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8.02540

Sigma-Aldrich

Cobalt(II) chloride anhydrous

for synthesis

别名:

Cobalt(II) chloride anhydrous, Cobalt dichloride

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About This Item

经验公式（希尔记法）:
Cl2Co
CAS号:
7646-79-9
分子量:
129.84
MDL號碼:
MFCD00010938
分類程式碼代碼:
12352302
酶委員會索引編號:
231-589-4
NACRES:
NA.22

等級

anhydrous

品質等級

200

形狀

powder

效力

418 mg/kg LD50, oral (Rat)

mp

735 °C

溶解度

soluble 585.9 g/L

密度

3.36 g/cm3 at 25 °C

儲存溫度

2-30°C

InChI

1S/2ClH.Co/h2*1H;/q;;+2/p-2

InChI 密鑰

GVPFVAHMJGGAJG-UHFFFAOYSA-L

應用

Cobalt(II) chloride anhydrous (CoCl2) can be used as a catalyst in organic synthesis for the transformation of the various functional groups. For example, synthesis of esters via cleavage of ethers by acyl chlorides; acylation of alcohols and amines by anhydrides; and regioselective cleavage of oxiranes. It is also used to synthesize mixed acetals by the addition reaction between alcohols and vinyl ethers.
CoCl2 can be used as a catalyst:
  • For the dealkylation of tertiary amines.
  • In the synthesis of thioketones and thioaldehydes via thionation of carbonyl compounds in the presence of bis(trimethylsilyl) sulfide.
  • In the oxidation of aromatic and aliphatic aldehydes to carboxylic acids in the presence of molecular oxygen and acetic anhydride.
  • In the stereoselective opening of epoxides with N-substituted anilines.

CoCl2 can also be used as:
  • A precursor to synthesize magnetic cobalt nanorods via decomposition of the cobalt coordination complex.
  • A catalyst to prepare acid anhydrides by the reaction of acid chlorides with carboxylic acids.
  • A reagent in the carbon-carbon bond-forming reactions involving active methylene compounds.

分析報告

Assay (argentometric): ≥ 98.0 %
Water (K. F.): ≤ 2.0 %

訊號詞

Danger

危險分類

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Dam. 1 - Muta. 2 - Repr. 1B - Resp. Sens. 1 - Skin Sens. 1

儲存類別代碼

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

水污染物質分類（WGK）

WGK 3

閃點（°F）

Not applicable

閃點（°C）

Not applicable

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Cobalt (II) chloride catalyzed syntheses of acid anhydrides from acid chlorides
Srivastava RR and Kabalka GW
Tetrahedron Letters, 33(5) (1992)

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