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|Section2= |Section3= |Section4= |Section5= }} Tetramethylbutane, sometimes called hexamethylethane, is a hydrocarbon with formula C8H18 or (H3C-)3C-C(-CH3)3. It is the most heavily branched and most compact of the many octane isomers, the only one with a butane (C4) backbone. Because of its highly symmetrical structure, it has a very high melting point and a short liquid range. The compound can be obtained by reaction of Grignard reagent ''tert''-butylmagnesium bromide with ethyl bromide, or of ethylmagnesium bromide with ''tert''-butyl bromide in the presence of manganese(II) ions. This transformation is believed to go through the dimerization of two tert-butyl radicals, which are generated by decomposition of the organomanganese compounds generated in situ. The full IUPAC name of the compound is 2,2,3,3-tetramethylbutane, but the numbers are superfluous in this case because there is no other possible arrangement of "tetramethylbutane". ==References== 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「Tetramethylbutane」の詳細全文を読む スポンサード リンク
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