| 英文名 | Paraldehyde |
|---|---|
| 英文别名 | acetaldehyde trimer, 2r,4c,6c-trimethyl-1,3,5-trioxane, all-cis |
| 类型 | 杂环化合物 |
| CAS号 | 123-63-7 |
| 物理性质 | M 132.2, m 12.5℃, b 124℃/751mm, d420 0.995, nD20 1.407. |
| 提纯方法 | Wash paraldehyde with water and fractionally distil it. Alternatively, it is purified by drying with anhydrous Na2SO4, then cooled to 5℃, and the frozen material is separated by decantation. The solid is distilled (b 121-124℃/atm), the distillate is collected, stored over anhydrous Na2SO4 for several days and re-distilled at atmospheric pressure before use [Le Fevre et al. J Chem Soc 290 1950]. The 2r,4c,6t-trimethyl-1,3,5-trioxane has m 14.5℃, b 125℃/760mm. [Beilstein 1 9 II 394, 19 III/IV 4715. 19/9 V 112.] |
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Paraldehyde提纯方法
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