1,7-Dichlorooctamethyltetrasiloxane

Base Information

• Chemical Name: 1,7-Dichlorooctamethyltetrasiloxane
• CAS No.: 2474-02-4
• Deprecated CAS: 104042-85-5,37281-05-3,37281-05-3
• Molecular Formula: C8H24Cl2O3Si4
• Molecular Weight: 351.525
• Hs Code.: 29319090
• European Community (EC) Number: 219-597-6
• DSSTox Substance ID: DTXSID3062449
• Nikkaji Number: J216.112E
• Wikidata: Q72467193
• Mol file: 2474-02-4.mol

Synonyms:1,7-Dichlorooctamethyltetrasiloxane;2474-02-4;Tetrasiloxane, 1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-;1,7-Dichloro-octamethyltetrasiloxane;1,7-Dichloro-1,1,3,3,5,5,7,7-octamethyltetrasiloxane;chloro-[[[chloro(dimethyl)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilane;Tetrasiloxane,1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-;MFCD00045148;SCHEMBL523534;DTXSID3062449;CAA47402;EINECS 219-597-6;AKOS015913482;1,7-Dichlorooctamethylheptanetetrasiloxane;BS-43953;1,7-Dichloro-octamethyltetrasiloxane, 95%;D5267;FT-0634306;D90380;J-015653;1,7-dichloro-1,1,3,3,5,5,7,7-octamethyl-tetrasiloxane

Chemical Property of 1,7-Dichlorooctamethyltetrasiloxane

Chemical Property:

• Vapor Pressure: 0.0421mmHg at 25°C
• Melting Point: -62 °C(lit.)
• Refractive Index: n20/D 1.405(lit.)
• Boiling Point: 246.6 °C at 760 mmHg
• Flash Point: 87.8 °C
• PSA: 27.69000
• Density: 1.017 g/cm³
• LogP: 4.32100
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 3
• Rotatable Bond Count: 6
• Exact Mass: 350.0179561
• Heavy Atom Count: 17
• Complexity: 246

Purity/Quality:

98%,99%, ^*data from raw suppliers

1,7-Dichloro-octamethyltetrasiloxane ^*data from reagent suppliers

Safty Information:

• Pictogram(s): C
• Hazard Codes: C
• Statements: 34
• Safety Statements: 26-36/37/39-45

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Toxic Gases & Vapors -> Chlorosilanes
• Canonical SMILES: C[Si](C)(O[Si](C)(C)O[Si](C)(C)Cl)O[Si](C)(C)Cl

Technology Process of 1,7-Dichlorooctamethyltetrasiloxane

There total 12 articles about 1,7-Dichlorooctamethyltetrasiloxane which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 83.0%

1,1,3,3,5,5,7,7-octamethyltetrasiloxane (1000-05-1) → 1,7-dichlorooctamethyltetrasiloxane (2474-02-4)

Guidance literature:

With trichloroisocyanuric acid; In tetrahydrofuran; at -20 ℃; for 0.25h; Inert atmosphere; Schlenk technique;

DOI:10.1016/j.jorganchem.2018.08.022

Reference yield: 49.0%

dimethylsilicon dichloride (75-78-5,30107-43-8) → 1,1,3,3-tetramethyl-1,3-dichlorodisiloxane (2401-73-2) + 1,5-dichlorohexamethyltrisiloxane (3582-71-6) + 1,7-dichlorooctamethyltetrasiloxane (2474-02-4)

Guidance literature:

With dimethyl sulfoxide; at 0 - 20 ℃; for 3h; Reagent/catalyst; Solvent;

DOI:10.1134/S001250081308003X

Reference yield: 25.8%

dimethylmonochlorosilane (1066-35-9) + octamethylcyclotetrasiloxane (556-67-2) → 1,7-dichlorooctamethyltetrasiloxane (2474-02-4) + 1,1,3,3,5,5,7,7,9,9,11,11-dodecamethylhexasiloxane (995-82-4) + 1-chloro-1,1,3,3,5,5,7,7,9,9-decamethylpentasiloxane (132118-76-4)

Guidance literature:

With water; pyrographite; for 4h; Ambient temperature;

DOI:10.1246/cl.1990.2133

upstream raw materials:

dimethylsilicon dichloride

dimethylmonochlorosilane

octamethylcyclotetrasiloxane

acetyl chloride

Downstream raw materials:

1,1,3,3,5,5,7,7-octamethyltetrasiloxane-1,7-diol

1,1,3,3,5,5,7,7-octamethyltetrasiloxane

1,7-Dibutyloxy-octamethyl-tetrasiloxan

(C₆H₅BO)((CH₃)2SiO)4

Refernces

• 1、 Basenko,Soldatenko,Voronkov. "Efficient method for the synthesis of symmetrical α,ω-dichloro- 1,1,3,3-tetraorganyldisiloxanes". . p. 203 - 206. Retrieved 2013/09/23.
• 2、 Voronkov, M. G.,Tsyrendorzhieva, I. P.,Ivanova, N. P.,Dubinskaya, E. I.. "A New Method for Generation of Dimethylsilanone under Mild Conditions". . p. 658 - 659. Retrieved 2007/10/03.