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|Section2= |Section3= |Section4= |Section5= |Section6= }} Dimethylformamide is an organic compound with the formula (CH3)2NC(O)H. Commonly abbreviated as DMF (although this acronym is sometimes used for dimethylfuran), this colourless liquid is miscible with water and the majority of organic liquids. DMF is a common solvent for chemical reactions. Dimethylformamide is odorless whereas technical grade or degraded samples often have a fishy smell due to impurity of dimethylamine. As its name indicates, it is a derivative of formamide, the amide of formic acid. DMF is a polar (hydrophilic) aprotic solvent with a high boiling point. It facilitates reactions that follow polar mechanisms, such as SN2 reactions. ==Structure and properties== As for most amides, the spectroscopic evidence indicates partial double bond character for the C-N and C-O bonds. Thus, the infrared spectrum shows a C=O stretching frequency at only 1675 cm−1, whereas a ketone would absorb near 1700 cm-1. The methyl groups are inequivalent on the NMR time scale, giving rise to two singlets of 3 protons each at δ 2.97 and 2.88 in the proton NMR spectrum.〔 DMF is miscible with water. The vapour pressure at 20 °C is 3.5hPa.〔IPCS (International Programme on Chemical Safety) (1991). Environmental Health Criteria 114 “Dimethylformamide” United Nations Environment Programme, International Labour Organisation, World Health Organization; 1–124.〕 A Henry's law constant of 7.47×10−5 hPa·m3/mol can be deduced from an experimentally determined equilibrium constant at 25 °C. The partition coefficient logPOW is measured to −0.85.〔(BASF AG, department of analytical, unpublished data, J-No. 124659/08, 27.11.1987)〕 Since the density of DMF (0.95 g/cm3 at 20 °C〔) is very similar to that of water, significant flotation or stratification in surface waters in case of accidental losses is not expected. DMF is hydrolyzed by strong acids and bases, especially at elevated temperatures. With sodium hydroxide, DMF converts to formate and dimethylamine. 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「Dimethylformamide」の詳細全文を読む スポンサード リンク
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