4617-27-0

Basic information

• Product Name: 1,1,3,3-tetrachloro-1,3-dimethyldisiloxane
• Synonyms: 1,1,3,3-tetrachloro-1,3-dimethyldisiloxane;1,1,3,3-Tetrachloro-1,3-dimethylpropanedisiloxane;Einecs 225-025-6;1,3-Dimethyl-1,1,3,3-Tetrachlorodisiloxane
• CAS NO: 4617-27-0
• Molecular Formula: C₂H₆Cl₄OSi₂
• Molecular Weight: 244.05144
• EINECS: 225-025-6
• Mol File: 4617-27-0.mol

Chemical Properties

• Melting Point: -22 °C
• Boiling Point: 146.2°Cat760mmHg
• Flash Point: 37.1°C
• Appearance: /
• Density: 1.319g/cm³
• Vapor Pressure: 5.91mmHg at 25°C
• Refractive Index: 1.452
• CAS DataBase Reference: 1,1,3,3-tetrachloro-1,3-dimethyldisiloxane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,3,3-tetrachloro-1,3-dimethyldisiloxane(4617-27-0)
• EPA Substance Registry System: 1,1,3,3-tetrachloro-1,3-dimethyldisiloxane(4617-27-0)

Safety Data

• Hazardous Substances Data: 4617-27-0(Hazardous Substances Data)

Usage

Uses

Used in Chemical Industry:
1,1,3,3-Tetrachloro-1,3-dimethyldisiloxane is used as a precursor for the production of silicon-based solvents, which are essential in various chemical processes and applications.
Used in Pharmaceutical Industry:
In the pharmaceutical industry, 1,1,3,3-Tetrachloro-1,3-dimethyldisiloxane is utilized in the preparation of silicon derivates, which can be further used in the synthesis of pharmaceutical compounds.
Used in Catalyst Applications:
1,1,3,3-Tetrachloro-1,3-dimethyldisiloxane is employed as a catalyst in a range of chemical reactions, facilitating and enhancing the efficiency of these processes.

InChI:InChI=1/C2H6Cl4OSi2/c1-8(3,4)7-9(2,5)6/h1-2H3

Upstream product

• 18165-33-8 1,3-dichloro-1,3-dimethyldisiloxane 
• 75-79-6 Methyltrichlorosilane 
• 676-58-4 methylmagnesium chloride 
• 75-54-7 Dichloromethylsilane 
• 3555-43-9 dichlorotetramethyldisiloxane 
• 807-28-3 1,3-Dimethyl-1,1,3,3-tetraphenyldisiloxan 

Downstream Products

• 373-74-0 methyltrifluorosilane 

Relevant articles and documents

3,5-Dimethylpyrazolyl-Substituted Di- and Trisiloxanes

The synthesis and characterization of di- and trisiloxanes with 3,5-dimethylpyrazolyl (pz*) moieties are presented. Disiloxanes of the type O(SiMe3–npz*n)2(n = 1, 2, and 3 in 2, 3, and 4, respectively) are easily accessible through a trans-silylation approach. Crystal structure analyses of compound 4 and the two side products 5 and 6 illustrate different coordination motifs of pz* (terminal vs. bridging) in the disiloxane system. The reaction of O2Si3Cl8with Me3Sipz* led to the unsymmetrically substituted trisiloxane pz*3SiO-Sipz*2O-SiCl2pz* (7) with bridging pz* units and tetra- and pentacoordinate silicon atoms and the fully pyrazolyl-substituted trisiloxane O2Si3pz*8(8), depending on the choice of the reaction conditions. The29Si NMR properties of 7 were investigated by29Si CP/MAS NMR spectroscopy and supporting quantum chemical calculations analyzing the principal components of the chemical-shift tensor for all three silicon atoms in this molecule.

Generation and capture of alkylchlorosilanones

Alkyltrichlorosilanes react with DMSO (molar ratio 1 : 1, 0 °C) to give cyclic oligoalkylchlorosiloxanes of the general formula [R(Cl)SiO]n (where R = Me or Et; n = 3-6). With an excess of alkyltrichlorosilane (2 : 1), linear oligoalkylchlorosiloxanes Cl[R(Cl)SiO]mSiCl2R (where R = Me or Et; m = 1-5) are also formed. In the presence of hexamethyldisiloxane (molar ratio Cl3SiR : DMSO : (Me3Si)2O = 1 : 1 : 2, 20 °C), the reaction products are both cyclic and linear oligoalkyl(trimethylsilyloxy)siloxanes [R(Me3SiO)SiO]n (n = 3-5) and Me3Si[OSi(OSiMe3)R]mOSiMe3 (m = 1-3), respectively. The reaction of DMSO with trichloro(vinyl)silane and hexamethyldisiloxane occurs in a similar manner. A plausible scheme of formation of the final products via intermediate alkylchlorosilanones RClSi=O and alkyl(trimethylsilyloxy)silanones is discussed.