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Methylthioirontricarbonyl dimer
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Methylthioirontricarbonyl dimer : ウィキペディア英語版
Methylthioirontricarbonyl dimer

Methylthioirontricarbonyl dimer, also known as methanethiolatoirontricarbonyl dimer, is an organometallic compound with the formula Fe2(SCH3)2(CO)6. It is a red volatile solid that is classified as a transition metal thiolate complex. It exists as air-stable red crystals with two isomers, where the methyl groups are either ''anti'' (isomer A) or ''syn'' (isomer B) with respect to each other.〔King, R. B. "Organometallic Synthesis, Volume 1: Transition-metal compounds" (1965) Academic Press. ISBN 0124080502〕
==Synthesis==
It was first synthesized 1940〔Hieber, W., Scharfenberg, C. "Einwirkung organischer Schwefelverbindungn auf die Carbonyle des Eisens" ''Chem. Ber.'' 1949, vol. 73, 1012. 〕 with the discovery of isomers in 1962.〔King, R. B. "Organosulfur Derivatives of Metal Carbonyls. I. The Isolation of Two Isomeric Products in the Reaction of Triiron Dodecacarbonyl with Dimethyl Disulfide" ''J. Am. Chem. Soc.'' 1962, vol. 84, 2460. 〕 Synthesis involves treating triiron dodecacarbonyl with dimethyl disulfide:
:2 Fe3(CO)12 + 3 (CH3)2S2 → 3 ()2 + 6 CO
It can be purified by recrystallization or by sublimation. The isomers can be separated by chromatography using pentane in an alumina column.

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