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DICARBONYLCYCLOPENTADIENYLCOBALT

DICARBONYLCYCLOPENTADIENYLCOBALT Basic information
Reactions
Product Name:DICARBONYLCYCLOPENTADIENYLCOBALT
Synonyms:Cobalt cyclopentadienyl dicarbonyl;Cobalt, dicarbonyl-pi-cyclopentadienyl-;Cyclopentadienyldicarbonylcobalt;Dicarbonyl(eta5-cyclopentadienyl)cobalt;Dicarbonyl-pi-cyclopentadienyl cobalt;eta5-Cyclopentadienylcobalt dicarbonyl;pi-Cyclopentadienylcobalt dicarbonyl;pi-Cyclopentadienyldicarbonylcobalt
CAS:12078-25-0
MF:C7H5CoO25*
MW:180.05
EINECS:235-139-8
Product Categories:metallocene
Mol File:12078-25-0.mol
DICARBONYLCYCLOPENTADIENYLCOBALT Structure
DICARBONYLCYCLOPENTADIENYLCOBALT Chemical Properties
Melting point -22 °C
Boiling point 139-140 °C710 mm Hg(lit.)
density 1.35
refractive index 1.599-1.602
Fp 80 °F
storage temp. 2-8°C
form liquid
color dark red
Specific Gravity1.35
Water Solubility Insoluble in water. Soluble in common organic solvents.
Sensitive Air Sensitive
NIST Chemistry ReferenceCobalt, dicarbonyl(«eta»5-2,4-cyclopentadien-1-yl)-(12078-25-0)
Safety Information
Hazard Codes T
Risk Statements 10-23/24/25-42/43-53-68-40
Safety Statements 23-36/37-45-38-36/37/39-28A-16
RIDADR UN 1992 3/PG 3
WGK Germany 3
F 10-23
HazardClass 6.1
PackingGroup II
HS Code 29319090
MSDS Information
ProviderLanguage
SigmaAldrich English
ACROS English
ALFA English
DICARBONYLCYCLOPENTADIENYLCOBALT Usage And Synthesis
Reactions
  1. Volatile cobalt complex used for the deposition of cobalt and cobalt oxide films.
  2. Intramolecular cobalt-catalyzed [2+2+2] cycloaddition of O-protected diyne-cycanohydrins.
  3. Catalyst used for the dehydrative direct CH allylation with allylic alcohols.
Reactions of 12078-25-0
Chemical Propertiesdark red to brown liquid
UsesDicarbonylcyclopentadienylcobalt Catalyst for the cyclotrimerization of alkynes. It mediates the [2+2+2]-cyclization of allenediynes to tricyclic systems. catalyzes the formation of pyridines from a mixture of alkynes and nitriles.
Purification MethodsBest distilled in an atmosphere of CO in a vacuum. The red brown liquid decomposes slightly on distillation even in a vacuum to liberate some CO. Operations should be performed in an efficient fume cupboard. It is soluble in organic solvents and stable in air but decomposes slowly in sunlight and rapidly under UV. [Piper et al. J Inorg Nucl Chem 1 165 1955, Beilstein 16 IV 1827.] TOXIC.
DICARBONYLCYCLOPENTADIENYLCOBALT Preparation Products And Raw materials
Raw materials1,2,3,4-tetrahydrophthalazine-->carbon monoxide-->Cobalt chloride-->1,3-Cyclopentadiene
Cyclopentadienyl Tris(dimethylamino) Hafnium CpZr(NMe2)3 CpTDMAZ CARBON MONOXIDE Cobaltous nitrate hexahydrate DICARBONYLCYCLOPENTADIENYLCOBALT Cobalt
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