Octadecamethylcyclononasiloxane

Base Information

• Chemical Name: Octadecamethylcyclononasiloxane
• CAS No.: 556-71-8
• Molecular Formula: C18H54 O9 Si9
• Molecular Weight: 667.391
• European Community (EC) Number: 834-175-7
• UNII: 28W8JYZ0C6
• DSSTox Substance ID: DTXSID5060308
• Nikkaji Number: J343.978J
• Wikidata: Q27254355
• Mol file: 556-71-8.mol

Synonyms:OCTADECAMETHYLCYCLONONASILOXANE;556-71-8;Cyclononasiloxane, octadecamethyl-;UNII-28W8JYZ0C6;Octadeamethyl-cyclononasiloxane;octadecamethyl-cyclononasiloxane;28W8JYZ0C6;2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-octadecamethyl-1,3,5,7,9,11,13,15,17-nonaoxa-2,4,6,8,10,12,14,16,18-nonasilacyclooctadecane;CYCLOMETHICONE 9;Ctadecamethylcyclononasiloxane;C18H54O9Si9;SCHEMBL9009704;DTXSID5060308;OCTAMETHYLCYCLONONASILOXANE;C18-H54-O9-Si9;MFCD30533789;Octadecamethylcyclooctadecanenonasiloxane;O0425;T72613;Q27254355;2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-Octadecamethylcyclononasiloxane #;CYCLONONASILOXANE, 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-OCTADECAMETHYL-

Chemical Property of Octadecamethylcyclononasiloxane

Chemical Property:

• Vapor Pressure: 9.77E-07mmHg at 25°C
• Melting Point: -27°C(lit.)
• Refractive Index: 1.4050 to 1.4090
• Boiling Point: 415.7°Cat760mmHg
• Flash Point: 198.1°C
• PSA: 83.07000
• Density: 0.98g/cm³
• LogP: 6.46560
• Storage Temp.: Refrigerator, Under inert atmosphere
• Solubility.: Acetonitrile (Slightly), Benzene (Soluble)
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 9
• Rotatable Bond Count: 0
• Exact Mass: 666.16912211
• Heavy Atom Count: 36
• Complexity: 517

Purity/Quality:

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

Octadecamethylcyclononasiloxane >98.0%(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](O[Si](O1)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)C
• Uses: Octamethylcyclononasiloxane is employed as a antibacterial agent. It is particularly effective against marine Bacillus cereus.

Technology Process of Octadecamethylcyclononasiloxane

There total 3 articles about Octadecamethylcyclononasiloxane 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: 43.0%

α,ω-Dichlor-octadecamethyl-nonasiloxan (18537-11-6) → octadecamethyl-cyclononasiloxane (556-71-8)

Guidance literature:

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

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

Reference yield:

dimethylsilicon dichloride (75-78-5,30107-43-8) → octadecamethyl-cyclononasiloxane (556-71-8)

Guidance literature:

With water; at 15 - 20 ℃;

upstream raw materials:

dimethylsilicon dichloride

α,ω-Dichlor-octadecamethyl-nonasiloxan

dodecamethylcyclohexasilane

Refernces

• 1、 -. "High-efficiency macrocyclic dimethyl siloxane compound preparation method". Paragraph 0008; 0023. . Retrieved 2017/10/13.