14920-92-4

Basic information

• Product Name: 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane
• Synonyms: 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane
• CAS NO: 14920-92-4
• Molecular Formula: C₁₁H₂₀OSi₂
• Molecular Weight: 224.4469
• EINECS: -0
• Mol File: 14920-92-4.mol
• Article Data: 14

Chemical Properties

• Melting Point: <-80 °C
• Boiling Point: 212.5°C at 760 mmHg
• Flash Point: 67.9°C
• Appearance: /
• Density: 0.89g/cm³
• Vapor Pressure: 0.251mmHg at 25°C
• Refractive Index: 1.465
• Storage Temp.: 2-8°C
• CAS DataBase Reference: 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane(14920-92-4)
• EPA Substance Registry System: 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane(14920-92-4)

Safety Data

• Hazardous Substances Data: 14920-92-4(Hazardous Substances Data)

Usage

Description

1,1,1,3,3-Pentamethyl-3-phenyldisiloxane, a chemical compound with the molecular formula C16H26OSi2, is a colorless liquid at room temperature. It serves as a crucial building block in the synthesis of silicone polymers, known for its versatility and stability in various applications.

Uses

Used in Silicone Polymer Synthesis:
1,1,1,3,3-Pentamethyl-3-phenyldisiloxane is used as a building block for the synthesis of silicone polymers, contributing to the development of materials with unique properties such as heat resistance, flexibility, and chemical stability.
Used in Adhesive and Sealant Production:
In the adhesive and sealant industry, 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane is used as a crosslinking agent for silicone rubbers, enhancing their bonding strength and durability.
Used in Protective Coatings for Electronic Components:
1,1,1,3,3-Pentamethyl-3-phenyldisiloxane is utilized as a protective coating for electronic components, providing insulation and resistance to environmental factors such as moisture and heat.
Used in Automotive and Construction Industries:
As a coating additive, 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane is employed in the automotive and construction industries to improve the performance and longevity of coatings, offering enhanced resistance to weathering and mechanical stress.
Used in Advanced Material Production:
1,1,1,3,3-Pentamethyl-3-phenyldisiloxane may be used as a surface modifier in the production of advanced materials, allowing for the tailoring of surface properties to meet specific requirements in various applications.
Used in Personal Care Product Formulation:
In the personal care industry, 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane is used in the formulation of products, providing benefits such as improved texture, spreadability, and skin feel.
Safety Precautions:
It is important to handle 1,1,1,3,3-Pentamethyl-3-phenyldisiloxane with care, as it may cause irritation to the skin, eyes, and respiratory system upon contact or inhalation. Proper safety measures should be taken during its use to minimize potential health risks.

InChI:InChI=1/C11H20OSi2/c1-13(2,3)12-14(4,5)11-9-7-6-8-10-11/h6-10H,1-5H3

Upstream product

• 1825-62-3 ethyl trimethylsilyl ether 
• 1825-58-7 dimethyl(ethoxy)phenylsilane 
• 107-46-0 Hexamethyldisiloxane 
• 56-33-7 1,1,3,3-tetramethyl-1,3-diphenyldisiloxane 
• 75-77-4 chloro-trimethyl-silane 
• 768-33-2 phenyldimethylsilyl chloride 
• 5796-98-5 bis-trimethylsilanyl peroxide 
• 766-77-8 Dimethylphenylsilane 
• 1130-17-2 1,1,1,2,2-pentamethyl-2-phenyldisilane 
• 5272-18-4 dimethylphenylsilanol 
• 2004-14-0 lithium trimethylsilanolate 
• 1825-61-2 Trimethylmethoxysilane 
• 7647-01-0 hydrogenchloride 
• 7664-93-9 sulfuric acid 

Downstream Products

• 454-57-9 fluorodimethylphenylsilane 
• 420-56-4 trimethylsilyl fluoride 
• 13247-99-9 bromo-dimethyl-phenyl-silane 
• 71-43-2 benzene 

Relevant articles and documents

Novel fluoride ion mediated synthesis of unsymmetrical siloxanes under phase transfer catalysis conditions

Unsymmetrical siloxanes have been prepared from silanols or hydrosilanes using phase transfer catalytic (PTC) systems Me3 SiN3-CsF-18-crown-6-toluene or Me3SiN 3-CsF-18-crown-6-H2O-toluene, correspond

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DMF-activated chlorosilane chemistry: Molybdenum-catalyzed reactions of R3SiH, DMF and R′3SiCl to initially form R′3SiOSiR′3 and R3SiCl

The room temperature reactions between R3SiH (R3?=?Et3, PhMe2, Ph2Me) and R′3SiCl (R′3?=?Me3, PhMe2, Ph2Me), with an excess of dimethylformamide (DMF) in the presence of (Me3N)Mo(CO)5 as a catalyst, result in the initial formation of R3SiCl, R′3SiOSiR′3 and Me3N as detected by 29Si, 13C, 1H NMR spectroscopy and GC/MS. As the reaction proceeds, the more so if the reaction temperature is raised, mixed disiloxanes R3SiOSiR′3 and ultimately lesser amounts of R3SiOSiR3 may be detected. A mechanism involving the activation of chlorosilanes by the nucleophilic DMF is proposed to produce transient imminium siloxy ion pairs, [Me2N[dbnd]CHCl]+[R′3SiO]? ? [Me2N[dbnd]CH(OSiR′3)]+Cl? which react with R3SiH to form Me2NCH2OSiR′3 and R3SiCl. A secondary reaction of Me2NCH2OSiR′3 with R′3SiCl produces the symmetrical disiloxane R′3SiOSiR′3 and ClCH2NMe2. The final stage of the reaction is the reduction of ClCH2NMe2 by R3SiH, a reaction which is reported for the first time. The newly created chlorosilane R3SiCl can become involved in the initial DMF activation chemistry thereby forming the other disiloxanes observed as the reaction proceeds.

Pd/C-catalyzed cross-coupling reaction of benzyloxysilanes with halosilanes for selective synthesis of unsymmetrical siloxanes

A new protocol for the nonhydrolytic synthesis of unsymmetrical siloxanes has been developed. The cross-coupling reaction of benzyloxysilanes with halosilanes catalyzed by Pd/C afforded various unsymmetrical siloxanes with co-production of benzyl halides. the Partner Organisations 2014.

Silylation of silanols with vinylsilanes catalyzed by a ruthenium complex

A new ruthenium complex-catalyzed O-silylation of silanols with vinylsilanes leading to siloxane bond formation with the evolution of ethylene is described. A maximum conversion of silanol is reached using an excess of vinylsilane to also yield the product of the homo-coupling of the latter. Under the optimum conditions, when vinylsilane with at least one ethoxy substituent is used, the reaction gives exclusively unsymmetrical siloxanes.