a word describing benzene in which one hydrogen atom has been replaced by iodine. Chemists formed such names systematically, so the word is a technical coinage rather than an old word that drifted in meaning.

Synonyms: phenyl iodide