ジアセトキシ水銀(II) 化学特性,用途語,生産方法
外観
白色, 結晶～結晶性粉末
溶解性
水に可溶 (25g/100g水, 10℃), エタノールに可溶。エタノール、酢酸、酢酸エステルに可溶。水100cm3には、25g(0℃)、約100g(100℃、分解を伴う)溶ける。
用途
塩基のハロゲン化水素塩の定量(非水滴定)。
用途
ファインセラミックスの製造原科。
使用上の注意
純度は金属ベースで差数法によって算出したもので、重量又は容量分析等の化学的方法によるものではありません。使用目的により、正確な含量が必要な場合は、それらの方法によって測定する必要があります。
説明
Mercury (II) acetate is the chemical compound with the formula Hg(O
2CCH
3)
2. Commonly abbreviated Hg (OAc)
2, this compound is employed as a reagent to generate organomercury compounds from unsaturated organic precursors.
化学的特性
Mercuric acetate, Hg(C2H3O2)2 , is a toxic, light-sensitive white powder, soluble in water,alcohol,and acetic acid. On exposure to heat, mercuric acetate produces toxic fumes of mercury/mercuric oxide. Mercuric acetate is incompatible with chromic acid, chromic anhydride, nitric acid, perchloric acid, permanganates, sodium peroxide, potassium hydroxide, hydrogen peroxides, acid anhydrides, and strong oxidising agents.
物理的性質
Mercury(II) acetate is a crystalline solid consisting of isolated Hg(OAc)
2 molecules with Hg-O distances of 2.07 ?. Three long, weak intermolecular Hg···O bonds of about 2.75 ? are also present,resulting in a slightly distorted square pyramidal coordination geometry at Hg.
使用
Mercuric acetate is used as an oxidizing agent in organic synthesis. It is used in oxymercuration of double bonds. Mercuric acetate is used in non-aqueous titration. It is employed in the manufacture of phenyl mercury compounds which have pharmaceutical applications. It removes the acetamidomethyl protecting group from protected thiol, and converts thiocarbonate esters into dithiocarbonates. It promotes the addition of hydroxide and alkoxide across carbon-carbon double bonds.
反応性
Arenes undergo "mercuration" upon treatment with Hg(OAc)
2. The one acetate group that remains on mercury can be displaced by chloride :
C
6H
5OH + Hg(OAc)
2 → C
6H
4(OH)-2-HgOAc + HOAc
C
6H
4(OH)-2-HgOAc + NaCl → C
6H
4(OH)-2-HgCl + NaOAc
The Hg
2+ center binds to alkenes, inducing the addition of hydroxide and alkoxide. For example, treatment of methylacrylate with mercuric acetate in methanol gives an α - mercuri ester :
Hg(OAc)
2 + CH
2 = CHCO
2CH
3 + CH
3OH → CH
3OCH
2CH(HgOAc)CO
2CH
3+ HOAc
Mercury(II) has a high affinity for sulfur ligands. Hg (OAc)
2 can be used as a reagent to remove the acetamidomethyl protecting group, which is used to "protect" thiol groups in organic synthesis. Similarly Hg(OAc)
2 is a standard reagent to convert thiocarbonate esters into dithiocarbonates:
(RS)
2C=S + H
2O + Hg(OAc)
2 → (RS)
2C=O + HgS + 2 HOAc
Mercury (II) acetate is used for oxymercuration reactions.
一般的な説明
White crystalline solid with an odor of vinegar. Sensitive to light. Density 3.25 g / cm3. Toxic by inhalation (dust, etc.) and by ingestion.
空気と水の反応
Water soluble. Decomposed by water to form a yellow insoluble product.
反応プロフィール
MERCURIC ACETATE is incompatible with acetylene, ammonia, chlorine dioxide, azides, calcium (amalgam formation), sodium carbide, lithium, rubidium, and copper .
危険性
Toxic by ingestion, inhalation, and skin
absorption; strong irritant.
健康ハザード
MERCURIC ACETATE may cause death by hypovolemic shock or kidney failure. Chronic exposure may lead to kidney failure.
火災危険
When heated to decomposition, MERCURIC ACETATE emits toxic fumes of mercury. Avoid light.
安全性プロファイル
Poison by ingestion,
intravenous, intraperitoneal, and
subcutaneous routes. Moderately toxic by
skin contact. An experimental teratogen.
Experimental reproductive effects. Mutation
data reported. When heated to
decomposition it emits toxic fumes of Hg.
See also MERCURY COMPOUNDS.
職業ばく露
Mercuric acetate is used chiefly for
mercuration of organic compounds; for the absorption ofethylene; as a chemical intermediate for phenylmercuric
acetate; a mildewcide; and other organomercury compounds. It is used as a catalyst in organic synthesis; and in
the manufacture of pharmaceuticals.
輸送方法
UN1629 Mercury acetate, Hazard Class: 6.1;
Labels: 6.1-Poisonous materials.
純化方法
Recrystallise it from glacial acetic acid. POISONOUS. [Beilstein 2 IV 114.]
不和合性
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. Light and heat can cause
decomposition.
ジアセトキシ水銀(II) 上流と下流の製品情報
原材料
準備製品