Ferrocene

ferrocene

[′fer·ə‚sēn] (organic chemistry) (CH₂)₅Fe(CH₂)₅ Orange crystals that are soluble in ether, melting point 174°C; used as a combustion control additive in fuels, and for heat stabilization in greases and plastics.

Ferrocene

(also dicyclopentadienyliron), (C₅H₅)₂Fe, an orange crystalline solid having a melting point of 173°–174°C that is readily soluble in organic solvents. First synthesized in 1951, ferrocene is a member of a large class of organometallic compounds known as metallocenes. The ferrocene molecule has the sandwich structure that is characteristic of the class:

Ferrocene undergoes substitution reactions to the cyclopentadienyl rings; in this sense, the compound is similar to benzene and other aromatic compounds. For example, it is alkylated and acylated in the Friedel-Crafts reaction, and it also undergoes mercuration and sulfonation. The compound is stable at temperatures up to 400°C when heated in the air; it is also stable in the presence of acids and alkalies. Ferrocene is obtained by heating cyclopentadiene (C₅H₆) with metallic iron and by the reaction of cyclopentadienylmagnesium bromide (C₅H₅MgBr) with ferrous chloride.

单词	ferrocene
释义	ferrocene ferrocene (ˈfɛrəʊˌsiːn) n (Elements & Compounds) a reddish-orange insoluble crystalline compound. Its molecules have an iron atom sandwiched between two cyclopentadiene rings. Formula: Fe(C5H5)2[C20: from ferro- + c(yclopentadi)ene] Ferrocene ferrocene [′fer·ə‚sēn] (organic chemistry) (CH₂)₅Fe(CH₂)₅ Orange crystals that are soluble in ether, melting point 174°C; used as a combustion control additive in fuels, and for heat stabilization in greases and plastics. Ferrocene (also dicyclopentadienyliron), (C₅H₅)₂Fe, an orange crystalline solid having a melting point of 173°–174°C that is readily soluble in organic solvents. First synthesized in 1951, ferrocene is a member of a large class of organometallic compounds known as metallocenes. The ferrocene molecule has the sandwich structure that is characteristic of the class: Ferrocene undergoes substitution reactions to the cyclopentadienyl rings; in this sense, the compound is similar to benzene and other aromatic compounds. For example, it is alkylated and acylated in the Friedel-Crafts reaction, and it also undergoes mercuration and sulfonation. The compound is stable at temperatures up to 400°C when heated in the air; it is also stable in the presence of acids and alkalies. Ferrocene is obtained by heating cyclopentadiene (C₅H₆) with metallic iron and by the reaction of cyclopentadienylmagnesium bromide (C₅H₅MgBr) with ferrous chloride.
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