1,1,1,3,5,5,5-Heptamethyltrisiloxane

Base Information

• Chemical Name: 1,1,1,3,5,5,5-Heptamethyltrisiloxane
• CAS No.: 1873-88-7
• Molecular Formula: C7H22O2Si3
• Molecular Weight: 222.507
• Hs Code.: 29319090
• European Community (EC) Number: 217-496-1
• UNII: RVY9659R8C
• DSSTox Substance ID: DTXSID1038795
• ChEMBL ID: CHEMBL3988892
• Mol file: 1873-88-7.mol

Synonyms:1,1,1,3,5,5,5-Heptamethyltrisiloxane;1873-88-7;Bis(trimethylsiloxy)methylsilane;Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-;methyl-bis(trimethylsilyloxy)silicon;heptamethyl trisiloxane;UNII-RVY9659R8C;RVY9659R8C;DTXSID1038795;Methylbis(trimethylsilyloxy)silane;EINECS 217-496-1;EC 217-496-1;26403-67-8;Methicone (20 CST);DSSTox_CID_18795;DSSTox_RID_82383;DSSTox_GSID_47501;Hptso//Heptamethyltrisiloxane;SCHEMBL41518;di(trimethylsiloxy)methylsilane;Kf 99;UNII-6777U11MKT;CHEMBL3988892;DTXCID9018795;SIB-1844;Tox21_301069;Tox21_302481;MFCD00048000;AKOS015840182;CS-W014234;HEPTAMETHYL TRISILOXANE [USP-RS];NCGC00248277-01;NCGC00254970-01;NCGC00256718-01;BS-15733;CAS-1873-88-7;CAS-9004-73-3;FT-0626916;H1267;Trisiloxano, 1,1,1,3,5,5,5-heptametil-;S09300;Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-,

Chemical Property of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

Chemical Property:

• Appearance/Colour: Colourless liquid
• Vapor Pressure: 8.5hPa at 25℃
• Melting Point: <0 °C
• Refractive Index: n20/D 1.382(lit.)
• Boiling Point: 163.8 °C at 760 mmHg
• Flash Point: 52.8 °C
• PSA: 18.46000
• Density: 0.819 g/cm³
• LogP: 2.53970
• Storage Temp.: 15-25°C
• Water Solubility.: Miscible with acetone, ethanol, diethyl ether. Insoluble in water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 4
• Exact Mass: 221.08493451
• Heavy Atom Count: 12
• Complexity: 121

Purity/Quality:

99.5%min ^*data from raw suppliers

Heptamethyl trisiloxane ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi
• Hazard Codes: Xi
• Statements: 10-36/37/38
• Safety Statements: 26-36

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: C[Si](O[Si](C)(C)C)O[Si](C)(C)C
• Uses: Heptamethyltrisiloxane is used to catalyze reduction reactions in organic syntheses. 1,1,1,3,5,5,5-Heptamethyltrisiloxane is a Basic material for synthetic polyalkyleneoxide modified heptamethyltrisiloxane which is a kind of specific structure surfactant for pesticide additives, coating additives, etc. Bis(trimethylsiloxy)methylsilane is an important raw material and intermediate used in organic synthesis, pharmaceutical and dyestuff. 1,1,1,3,5,5,5-Heptamethyltrisiloxane can be used for the aromatic C-H silylation of arenes in the presence of a platinum complex catalyst.It can also be used as a reagent to synthesize: 3-Octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, an agricultural adjuvant and sensory performance enhancer used in cosmetic formulations.Isoindigo-based conjugated polymer with siloxane-terminated solubilizing group.Monosiloxy esters with a variety of acids.
• Description: Bis (trimethylsiloxy) methylsilane acts as an important raw material and intermediate used in organic synthesis, pharmaceutical and dyestuff. For example, it can be used for the platinum-catalyzed aromatic C-H silylation of arenes. It can also be used for the silylation of aryl iodides.

Technology Process of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

There total 15 articles about 1,1,1,3,5,5,5-Heptamethyltrisiloxane 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: 68.0%

Dichloromethylsilane (75-54-7) + chloro-trimethyl-silane (75-77-4) → 1,1,1,3,5,5,5-heptamethyltrisiloxan (1873-88-7)

Guidance literature:

With Methamphetamin; In diethyl ether; for 1h;

Reference yield: 59.0%

Dichloromethylsilane (75-54-7) + sodium trimethylsilanolate (18027-10-6) → 1,1,1,3,5,5,5-heptamethyltrisiloxan (1873-88-7)

Guidance literature:

In diethyl ether; for 10h; Heating;

DOI:10.1007/BF00949632

Reference yield: 34.0%

Dichloromethylsilane (75-54-7) + Trimethylsilanol (1066-40-6) → 1,1,1,3,5,5,5-heptamethyltrisiloxan (1873-88-7)

Guidance literature:

With pyridine; In hexane; at -30 - 20 ℃; for 16h;

DOI:10.1007/s11172-016-1449-1

upstream raw materials:

Dichloromethylsilane

chloro-trimethyl-silane

Hexamethyldisiloxane

1,3,5,7,9-pentamethylcyclopentasiloxane

Downstream raw materials:

1-bis(trimethylsilyloxy)methylsilyl-3-(oxiran-2-ylmethoxy)-1-propanol

1,1,1,3,5,5,5-heptamethyl-3-phenethyltrisiloxane

silylcyclohexane

ethyl trimethylsilyl ether

Refernces

Synthesis, characterization, and catalytic activity of a well-defined rhodium siloxide complex immobilized on silica

10.1002/anie.200704362

The research focuses on the synthesis, characterization, and catalytic activity of a well-defined rhodium siloxide complex immobilized on silica. The study explores the properties of siloxide as an ancillary ligand in TM-O-Si systems, particularly for catalysis in reactions such as polymerization, olefin metathesis, epoxidation of alkenes, and dehydrogenative coupling of silanes. The researchers synthesized a rhodium siloxide complex by reacting the molecular rhodium siloxide precursor [{Rh(μ-OSiMe3)(cod)}2] with aerosil silica. The resulting surface organometallic complex was characterized using solid-state NMR spectroscopy and elemental analysis, revealing the presence of (μ-SiO)Rh(H)SiMe2Ph surface organometallic complexes. The catalytic activity of the complex was tested in hydrosilylation reactions of 1-alkenes and vinylsiloxanes using heptamethylhydrotrisiloxane as a model of (poly)hydrosiloxanes. The catalysts demonstrated high effectiveness and stability, maintaining activity even after multiple recycling tests. The research suggests that the silanol groups in the complex contribute to the high stability of the heterogeneous catalyst, allowing for reuse without a decrease in yield or selectivity.

Palladium-catalyzed hiyama couplings of α-silylenoates and α-silylenamides

10.1021/ol301300r

The research focuses on the Hiyama couplings of R-silylenoates and R-silylenamides, which are sensitive substrate classes that require specific conditions for high yield coupling products. The purpose of this study was to develop a method for the cross-coupling of these electron-deficient vinylsilanes, utilizing palladium-catalyzed reactions with appropriate silicon-based species and a silver additive. The researchers found that the choice of silane species and reaction conditions were crucial for a successful hydrosilylation/C-C bond-formation process. They used a variety of chemicals in their process, including 2-pyridyldimethylsilane, allyl- and benzyldimethylsilane, and 1,1,1,3,5,5,5-heptamethyltrisiloxane, among others. The conclusions of the research indicated that under carefully controlled conditions and with the appropriate silicon species, alkene products could be obtained in good yields and with high geometrical integrity, making this transformation valuable for synthetic chemists.

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