explodes at 360 °C
MeEDNA is an acronym for N-methylethylenedinitramine or N-methylEDNA. It was first prepared back in 1888, but did not gain interest until World War II. This explosive seems to have good stability, resists decomposition, and does not vaporize much. MeEDNA has about 120% the explosive power of TNT.
|acetic anhydride||dropping funnel|
|ammonium hydroxide||500-mL Florence flask|
Prepare a solution of 82.4 g of 3-nitrazabutylamine in 100 mL of dry benzene in a 3-necked 500-mL Florence flask fitted with a stirrer , a dropping funnel, and a thermometer. Cool the solution in a salt-ice bath, and add 75 mL of acetic anhydride dropwise. A white solid precipitate should form and is collected and dried to give 71 g of N-acetyl-N'-methyl-N'-nitroethylenediamine, melting point 79-80 °C. 20 g of this compound is added in small portions to a mixture of 100 mL of 100% nitric acid and 100 mL of acetic anhydride cooled to -10 to -5 °C. The mixture is stirred for 45 minutes, poured onto crushed ice, the solid is filtered, washed with water, and finally dried to give a yield of 9.5 g of N-acetyl-N'-methyl-EDNA, melting point 55-56 °C. To 7.6 g of this compound, add 25 mL of 14% ammonium hydroxide, whereupon it dissolves with evolution of heat. The solution is cooled, acidified with dilute hydrochloric acid, the precipitated solid is collected on a filter, washed with water, and dried to give 5.1 g of MeEDNA which corresponds to a yield of 84.3%. The MeEDNA can be purified by recrystallizing from ethylene dichloride.
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