Bis(tri-tert-butylphosphine)palladium(0)
CAS 53199-31-8
Pd(P(t-Bu)₃)₂ is an electron-rich, coordinatively unsaturated Pd(0) complex used where conventional Pd/phosphine systems fail — most notably cross-couplings of unactivated aryl chlorides at low catalyst loading.
Typical specification
| Molecular formula | C₂₄H₅₄P₂Pd |
|---|---|
| Molecular weight | 511.06 |
| Assay (Pd complex) | ≥ 98% |
| Palladium content | 20.3 – 21.0% |
| Appearance | Off-white to pale-yellow crystalline powder |
| Melting point | ~102 °C (dec.) |
| Solubility | Soluble in THF, toluene, benzene; decomposes in chlorinated solvents over time |
| Packaging atmosphere | Argon |
| HS code (export) | 2843900099 |
Lot-specific COA issued with every shipment. SDS and ICP elemental impurity data available on request.
Where Pd(P(t-Bu)₃)₂ is used
Cross-coupling of aryl chlorides
The strongly σ-donating, bulky P(t-Bu)₃ ligands promote oxidative addition into C–Cl bonds, enabling Suzuki–Miyaura and Negishi couplings of inexpensive aryl chloride substrates that are unreactive toward Pd(PPh₃)₄, often at 0.5–1 mol% loading and mild temperature.
Buchwald–Hartwig amination
A workhorse pre-catalyst for C–N bond formation in API route development — couplings of aryl halides with primary and secondary amines, including sterically hindered partners, without a separate ligand charge.
OLED intermediate synthesis
Used in carbazole, triarylamine and fluorene chemistry for hole-transport and emitter intermediates, where low residual Pd and reproducible activity matter for downstream sublimation-grade purity.
Storage and shipping
Storage. Store cold (2–8 °C) under inert gas; air- and moisture-sensitive. Handle under nitrogen or argon.
Shipping. Ships under inert atmosphere in sealed ampoules or septum bottles. Transport classification confirmed per shipment.
Packaging. 1 g · 5 g · 25 g · 100 g · Bulk (custom, under argon)
Synonyms
- Pd(t-Bu3P)2
- Bis(tri-t-butylphosphine)palladium
- Palladium bis(tri-tert-butylphosphine)
- Pd[P(tBu)3]2
- Tri-tert-butylphosphine palladium(0) complex
Frequently asked questions
How is Pd(P(t-Bu)₃)₂ priced?
Quotes are built from the day's palladium fixing plus a fabrication charge, so pricing tracks the metal market transparently. Lock-in against a specific fixing date is available on confirmed orders.
Do you take back spent catalyst?
Yes. We operate a palladium recovery loop: spent catalyst and Pd-containing residues can be assayed and credited against your next purchase, which lowers total cost of ownership versus one-way supply.
What documentation ships with the product?
Every lot ships with a certificate of analysis (assay, Pd content, appearance) and an SDS. Elemental impurity data (ICP) is available for pharmaceutical customers on request.
What is the typical lead time?
Stock items ship within 5 working days. Most other grades are 2–3 weeks ex-Shanghai, and the exact lead time is confirmed in writing with your quote — tell us your required date and we will commit to it.