Dicarbonylcyclopentadienyl cobalt(I)

Synonym: Cobalt dicarbonyl cyclopentadiene, CpCo(CO)₂, Cyclopentadienyl cobalt(I) dicarbonyl, Cyclopentadienylcobalt dicarbonyl, Cyclopentadienyldicarbonylcobalt

CAS Number 12078-25-0 | MDL Number MFCD00009589 | EC Number 235-139-8

Product code	CO8250
CAS number	12078-25-0
Assay (purity)	99%+
Purity method	by GC
Molecular weight	180.05
Form	liquid
Appearance	dark red liquid
Boiling point	139-140 °C/710 mmHg (lit.)
Sensitivity	air
Molecular formula	C7H5CoO2
Linear formula	C5H5Co(CO)2
Packaging	glassware/metal containers/bubblers

Dicarbonylcyclopentadienyl cobalt(I), also known as Cobalt dicarbonyl cyclopentadiene or CpCo(CO)₂, is an organocobalt compound with the molecular formula C₇H₅CoO₂ and a molecular weight of 180.05 g/mol. In this structure, cobalt is in the +1 oxidation state, coordinated with two carbonyl (CO) ligands and one cyclopentadienyl (Cp) ring. This dark red liquid, with a purity of 99.5% determined by gas chromatography, is moisture-sensitive and should be stored in a cold environment to maintain stability.

Applications in Organic and Inorganic Synthesis

Cyclopentadienyl cobalt(I) dicarbonyl serves as a valuable precursor in organometallic chemistry, often used in catalysis and synthesis. Its structure, featuring both carbonyl and cyclopentadienyl ligands, makes it ideal for applications in reaction pathways requiring cobalt-centered catalysis.

Precautions for Safe Storage and Handling

Dicarbonylcyclopentadienyl cobalt(I) is a flammable and toxic liquid with hazard codes H226, H301, H311, H317, H331, H334, H341, H351, and H413. Standard protective gear, including gloves, goggles, and respiratory protection, is recommended to prevent inhalation and skin contact. Proper ventilation and cold storage away from ignition sources are necessary for safe handling.

Industrial and Laboratory Applications

This compound is essential in catalysis research and material science, where its unique structure aids in the formation of specialized cobalt-based materials. It is frequently utilized in the development of complex organometallic catalysts, supporting advanced applications in synthesis and chemical transformations.

Dicarbonylcyclopentadienyl cobalt  is useful reagent, catalyst, and precursor material. It is applied in thin film deposition, industrial chemistry, pharmaceuticals, LED manufacturing, and others. Synthesis of CpCo(CO)₂ are described in literature (see the links below).

Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing Dicarbonylcyclopentadienylcobalt contact us at sales@ereztech.com

Safety information

UN	1992
Hazardous class	3(6.1)
Packing group	III
Pictograms
Signal word	DANGER
Hazard statements	H226-H301-H311-H317-H331-H334-H341-H351-H413
Precautionary statements	P201-P202-P210-P233-P240-P241-P242-P243-P261-P264-P270-P271-P272-P273-P280-P285-P301 + P310-P302 + P352-P303 + P361 + P353-P304 + P340-P308 + P313-P311-P330-P333 + P313-P342 + P311-P363-P370 + P378-P403 + P233 + P235-P405
Transport description	FLAMMABLE LIQUID, TOXIC, N.O.S. (Dicarbonyl(η5-2,4-cyclopentadien-1-yl)cobalt)
In TSCA registry	No (sold for research and development usage only)

First Aid Measures

General advice	Consult a physician. Show this safety data sheet to the doctor in attendance. Move out of the dangerous area.
Eye contact	Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Skin contact	Wash off with soap and plenty of water. Consult a physician.
Inhalation	If breathed in, move person into the fresh air. If not breathing, give artificial respiration. Consult a physician.
If swallowed	Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

Certificates of Analysis (CoA)

If you don’t see the needed lot of Dicarbonylcyclopentadienylcobalt below please contact customer support at sales@ereztech.com

External identifiers for CpCo(CO)₂

Pubchem CID	11986239
SMILES	[C-]#[O+].[C-]#[O+].[CH-]1C=CC=C1.[Co]
IUPAC Name	carbon monoxide; cobalt; cyclopenta-1,3-diene
InchI Identifier	InChI=1S/C5H5.2CO.Co/c1-2-4-5-3-1;2*1-2;/h1-5H;;;/q-1;;;
InchI Key	AEVRNKXPLOTCBW-UHFFFAOYSA-N

Known applications and external links

• • Vollhardt, K. Peter C. (1984). “Cobalt-assisted [2+2+2] cycloadditions: a synthesis strategy grows to maturity”. Angewrdte Chemie.
  • Staeb, T.H.; Chavez, J.; Gleiter, R.; Nuber, Bernhard (2005). “The Role of [η2-Bis(tert-butylsulfonyl)acetylene](carbonyl)(η⁵-cyclopentadienyl) cobalt(I) as an Intermediate in the Alkyne Dimerisation”. Eur. J. Inorg. Chem.2005 (20): 4090.
  • Pauson, P.L. “Dicarbonyl(cyclopentadienyl)cobalt(I).” Encyclopedia of Reagents for Organic Synthesis. 2001.

With Dicarbonylcyclopentadienylcobalt other customers often ask:

• Bis(cyclopentadienyl)cobalt
• Bis(pentamethylcyclopentadienyl)cobalt
• Cobalt tricarbonyl nitrosyl
• Bis(pentamethylcyclopentadienyl)cobalt hexafluorophosphate

Ereztech synthesizes and sells additional Co-compounds.

To purchase Dicarbonylcyclopentadienylcobalt  contact us at sales@ereztech.com