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939390

Sigma-Aldrich

氟化钴(II) 四水合物

new

99.9% trace metals basis

同義詞:

Cobalt difluoride hydrate, Cobaltous fluoride tetrahydrate, Difluorocobalt hydrate

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About This Item

線性公式:
CoF2 · 4H2O
CAS號碼:
分子量::
168.99
MDL號碼:

種類

(High purity Salts)

品質等級

化驗

98-102% (complexometric)
99.9% trace metals basis

形狀

powder or crystals

雜質

≤1500 ppm (trace metals analysis)

顏色

faint red to dark red/pink

mp

200 °C

溶解度

water: solubleslightly

密度

2.19 g/mL at 25 °C (lit.)

負離子痕跡

chloride (Cl-): ≤20 ppm

正離子痕跡

Al: <20 ppm
Cu: <20 ppm
Fe: <20 ppm
K: <20 ppm
Mg: <20 ppm
Na: <20 ppm
Pb: <20 ppm

適合性

catalyst

應用

(Catalyst)

SMILES 字串

O.O.O.O.F[Co]F

InChI

1S/Co.2FH.4H2O/h;2*1H;4*1H2/q+2;;;;;;/p-2

InChI 密鑰

MNHUTFNEBYCZAF-UHFFFAOYSA-L

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一般說明

Cobalt(II) fluoride tetrahydrate is a reddish crystalline solid with slight solubility in water. It serves as a source of cobalt for oxygen-sensitive applications. Additionally, it is employed as a catalyst biaryl cross-coupling reactions.

應用

Cobalt(II) fluoride tetrahydrate is used as a starting material to synthesize 2-dimensional cobalt-fluoride-oxide as an oxygen evolution electrocatalysts using a rapid thermal annealing (RTA) method. In this process, the cobalt(II) fluoride tetrahydrate is placed in an alumina furnace at 400°C. After annealing for 20 minutes in air, the alumina crucible is removed and allowed to cool naturally to room temperature. The resulting products are then rinsed multiple times in deionized water and ethanol to remove any soluble impurities. Finally, the product is dried thoroughly in a vacuum oven at 60°C to obtain the 2D nanosheets sample. Furthermore, when combined with N-Heterocyclic Carbenes, Cobalt(II) fluoride tetrahydrate has been found to be highly effective as a catalyst for cross-coupling reactions between aryl Grignard reagents and aryl as well as heteroaryl halides. This reaction results in the formation of unsymmetrical biaryls.

象形圖

Skull and crossbonesCorrosion

訊號詞

Danger

危險分類

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Dam. 1 - Skin Corr. 1B

儲存類別代碼

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable


分析證明 (COA)

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Rapid Thermal Annealing toward High-Quality 2D Cobalt Fluoride Oxide as an Advanced Oxygen Evolution Electrocatalyst
Huang, K. t al.
ACS sustainable chemistry & engineering, 8, 6905?6913-6905?6913 (2020)
Takuji Hatakeyama et al.
Journal of the American Chemical Society, 131(33), 11949-11963 (2009-07-31)
Combinations of N-heterocyclic carbenes (NHCs) and fluoride salts of the iron-group metals (Fe, Co, and Ni) have been shown to be excellent catalysts for the cross-coupling reactions of aryl Grignard reagents (Ar(1)MgBr) with aryl and heteroaryl halides (Ar(2)X) to give

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