Hexadecamethylcyclooctasiloxane

Base Information

• Chemical Name: Hexadecamethylcyclooctasiloxane
• CAS No.: 556-68-3
• Molecular Formula: C16H48 O8 Si8
• Molecular Weight: 593.236
• European Community (EC) Number: 209-137-2
• UNII: 2YAW49T07J
• DSSTox Substance ID: DTXSID0060305
• Nikkaji Number: J188.413A
• Wikidata: Q27160001
• Mol file: 556-68-3.mol

Synonyms:HEXADECAMETHYLCYCLOOCTASILOXANE;556-68-3;Cyclooctasiloxane, hexadecamethyl-;UNII-2YAW49T07J;Hexadecamethyl-cyclooctasioxane;hexadecamethyl-cyclooctasiloxane;2YAW49T07J;2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-1,3,5,7,9,11,13,15-octaoxa-2,4,6,8,10,12,14,16-octasilacyclohexadecane;EINECS 209-137-2;CYCLOMETHICONE 8;Hexadecamethylcycloctasiloxane;SCHEMBL450212;C16H48O8Si8;DTXSID0060305;CHEBI:87984;C16-H48-O8-Si8;MFCD30725759;AKOS030227996;H1288;Q27160001;2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-Hexadecamethylcyclohexadecaneoctasiloxane;2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-Hexadecamethylcyclooctasiloxane #;CYCLOOCTASILOXANE, 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-HEXADECAMETHYL-

Chemical Property of Hexadecamethylcyclooctasiloxane

Chemical Property:

• Vapor Pressure: 0.0037mmHg at 25°C
• Melting Point: 31.5°C
• Refractive Index: 1.4060
• Boiling Point: 290°Cat760mmHg
• Flash Point: 175.2°C
• PSA: 73.84000
• Density: 0.97g/cm³
• LogP: 5.74720
• Storage Temp.: Refrigerator
• Solubility.: Benzene, Chloroform (Slightly)
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 8
• Rotatable Bond Count: 0
• Exact Mass: 592.15033076
• Heavy Atom Count: 32
• Complexity: 450

Purity/Quality:

≥99% ^*data from raw suppliers

Hexadecamethylcyclooctasiloxane >96.0%(GC) ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: C[Si]1(O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)C
• Uses: Hexadecamethylcyclooctasiloxane is a major component of the crude extract of Bacillus cereus S1 that exhibits antibacterial activity against five bacterial pathogens.

Technology Process of Hexadecamethylcyclooctasiloxane

There total 7 articles about Hexadecamethylcyclooctasiloxane 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: 56.0%

C16H48Cl2O7Si8 → hexadecamethylcyclooctasiloxane (556-68-3)

Guidance literature:

In diethyl ether; water; at 20 - 30 ℃; Alkaline conditions;

Reference yield: 22.0%

1,1,3,3-Tetramethyldisiloxane (3277-26-7) + dodecamethyl-cyclohexasiloxane (540-97-6) → tetradecamethylcycloheptasiloxane (107-50-6) + hexadecamethylcyclooctasiloxane (556-68-3) + iododimethylsilane (2441-21-6)

Guidance literature:

With iodine;

Reference yield:

dodecamethylcyclohexasilane (4098-30-0) → tetradecamethylcycloheptasiloxane (107-50-6) + hexadecamethylcyclooctasiloxane (556-68-3) + octadecamethyl-cyclononasiloxane (556-71-8) + Hexamethylcyclotrisiloxane (541-05-9) + octamethylcyclotetrasiloxane (556-67-2) + decamethylcyclopentasiloxane (541-02-6) + dodecamethyl-cyclohexasiloxane (540-97-6) + 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15-hexadecamethyloctasiloxane-1,15-diol (4938-87-8) + 1,1,3,3,5,5,7,7,9,9,11,11-dodecamethylhexasiloxane-1,11-diol (4029-00-9) + C30H92O16Si15 + eicosamethylcyclodecasiloxane (18772-36-6) + tetracosamethyl cyclododecasiloxane (18919-94-3) + Tricontamethylcyclopentadecasiloxan (23523-14-0) + α,ω-Dihydroxy-tetradecamethyl-heptasiloxan (3195-63-9) + Docosamethylcycloundecasiloxane (18766-38-6) + α,ω-Dihydroxy-polydimethylsiloxan + hexacosamethyl-cyclotridecasiloxane (23732-94-7) + Octacosamethylcyclotetradeca-siloxane (149050-40-8) + α,ω-Dihydroxy-octadecamethyl-nonasiloxan (18678-58-5) + 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17,19,19,21,21,23,23,25,25,27,27,29,29,31,31-dotriacontamethylhexadecasiloxane-1,31-diol + Dotriacontamethylcyclohexadecasiloxane + tetratriacontamethylcycloheptadecasiloxane + C22H68O12Si11 + C24H74O13Si12 + C34H104O18Si17 + permethyldecasiloxane-1,19-diol + C28H86O15Si14

Guidance literature:

dodecamethylcyclohexasilane; With potassium tert-butylate; In tetrahydrofuran; at 20 ℃; for 0.5h; Inert atmosphere; Schlenk technique;

With hydrogen; C₆₂H₅₁N₂Ni₂^(1-)*K⁽¹⁺⁾*2C₄H₁₀O₂; In tetrahydrofuran; at 45 ℃; for 24h; under 1500.15 Torr; Schlenk technique;

With water; In tetrahydrofuran; at -40 - 20 ℃; for 12h; Schlenk technique;

DOI:10.1002/anie.201907525

upstream raw materials:

diethoxy dimethylsilane

dimethylsilicon dichloride

1,1,3,3-Tetramethyldisiloxane

dodecamethyl-cyclohexasiloxane

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