Bis(butylcyclopentadienyl)tungsten(IV) dibromide
Bis(butylcyclopentadienyl)tungsten(IV) dibromide (CAS 90023-17-9) is an organotungsten metallocene complex with the molecular formula C18H26Br2W and a molecular weight of 586.05 g/mol. Supplied as a defined solid with a melting point of 83-87 °C, it pairs a tungsten(IV) centre with two butyl-substituted cyclopentadienyl ligands and two bromide groups. It is used principally as a research-grade precursor in organometallic synthesis, catalysis studies and tungsten-based materials chemistry.
- Synonyms
- Bis(butylcyclopentadienyl)tungsten(IV) dibromideBis(n-butylcyclopentadienyl)tungsten dibromideDibromobis(butylcyclopentadienyl)tungsten(IV)Bis(butylcyclopentadienyl)dibromotungstenCAS 90023-17-9
Organometallic synthesis precursor
Serves as a defined tungsten(IV) building block for preparing other organotungsten complexes. The reactive bromide ligands offer convenient sites for ligand exchange and further functionalisation.
Catalysis and inorganic chemistry research
Used in laboratory investigations of tungsten coordination chemistry and catalytic behaviour. The butyl-substituted cyclopentadienyl framework supports studies of metallocene reactivity and stability.
Tungsten materials and thin-film studies
Volatile butylcyclopentadienyl tungsten complexes of this class are of interest as molecular precursors for tungsten-containing films and coatings in materials research. Suitability should be confirmed for each specific deposition process.
Reference and method-development reagent
Applied as a well-characterised organometallic standard in analytical method development and academic teaching laboratories where a defined tungsten source is required.
| Molecular weight | 586.05 |
|---|---|
| Empirical formula | C18H26Br2W |
| Assay | 98% |
| Melting point | 83-87 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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(butylcyclopentadienyl)tungsten(IV) dibromide used for?
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It is used chiefly as a research-grade organotungsten precursor for organometallic synthesis, catalysis and tungsten coordination chemistry studies, and as a molecular precursor of interest in tungsten-based materials research. It is supplied for laboratory and industrial research use, not for clinical or consumer applications.
What is the CAS number and molecular formula of Bis(butylcyclopentadienyl)tungsten(IV) dibromide?
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Its CAS number is 90023-17-9 and its empirical formula is C18H26Br2W (Hill notation), with a molecular weight of 586.05 g/mol. The MDL number is MFCD10567402, and the material has a reported melting point of 83-87 °C.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound at a typical assay of 98% as a technical/research-grade organometallic reagent. We do not represent it as USP, BP or EP pharmacopoeial grade. A Certificate of Analysis accompanies each batch, and detailed specifications are available on request.
How should Bis(butylcyclopentadienyl)tungsten(IV) dibromide be handled and stored safely?
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Handle only with appropriate personal protective equipment: eye shields, gloves and an N95 (US) or P1 (EN 143) respirator filter where dust may form. The material is classified WGK 3 (Germany), indicating a severe hazard to waters, so it must be kept out of drains, soil and watercourses and disposed of as regulated chemical waste. Always consult the Safety Data Sheet before use.
How is Bis(butylcyclopentadienyl)tungsten(IV) dibromide packed, shipped and exported?
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It is packed in tightly sealed, labelled containers sized to the order, from gram quantities to bulk research volumes, with packaging chosen to protect the material in transit. As a specialist exporter since 1998, Tech Serve Solutions ships worldwide with full documentation and Certificate of Analysis, observing applicable transport and customs requirements.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, purity and destination, and our team will respond with availability, lead time and a formal quotation. Samples can be arranged for qualified laboratory and industrial customers subject to availability.
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