酢酸マンガン(III)二水和物

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P304+P340：吸入した場合：空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P405：施錠して保管すること。

酢酸マンガン(III)二水和物 価格

酢酸マンガン(III)二水和物 化学特性,用途語,生産方法

• 説明

  Manganese (III) acetate is an inorganic compound that is used as an oxidizing agent in organic synthesis and materials science. Like the analogous acetates of iron and chromium, it is an oxygen-centered coordination complex containing three manganese atoms bridged by acetate units. The anhydrous form of this compound crystallizes as a linear coordination polymer, with an additional acetic acid molecule bridging between manganese atoms on consecutive three-manganese clusters.The chemical is therefore not a simple metal acetate ionic compound nor does the actual structure of it reflect the simple "Mn(OAc)₃" chemical formula that is commonly given. It is usually used as the dihydrate, though the anhydrous form is also used in some situations. The dihydrate is prepared by reacting potassium permanganate and manganese (II) acetate in acetic acid; addition of acetic anhydride to the reaction produces the anhydrous form.
  Mangese triacetate has been used as a single electron oxidant. It can oxidize alkenes via addition of acetic acid to form lactones.

• 化学的特性

  The cinnamon-brown crystals of a silky luster are immediately decomposed by cold water (hydration).

• 使用

  Triacetoxymanganese Dihydrate functions as a catalyst for direct acetylation of alcohols with acetic acid.

• 合成

  In the method of Christensen, the salt is obtained in the following manner: 19.6 g. (80 mmoles) of Mn(CH3COO)3 -2H3O powder is added to 200 ml. of glacial acetic acid at the boiling temperature of the latter, and is stirred until completely dissolved. Then, KMnO4 powder (3.1 g. = 20 mmoles) is gradually added and the mixture heated for a short time with constant agitation. After cooling, 3 ml. of water is added to the darkbrown solution; the mixture is allowed to stand overnight. If the quantity of precipitate is too small, another 3 ml. of water is added and the solution stirred. The formation of crystallization nuclei is promoted by frequent rubbing of the container walls with a glass rod. As a rule, copious crystallization occurs within about one hour. If necessary, the solution is allowed to stand for a few more days (frequent agitation) until the mother liquor is almost colorless. The salt is then filtered off with suction, washed with some glacial acetic acid and recrystallized. The last procedure consists in dissolving 30 g. of salt in 200 ml. of glacial acetic acid (heating), filtering off and working up further in the manner described above. Finally, the salt is dried over CaO.
  4 Mn(CH3COO)2 ? 4 H2O + KMnO4 + 8 CH3COOH = 5 Mn(CH3COO)3 ? 2 H2O + CH3COOK + 10 H2O
  

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19513-05-4, 酢酸マンガン(III)二水和物 キーワード