7756-87-8

Basic information

• Product Name: 1,3-DICHLOROTETRAPHENYLDISILOXANE
• Synonyms: 1,3-DICHLOROTETRAPHENYLDISILOXANE;1,3-dichloro-1,1,3,3-tetraphenyl-disiloxan;1,3-dichloro-1,1,3,3-tetraphenyldisiloxane;1,3-Dichloro-1,1,3,3-tetraphenylpropanedisiloxane;Dichlorotetraphenyldisiloxane
• CAS NO: 7756-87-8
• Molecular Formula: C₂₄H₂₀Cl₂OSi₂
• Molecular Weight: 451.49
• EINECS: 231-815-1
• Mol File: 7756-87-8.mol
• Article Data: 4

Chemical Properties

• Melting Point: 36-38°C
• Boiling Point: 238 °C
• Flash Point: >180°C
• Appearance: /solid
• Density: 1.194 g/mL at 25 °C(lit.)
• Vapor Pressure: 9.99E-09mmHg at 25°C
• Refractive Index: n20/D 1.595(lit.)
• CAS DataBase Reference: 1,3-DICHLOROTETRAPHENYLDISILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-DICHLOROTETRAPHENYLDISILOXANE(7756-87-8)
• EPA Substance Registry System: 1,3-DICHLOROTETRAPHENYLDISILOXANE(7756-87-8)

Safety Data

• Hazard Codes: C
• Statements: 34
• Safety Statements: 26-36/37/39-45-27
• RIDADR: 2987
• TSCA: Yes
• Hazardous Substances Data: 7756-87-8(Hazardous Substances Data)

Usage

General Description

1,3-Dichlorotetraphenyldisiloxane is an organosilicon compound with the molecular formula C32H24Cl2O2Si2. It is a white solid that is soluble in organic solvents and is used as a precursor for other organosilicon compounds. This chemical is often used in the production of silicone polymers and as a reagent in organic synthesis. Its structure consists of two silicon atoms connected by an oxygen atom with four phenyl groups and two chlorine atoms attached. 1,3-Dichlorotetraphenyldisiloxane is also known for its high thermal stability and resistance to oxidative degradation, making it a valuable component in the development of materials with robust properties.

InChI:InChI=1/C24H20Cl2OSi2/c25-28(21-13-5-1-6-14-21,22-15-7-2-8-16-22)27-29(26,23-17-9-3-10-18-23)24-19-11-4-12-20-24/h1-20H

Upstream product

• 15545-80-9 1,1,3,3-tetraphenyldisiloxane 
• 80-10-4 diphenylsilyl dichloride 

Downstream Products

• 58110-09-1 1.3-Di-tert.-butylperoxytetraphenyldisiloxan 
• 16069-25-3 2,2-dichloro-4,4,6,6-tetraphenylcyclotrisiloxane 
• 75-77-4 chloro-trimethyl-silane 
• 136745-52-3 pentaphenylboracyclotrisiloxane 
• 141613-72-1 (C₆H₅BO)((C₆H₅)2SiO)3 
• 255849-48-0 O(Si(C₆H₅)2OBO₂C₃H₃(CH₃)2CH(CH₃)2)2 
• 255849-46-8 O(Si(C₆H₅)2OBO₂C₃H₃(CH₃)3)2 
• 255849-47-9 O(Si(C₆H₅)2OB(OC(CH₃)2)2CH₂)2 
• 1092815-51-4 [5]-trovacenyldiphenylsiloxy-diphenylsilanol 
• 1378945-61-9 C₅₀H₄₀N₄O₂Si₄ 
• 18842-38-1 1,1,3,3-tetraphenyl-1,3-di(prop-2-enyl)disiloxane 
• 94593-08-5 1,3-dimethoxy-1,1,3,3-tetraphenyldisiloxane 
• 141613-73-2 (C₆H₅BO)((C₆H₅)2SiO)4 
• 141613-71-0 (C₆H₅BO)2((C₆H₅)2SiO)4 

Relevant articles and documents

Synthesis and characterization of unsymmetrical double-decker siloxane (Basket Cage)

The one-pot synthesis of an unsymmetrical double-decker siloxane with a novel structure via the reaction of double-decker tetrasodiumsilanolate with 1 equiv. of dichlorotetraphenyldisiloxane in the presence of an acid is reported herein for the first time. The target compound bearing all phenyl substituents on the unsymmetrical siloxane structure was successfully obtained, as confirmed by 1H-NMR, 13C-NMR, 29Si-NMR, IR, MALDI-TOF, and X-ray crystallography analyses. Additionally, the thermal properties of the product were evaluated by TG/DTA and compared with those of other siloxane cage compounds.

Stereochemistry of the reaction of cis,trans,cis-2,4,6,8-tetraisocyanato-2, 4,6,8-tetramethylcyclotetrasiloxane with triphenylsilanol and 1,1,3,3-tetraphenyldisiloxane-1,3-diol

All-cis-2,4,6,8-tetramethyl-2,4,6,8-tetrakis(triphenylsiloxy) cyclotetrasiloxane (4) and syn-1,3,9,11-tetramethyl-5,5,7,7,13,13,15,15- octaphenyltricyclo[9.5.1.13,9]octasiloxane (5) were synthesized by the reaction of cis,trans,cis-[MeSi(NCO)O]4 (1) with Ph 3SiOH (2) and [Ph2Si(OH)]2O (3), respectively, in the presence of pyridine for the sake of investigating the synthesis of ladder polysilsesquioxanes with perfect siloxane frameworks. Their stereostructures were confirmed by nuclear magnetic resonance spectra and X-ray crystallography, which revealed that 4 and 5 did not retain the stereostructure of the precursor 1. This result was caused by the racemization of 1 with pyridine, and a subsequent nucleophilic substitution reaction of 1 with 2 or 3, including inversion and retention of the configuration at the silicon atoms.