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|Section2= |Section3= |Section7= |Section8= }} Bis(benzene)chromium is the organometallic compound with the formula Cr(η6-C6H6)2. It is sometimes called dibenzenechromium. The compound played an important role in the development of sandwich compounds in organometallic chemistry and is the prototypical complex containing two arene ligands. ==Preparation== The substance is air sensitive and its synthesis requires air-free techniques. It was first prepared by Hafner and Fischer by the reaction of CrCl3, aluminium, and benzene, in the presence of AlCl3. This so-called reductive Friedel-Crafts method was pioneered by E.O. Fischer and his students.〔King, R. B. Organometallic Syntheses. Volume 1 Transition-Metal Compounds; Academic Press: New York, 1965. ISBN 0-444-42607-8〕〔Elschenbroich, C.; Salzer, A. "Organometallics : A Concise Introduction" (2nd Ed) (1992) Wiley-VCH: Weinheim. ISBN 3-527-28165-7〕 The product of the reaction was yellow ()+, which was then reduced to the neutral complex. Idealized equations for the synthesis are: : CrCl3 + 2/3 Al + AlCl3 + 2 C6H6 → ()AlCl4 + 2/3 AlCl3 : ()AlCl4 + 1/2 Na2S2O4 → () + NaAlCl4 + SO2 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bis(benzene)chromium」の詳細全文を読む スポンサード リンク
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