Octadecamethyloctasilane

Base Information

• Chemical Name: Octadecamethyloctasilane
• CAS No.: 3704-48-1
• Molecular Formula: C18H54Si8
• Molecular Weight: 495.3054
• DSSTox Substance ID: DTXSID90190545
• Nikkaji Number: J772.307E
• Wikidata: Q83062937
• Mol file: 3704-48-1.mol

Synonyms:Octadecamethyloctasilane;3704-48-1;DTXSID90190545

Chemical Property of Octadecamethyloctasilane

Chemical Property:

• Vapor Pressure: 1.06E-05mmHg at 25°C
• Boiling Point: 382.1°Cat760mmHg
• Flash Point: 139.1°C
• Density: 0.809g/cm³
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 7
• Exact Mass: 494.23796400
• Heavy Atom Count: 26
• Complexity: 468

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

• Canonical SMILES: C[Si](C)(C)[Si](C)(C)[Si](C)(C)[Si](C)(C)[Si](C)(C)[Si](C)(C)[Si](C)(C)[Si](C)(C)C

Technology Process of Octadecamethyloctasilane

There total 2 articles about Octadecamethyloctasilane 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:

nonamethyltetrasilyl chloride (51531-19-2) → octadeca-methyloctasilane (3704-48-1)

Guidance literature:

With sodium; In toluene; Yield given;

DOI:10.1246/cl.1997.799

Reference yield:

pentamethylchlorodisilane (1560-28-7) + 1,2-dichlorotetramethylsilane (4342-61-4) → octadeca-methyloctasilane (3704-48-1)

Guidance literature:

With potassium Sodium;

DOI:10.1016/S0022-328X(00)93628-3

Reference yield:

octadeca-methyloctasilane (3704-48-1) + methylmagnesium bromide (75-16-1) → 2,2,3,3-tetrakis(trimethylsilyl)hexamethyltetrasilane (5181-43-1)

Guidance literature:

With aluminium trichloride; Multistep reaction; 1.) C₆H₆, reflux, 10 h, 2.) Et₂O, THF, reflux, 6 h;

DOI:10.1021/ja00406a029

upstream raw materials:

pentamethylchlorodisilane

1,2-dichlorotetramethylsilane

nonamethyltetrasilyl chloride

Downstream raw materials:

2,2,3,3-tetrakis(trimethylsilyl)hexamethyltetrasilane