Chlorine
- Chlorine
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En chimie organique un chlorine est un grand anneau aromatique hétérocyclique consistant, au noyau, de 3 pyrroles et d'un pyrrole réduit couplé à travers 4 liens méthine. À l'inverse d'un porphyrine, un chlorine est donc largement aromatique mais l'entière circonférence de l'anneau n'est pas aromatique.
Les chlorines contenant du magnésium sont appelés chlorophylles, et sont le pigment central photosensible dans les chloroplastes. Un composé apparenté, avec 2 pyrroles réduits, est appelé un bactériochlorine.
Structure chimique d'
une chlorine
À cause de leur photosensibilité, les chlorines sont utilisés dans les agents photosensibilisants dans les thérapies relativement expérimentales de laser anti-cancer.
Voir aussi: Corrine
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Chlorine — Chlo rine, n. [Gr. ? pale green, greenish yellow. So named from its color. See {Yellow}.] (Chem.) One of the elementary substances, commonly isolated as a greenish yellow gas, two and one half times as heavy as air, of an intensely disagreeable… … The Collaborative International Dictionary of English
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chlorine — Symbol: Cl Atomic number: 17 Atomic weight: 35.453 Halogen element. Poisonous greenish yellow gas. Occurs widely in nature as sodium chloride in seawater. Reacts directly with many elements and compounds, strong oxidizing agent. Discovered by… … Elements of periodic system
chlorine — nonmetallic element, coined 1810 by English chemist Sir Humphry Davy (1778 1829) from Gk. khloros pale green (see CHLOE (Cf. Chloe)) + chemical suffix INE (Cf. ine) (2). Named for its color. Discovered 1774, but known at first as oxymuriatic acid … Etymology dictionary
chlorine — ► NOUN ▪ a poisonous, irritant, pale green gaseous chemical element. ORIGIN from Greek khl ros green … English terms dictionary
chlorine — [klôr′ēn΄, klôr′in] n. [< Gr chlōros, pale green (< IE * ghlō , var. of base * ghel : see YELLOW) + INE3: so named (1810) by DAVY Sir Humphry, who proved it to be an element, for its color] a greenish yellow, poisonous, gaseous chemical… … English World dictionary
Chlorine — This article is about the chemical element. For the bleach, see Sodium hypochlorite. For the upcoming film, see Chlorine (film). sulfur ← chlorine → argon F ↑ Cl ↓ Br … Wikipedia
chlorine — chlorinous, adj. /klawr een, in, klohr /, n. a halogen element, a heavy, greenish yellow, incombustible, water soluble, poisonous gas that is highly irritating to the respiratory organs, obtained chiefly by electrolysis of sodium chloride brine:… … Universalium