Description

Tetrakis(Diphenylphosphinoethyl)-Tetramethylcyclotetrasiloxane is a sophisticated organosilicon compound featuring multiple phosphine ligands, designed for advanced catalytic and material science applications. Its unique hybrid structure combines the stability of a siloxane ring with the versatile coordination chemistry of phosphine groups, making it a valuable precursor for creating highly active and selective catalysts. This product is essential for researchers and manufacturers in the fields of homogeneous catalysis, polymer science, and the development of novel functional materials.

Application

• Homogeneous Catalysis: Acts as a multidentate ligand for transition metals (e.g., Pd, Pt, Rh) in cross-coupling reactions, hydrogenation, and hydroformylation.
• Polymer Modification: Used as a functional cross-linker or co-monomer to introduce phosphine groups into silicone or organic polymer backbones, enhancing material properties.
• Advanced Material Synthesis: Serves as a building block for creating metal-organic frameworks (MOFs), hybrid organic-inorganic materials, and dendritic catalysts.
• Surface Functionalization: Applied to modify silica or other oxide surfaces with phosphine groups for supported catalyst systems.
• Pharmaceutical Intermediate Synthesis: Employed in the synthesis of complex molecules where its catalytic properties enable key bond-forming steps.
• Electronics and Optoelectronics: Potential use in the development of materials for organic light-emitting diodes (OLEDs) or as a component in conductive polymers.

Basic Information

Product Name	Tetrakis(Diphenylphosphinoethyl)-Tetramethylcyclotetrasiloxane
CAS No.	124998-64-7
Molecular Formula	C68H76O4P4Si4
Molecular Weight	1218.6 g/mol
Synonyms	1,3,5,7-Tetramethyl-2,4,6,8-tetrakis[2-(diphenylphosphino)ethyl]cyclotetrasiloxane; Tetramethylcyclotetrasiloxane, tetrakis(2-(diphenylphosphino)ethyl)-; Cyclotetrasiloxane, 2,4,6,8-tetramethyl-2,4,6,8-tetrakis[2-(diphenylphosphino)ethyl]-; Phosphine-functionalized cyclotetrasiloxane; P4-Tetrasiloxane ligand
EINECS	Contact for details

Quality Control

Our Tetrakis(Diphenylphosphinoethyl)-Tetramethylcyclotetrasiloxane is produced under controlled conditions to ensure high purity and batch-to-batch consistency. Each lot undergoes rigorous analytical testing, including NMR (¹H, ³¹P, ²⁹Si) and HPLC analysis, to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. For long-term stability, store under an inert atmosphere (argon or nitrogen) at 2-8°C. This compound is easily oxidized and moisture-sensitive; ensure the container is sealed tightly after each use to minimize exposure to air and humidity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Phosphorus Content	10.0 - 10.5 % (w/w)
Loss on Drying	≤ 1.0 %
Residue on Ignition	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.