Bis(cyclopentadienyl)niobium(IV) dichloride
Bis(cyclopentadienyl)niobium(IV) dichloride (CAS 12793-14-5), also known as niobocene dichloride, is an organometallic niobium complex with the formula C10H10Cl2Nb and a molar mass of 294.00 g/mol. This bent-metallocene compound features two cyclopentadienyl ligands bound to a niobium(IV) centre. Tech Serve Solutions supplies it as a research-grade reagent (95% assay) for use as a catalyst and synthetic precursor in organometallic chemistry, materials science and vapour-deposition applications.
- IUPAC
- Di(cyclopentadienyl)niobium(IV) dichloride,Niobocene dichloride
- Synonyms
- Bis(cyclopentadienyl)niobium(IV) dichlorideDi(cyclopentadienyl)niobium(IV) dichlorideNiobocene dichlorideDichlorobis(cyclopentadienyl)niobium(IV)Niobocene(IV) dichlorideCAS 12793-14-5

Polymerisation catalysis
Used as a catalyst in olefin polymerisation and in controlled (chain-growth) polymerisation reactions. Its metallocene framework provides a defined niobium centre suited to organometallic catalysis.
Reductive elimination chemistry
Serves as a catalyst and reagent in reductive elimination reactions, supporting the study and development of niobium-mediated transformations in synthetic organometallic chemistry.
Organometallic and inorganic synthesis
Acts as a versatile niobocene building block for preparing other niobium organometallic complexes and for fundamental studies in catalysis and inorganic chemistry.
Materials science and thin-film precursor
Of interest as a niobium source within the broad family of vapour-deposition (CVD/ALD) precursors and in materials-science research aimed at niobium-containing films and materials.
Research and reference reagent
Supplied as a defined organometallic reagent for laboratory research, method development and reference work in academic and industrial settings.
| Molecular weight | 294.00 |
|---|---|
| Empirical formula | C10H10Cl2Nb |
| Assay | 95% |
| Application | Catalyst for:• Chain growth in controlled polymerization reactions1• Reduction elimination reactions2• Olefin polymerization reactions3 |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 Bis(cyclopentadienyl)niobium(IV) dichloride used for?
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It is used mainly as an organometallic catalyst and synthetic precursor. Documented uses include catalysing olefin polymerisation, controlled chain-growth polymerisation and reductive elimination reactions, alongside roles in catalysis, inorganic synthesis, materials science and vapour-deposition (CVD/ALD) precursor research.
What is the CAS number and molecular formula of Bis(cyclopentadienyl)niobium(IV) dichloride?
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The CAS number is 12793-14-5 and the molecular formula is C10H10Cl2Nb (Hill notation), with a molecular weight of 294.00 g/mol. Its MDL number is MFCD00009949 and PubChem Substance ID 24855779. It is also known as niobocene dichloride.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bis(cyclopentadienyl)niobium(IV) dichloride as a research/technical-grade reagent with a typical assay of 95%. We do not represent this material as USP, BP or EP pharmacopoeia grade. A specification or certificate of analysis can be provided on request to confirm batch values.
What are the safety and handling requirements?
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It is classified GHS07 with the signal word Warning. The hazard statements are H315 (causes skin irritation), H319 (causes serious eye irritation) and H335 (may cause respiratory irritation). Use a type N95 dust mask, eye shields and gloves, avoid dust formation (P261), and on eye contact rinse cautiously with water (P305+P351+P338). Consult the SDS before use. It carries a German water-hazard class of WGK 3 (highly hazardous to water).
How is Bis(cyclopentadienyl)niobium(IV) dichloride packed, shipped and exported?
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It is packed in suitably sealed, labelled containers appropriate to the order quantity and despatched with full documentation, including the SDS and certificate of analysis. As a specialist exporter since 1998, Tech Serve Solutions arranges compliant global shipping; packaging and pack sizes can be tailored to your requirements.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, pack size and destination, and our team will respond with availability, lead time and a quotation. Samples can be discussed for qualified applications.
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