Bis(cyclopentadienyl)cobalt
Synonym: Bis(cyclopentadienyl)cobalt(II), C10H10Co, Co(C5H5)2
CAS Number 1277-43-6 | EC Number 215-061-0 | MDL Number MFCD00013749
| Product code | CO7436 |
| CAS # | 1277-43-6 |
| Assay (purity) | 98.5%+ |
| Purity method | by elemental analysis:%C=62.6-64.5; %H=5.3-5.4 |
| Molecular weight | 189.12 |
| Form | solid |
| Appearance | black powder or crystals |
| Melting point | 176-180 °C (dec.) (lit.) |
| Molecular formula | C10H10Co |
| Linear formula | Co(C5H5)2 |
Bis(cyclopentadienyl)cobalt, also known as Cobaltocene or Cp₂Co, is an organocobalt compound with the molecular formula C₁₀H₁₀Co and a molecular weight of 189.12 g/mol. This compound features cobalt in a +2 oxidation state, coordinated with two cyclopentadienyl ligands in a sandwich structure that stabilizes its chemical reactivity. Bis(cyclopentadienyl)cobalt appears as a black powder or crystalline solid with a purity of 99%, as determined by elemental analysis. It is stable under controlled conditions but requires careful handling due to its sensitivity to heat and potential to decompose above 176–180°C.
Applications in Organic and Inorganic Synthesis
Cobaltocene is widely used in organic and inorganic synthesis, particularly as a single-electron reducing agent in redox reactions. Its structure, characterized by the presence of two cyclopentadienyl ligands bound to cobalt, makes it an effective reagent in electron transfer processes. This property is exploited in synthetic chemistry for applications in catalysis and polymerization, especially for reactions that require controlled redox behavior.
Precautions for Safe Storage and Handling
With hazard classifications H228-2, H317, H334, H341, and H351, Bis(cyclopentadienyl)cobalt is flammable and potentially harmful upon inhalation or skin contact. Handling requires the use of protective gloves, goggles, and dust masks in a well-ventilated area to avoid inhalation of fine particles. Storage should be in sealed, moisture-free containers away from direct sunlight and sources of heat, as the compound may decompose at elevated temperatures.
Industrial and Laboratory Applications
In industrial and laboratory settings, Bis(cyclopentadienyl)cobalt serves as a reliable reducing agent and catalyst in advanced synthesis, including organometallic reactions and material development. It is particularly useful in research focused on electronic materials and specialty polymers, where it supports controlled reduction and complex formation. The compound’s stability under specific conditions and its electron-rich cobalt center make it valuable in high-tech applications in chemical synthesis and materials science.
Bis(cyclopentadienyl)cobalt is manufactured and sold in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. Additional technical, research and safety (SDS) information is available. For additional analytical information or details about purchasing Bis(cyclopentadienyl)cobalt contact us at sales@ereztech.com
Safety Information
| UN | 1325 |
| Hazardous class | 4.1 |
| Packing group | III |
| Pictograms |   |
| Signal word | danger |
| Hazard statements | H228 – H334 – H317 – H341 – H351 |
| Precautionary statements | P201 – P202 – P280 – P284 – P210 – P261 – P272 (OSHA) – P308 + P313 – P304 + P341 (OSHA) – P342 + P311 – P302 + P352 + P363 – P333 + P313 – P405 – P501 |
| Transport description | FLAMMABLE SOLID, ORGANIC, N.O.S. (Cobaltocene) |
| 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 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 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 Bis(cyclopentadienyl)cobalt below please contact customer support at sales@ereztech.com
Lot# 032/089 Lot# 031/370Lot# 031/315Lot# 029/206
External identifiers for Bis(cyclopentadienyl)cobalt
| Pubchem CID | 22045960 |
| SMILES | C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C.[Ta+5] |
| IUPAC Name | CobaltoceneBis(η5-cyclopentadienyl)cobalt |
| InchI Identifier | InChI=1S/2C5H5.Co/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2 |
| InchI Key | PXFGMRZPRDJDEK-UHFFFAOYSA-N |
Known applications and external links
- King, R. B. (1965). Organometallic Syntheses. 1. New York, NY: Academic Press.
- Antipin, M. Yu.; Boese, R.; Augart, N.; Schmid, G. (1993). “Redetermination of the cobaltocene crystal structure at 100 K and 297 K: Comparison with ferrocene and nickelocene”. Struct. Chem. 4 (2): 91–101 doi:10.1007/BF00677370.
- Elschenbroich, C.; Salzer, A. (1992). Organometallics: A Concise Introduction (2nd ed.). Weinheim: Wiley-VCH. ISBN 978-3-527-28165-7
With Bis(cyclopentadienyl)cobalt other customers often ask:
- Dicarbonylcyclopentadienylcobalt
- Bis(pentamethylcyclopentadienyl)cobalt
- Bis(cyclopentadienyl)cobalt(II) hexafluorophosphate
- Bis(ethylcyclopentadienyl)cobalt
Ereztech synthesizes and sells additional Co-compounds.
To purchase Bis(cyclopentadienyl)cobalt contact us at sales@ereztech.com
