PENTAMETHYLDISILOXANE

Base Information

• Chemical Name: PENTAMETHYLDISILOXANE
• CAS No.: 1438-82-0
• Molecular Formula: C5H16OSi2
• Molecular Weight: 148.352
• Hs Code.: 29319090
• European Community (EC) Number: 215-873-5
• DSSTox Substance ID: DTXSID00883673
• Mol file: 1438-82-0.mol

Synonyms:Disiloxane,pentamethyl- (6CI,7CI,8CI,9CI);1,1,1,3,3-Pentamethyldisiloxane;1,1,3,3,3-Pentamethyldisiloxane;Dimethyl(trimethylsiloxy)silane;Dimethyl(trimethylsilyloxy)silane;Pentamethyldisiloxane;Trimethylsiloxydimethylsilane;

Chemical Property of PENTAMETHYLDISILOXANE

Chemical Property:

• Refractive Index: n20/D 1.373
• Boiling Point: 84.5 °C at 760 mmHg
• Flash Point: 4.9 °C
• PSA: 9.23000
• Density: 0.760 g/mL at 20 °C(lit.)
• LogP: 1.82130
• Sensitive.: Moisture Sensitive
• Water Solubility.: Not miscible or difficult to mix in water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 1
• Rotatable Bond Count: 2
• Exact Mass: 147.06614317
• Heavy Atom Count: 8
• Complexity: 65.3

Purity/Quality:

97.0% ^*data from raw suppliers

Pentamethyldisiloxane ^*data from reagent suppliers

Safty Information:

• Pictogram(s): F
• Hazard Codes: F
• Statements: 11
• Safety Statements: 16-23-24/25

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: C[Si](C)O[Si](C)(C)C
• Uses: Pentamethyldisiloxane, is an organosilicon compound used in synthesis of siloxane-polyether copolymer surfactants. Pentamethyldisiloxane can also be used as source of the trimethylsilyl functional group in organic synthesis. Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis.

Technology Process of PENTAMETHYLDISILOXANE

There total 15 articles about PENTAMETHYLDISILOXANE 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: 92.0%

methoxypentamethyldisiloxane (18156-38-2) → 1,1,1,3,3-pentamethyl-1,3-disiloxane (1438-82-0)

Guidance literature:

With diisobutylaluminium hydride; In diethyl ether; from -60 deg C to room temp.;

Reference yield: 90.0%

1,1,3,3-Tetramethyldisiloxane (3277-26-7) + Hexamethyldisiloxane (107-46-0) → 1,1,1,3,3-pentamethyl-1,3-disiloxane (1438-82-0)

Guidance literature:

With trifluorormethanesulfonic acid; Ambient temperature;

DOI:10.1016/0022-328X(91)83058-C

Reference yield: 80.0%

1-chloro-1,1,3,3,3-pentamethyldisiloxane (2943-62-6) → 1,1,1,3,3-pentamethyl-1,3-disiloxane (1438-82-0)

Guidance literature:

With lithium aluminium tetrahydride; In diethyl ether; for 1h; from -78 deg C to room temp.;

upstream raw materials:

Dichloromethylsilane

chloro-trimethyl-silane

dimethylmonochlorosilane

methylmagnesium chloride

Downstream raw materials:

1,1,1,3,3-pentamethyl-3-(3-(oxiran-2-ylmethoxy)propyl)disiloxane

1,1,1-trimethyl-3,3-dimethyl-3-(2-phenylethyl)disiloxane

<1-(2-methylpropenoyloxy)propyl>pentamethyldisiloxane

1,2-bis(1,1-3,3,3-pentamethyldisiloxanyl)ethane

Refernces

• 1、 Swint, S. A.,Buese, Mark A.. "A disiloxane equilibration approach to the preparation and characterization of 5,5'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bisbicycloheptane-2,3-dicarboxylic anhydride". . p. 145 - 153. Retrieved 1991.
• 2、 Andrianov,K.A. et al.. "-". . . Retrieved 1975.
• 3、 -. "1,1,1,3,3,5,5-heptamethyltrisiloxane preparation method". Paragraph 0015; 0016. . Retrieved 2016/11/21.
• 4、 Kochina,Vrazhnov,Sinotova,Ignat'ev. "Gas-phase reaction of free diethylsilylium ions with hexamethyldisiloxane". . p. 708 - 710. Retrieved 2007/10/03.