Potassium pentamethylcyclopentadienide
Potassium pentamethylcyclopentadienide (CAS 94348-92-2; C10H15K; MW 174.32) is a reactive organometallic compound. It serves as a crucial reactant and ligand precursor in advanced inorganic and organometallic synthesis. Primarily utilised in the preparation of low and high-valent uranium compounds, it also finds application in the formation of heterometallic complexes with ytterbium and rare-earth metals, as well as samarium(II) borohydrides. This compound is essential for researchers exploring novel coordination chemistry and catalysis.

Precursor for Uranium Chemistry
Potassium pentamethylcyclopentadienide is used as a starting material for synthesising low and high-valent uranium compounds, enabling research into unique actinide coordination complexes.
Synthesis of Ytterbium Complexes
It serves as a reactant in the formation of heterometallic ytterbium-alkali-metal boratabenzene complexes and sandwich complexes of di- and trivalent ytterbium.
Rare-Earth Metal Coordination
This compound is employed in the synthesis of various rare-earth metal complexes, contributing to the study of lanthanide and actinide chemistry.
Samarium(II) Borohydride Preparation
It acts as a precursor for the synthesis of samarium(II) borohydrides, facilitating research in organometallic samarium chemistry.
Scandium Half-Sandwich Complexes
Potassium pentamethylcyclopentadienide is utilised in the preparation of half-sandwich scandium complexes, important in catalysis and materials science.
| Molecular weight | 174.32 |
|---|---|
| Empirical formula | C10H15K |
| Application | Reactant for synthesis of:• Starting materials for low and high-valent uranium chemistry1• Heterometallic ytterbium-alkali-metal boratabenzene complexes2• Sandwich complexes of di- and trivalent ytterbium3• Samarium(II) borohydrides4• Half-sandwich scandium complexes5• Rare-earth metal complexes6 |
| Melting point | >230 °C(lit.) |

Hazard statements
- H250Catches fire spontaneously if exposed to air
- H261In contact with water releases flammable gas
Precautionary statements
- P222Do not allow contact with air
- P231Handle under inert gas
- P422
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3393 4.2(4.3) |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F |
| Risk statements (R) | 17 |
| Safety statements (S) | 6-16-24-36/37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Potassium pentamethylcyclopentadienide used for?
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Potassium pentamethylcyclopentadienide is used as a reactant in advanced inorganic and organometallic synthesis, particularly for preparing low and high-valent uranium compounds, heterometallic ytterbium-alkali-metal boratabenzene complexes, and rare-earth metal complexes.
What is the CAS number and formula for Potassium pentamethylcyclopentadienide?
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The CAS number is 94348-92-2, and the molecular formula is C10H15K.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Potassium pentamethylcyclopentadienide. The specific grade and purity are typically technical or research grade. TSS does not represent this product as USP, BP, or EP grade.
How should Potassium pentamethylcyclopentadienide be handled safely?
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Potassium pentamethylcyclopentadienide is a pyrophoric solid (H250) and reacts with water or moisture in air (H261). Handling requires stringent exclusion of air and moisture, use of appropriate personal protective equipment including eyeshields, face shields, and suitable respirators, and fire-resistant clothing. It should only be handled under an inert atmosphere.
How is Potassium pentamethylcyclopentadienide packed and shipped?
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As a pyrophoric material, Potassium pentamethylcyclopentadienide is carefully packed under an inert atmosphere and shipped according to strict international regulations for hazardous materials (UN 3393 4.2(4.3)).
How can I request a sample or quote for Potassium pentamethylcyclopentadienide?
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To request a sample or a quote, please contact our sales team through the website or by direct inquiry, providing your specific requirements and delivery location.
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