ビス(2,4-ペンタンジオナト)ニッケル(II)水和物

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H317：アレルギー性皮膚反応を起こすおそれ

  H334：吸入するとアレルギー、喘息または、呼吸困難 を起こすおそれ

  H341：遺伝性疾患のおそれの疑い

  H350：発がんのおそれ

• 注意書き

  P201：使用前に取扱説明書を入手すること。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P301+P312：飲み込んだ場合：気分が悪い時は医師に連絡する こと。

  P308+P313：暴露または暴露の懸念がある場合：医師の診断/手当てを 受けること。

ビス(2,4-ペンタンジオナト)ニッケル(II)水和物 価格

MSDS Information

• Bis(2,4-pentanediono)nickel

ビス(2,4-ペンタンジオナト)ニッケル(II)水和物 化学特性,用途語,生産方法

• 特徴

  NiO6八面体の向かい合った面をそれぞれ隣のNiO6八面体と共有して三量体を形成．Ni（中心）－O 198～209 pm，Ni（外側）－O 193～222 pm(Mn, Zn化合物でも同様の化合物がある）

• 化学的特性

  Nickel(II) acetylacetonate Ni(CH3COCHCOCH3)2, is obtained as emerald green crystals by dehydration of the dihydrate at 50°C in vacuum; it has an unusual trimeric structure in the solid state. The dihydrate Ni(CH3COCH3)2.2H2O is prepared by the addition of acetylacetone to solutions of nickel(II) salts in the presence of a weak base such as sodium acetate. Nickel(II) acetylacetonate is soluble in organic solvents and finds use in the synthesis of organometallic compounds such as nickelocene and bis(cyclooctadiene) nickel. It is also industrially important as a catalyst component in the oligomerization of alkenes and in the conversion of acetylene to cyclooctatetraene.

• 使用

  Nickel(II) acetylacetonate is usefully soluble in organic solvents and is therefore used in the Grignard synthesis of nickelocene from cyclopentadienyl magnesium halides. More ionic nickel(II) salts such as the thiocyanate can be reacted with potassium cyclopentadienide in liquid ammonia.

• 製造方法

  Nickel(II) acetylacetonate is isolated as the dihydrate Ni(acac)2·2H2O from aqueous solutions of nickel(II) salts in the presence of acetylacetone and a weak base such as sodium acetate; it is readily dehydrated to the green anhydrous compound at 50° in vacuo. From ammoniacal solutions of nickel(II) salts the diammoniate Ni(acac)2·2NH3 precipitates; this also readily evolves the two extra ligands to give the green acetylacetonate.

• 安全性プロファイル

  Confirmed human carcinogen. Poison by intraperitoneal route. When heated to decomposition it emits acrid smoke and irritating fumes.

• 純化方法

  Wash the green solid with H2O, dry it in a vacuum desiccator and recrystallise it from MeOH. [Charles & Pawlikowski J Phys Chem 62 440 1958.] The complex can be conveniently dehydrated by azeotropic distillation with toluene, and the crystals may be isolated by concentrating the toluene solution. [Wilkinson et al. J Am Chem Soc 76 1970 1954, Beilstein 1 IV 3677.]

• 参考文献

  G.J. Bullen, R. Mason, P. Pauling, Inorg. Chem., 4, 456 (1965), DOI: 10.1021/ic50026a005.

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