Bis(cyclopentadienyl)hafnium(IV) dichloride
Bis(cyclopentadienyl)hafnium(IV) dichloride (CAS 12116-66-4), also known as hafnocene dichloride, is an organohafnium compound with the formula C10H10Cl2Hf and a molecular weight of 379.58 g/mol. Supplied as a crystalline solid of 98% assay, this bent metallocene is a versatile hafnium source and precursor in coordination and organometallic chemistry. It is used principally as a catalyst component for olefin polymerisation and in the synthesis of related hafnocene derivatives.
- IUPAC
- Di(cyclopentadienyl)hafnium(IV) dichloride,Hafnocene dichloride
- Synonyms
- Bis(cyclopentadienyl)hafnium(IV) dichlorideDi(cyclopentadienyl)hafnium(IV) dichlorideHafnocene dichlorideDicyclopentadienylhafnium dichlorideDichlorobis(cyclopentadienyl)hafnium(IV)Cp2HfCl2
Metallocene polymerisation catalysis
Serves as a hafnocene pre-catalyst for the polymerisation and oligomerisation of olefins, typically activated with co-catalysts such as methylaluminoxane (MAO). Hafnium-based metallocenes are valued for producing polyolefins with controlled molecular weight and stereochemistry.
Organohafnium synthesis
Acts as a convenient starting material for preparing other hafnocene complexes through substitution of the chloride ligands. The reactive Hf–Cl bonds allow conversion to hafnocene alkyls, hydrides and related derivatives.
Hafnium precursor in coordination chemistry
Used as a well-defined molecular source of hafnium(IV) in research-scale coordination and organometallic studies. The bent sandwich structure provides a stable, soluble platform for ligand exchange chemistry.
Materials and thin-film research
Investigated as a hafnium-bearing molecular precursor in materials chemistry, where hafnium compounds are of interest for high-permittivity (high-k) oxide and ceramic studies. Specific suitability should be confirmed for the intended process.
| Molecular weight | 379.58 |
|---|---|
| Empirical formula | C10H10Cl2Hf |
| Assay | 98% |
| Melting point | 230-233 °C(lit.) |
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)hafnium(IV) dichloride used for?
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It is used chiefly as a metallocene (hafnocene) catalyst component for olefin polymerisation and oligomerisation, usually in combination with an aluminoxane co-catalyst, and as a precursor for synthesising other organohafnium complexes. It also serves as a defined hafnium(IV) source in coordination and materials research.
What is the CAS number and molecular formula of Bis(cyclopentadienyl)hafnium(IV) dichloride?
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The CAS number is 12116-66-4 and the molecular formula is C10H10Cl2Hf, with a molecular weight of 379.58 g/mol. It is also identified by EC number 235-177-5 and MDL number MFCD00001438.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bis(cyclopentadienyl)hafnium(IV) dichloride at 98% assay as a research and reagent-grade material. We do not represent it as a USP, BP or EP pharmacopoeial grade. A Certificate of Analysis accompanies each batch, and specifications can be confirmed against your requirements on request.
What are the safety and handling precautions for this compound?
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It is classified under GHS07 with the signal word Warning and carries hazard statements H315 (causes skin irritation), H319 (causes serious eye irritation) and H335 (may cause respiratory irritation). Handle with gloves, eye protection and an N95-type dust mask, avoid dust formation, and work with adequate ventilation. Always consult the Safety Data Sheet before use.
How is Bis(cyclopentadienyl)hafnium(IV) dichloride packed, shipped and exported?
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It is packed in tightly sealed, moisture-resistant containers with sizes from research quantities to bulk, labelled in line with GHS requirements. Tech Serve Solutions exports worldwide with full documentation, including the Certificate of Analysis and Safety Data Sheet, in compliance with applicable transport regulations.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, packaging and destination, and our team will provide a quotation and lead time. Samples can be arranged for evaluation where appropriate, subject to availability and regulatory requirements.
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