18187-24-1

Basic information

• Product Name: TETRAMETHYL-1,3-DIMETHOXYDISILOXANE
• Synonyms: TETRAMETHYL-1,3-DIMETHOXYDISILOXANE;1,3-Dimethoxy-1,1,3,3-Tetramethyldisiloxane;Disiloxane, 1,3-dimethoxy-1,1,3,3-tetramethyl-;methoxy-[methoxy(dimethyl)silyl]oxy-dimethylsilane
• CAS NO: 18187-24-1
• Molecular Formula: C₆H₁₈O₃Si₂
• Molecular Weight: 194.38
• Mol File: 18187-24-1.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 139°C
• Flash Point: 28.5 °C
• Appearance: /
• Density: 0.905
• Vapor Pressure: 8.16mmHg at 25°C
• Refractive Index: 1.3835
• CAS DataBase Reference: TETRAMETHYL-1,3-DIMETHOXYDISILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: TETRAMETHYL-1,3-DIMETHOXYDISILOXANE(18187-24-1)
• EPA Substance Registry System: TETRAMETHYL-1,3-DIMETHOXYDISILOXANE(18187-24-1)

Safety Data

• Hazardous Substances Data: 18187-24-1(Hazardous Substances Data)

Usage

General Description

Tetramethyl-1,3-dimethoxydisiloxane is a type of organosilicon compound that is commonly used as a reagent in organic synthesis. It is a colorless, odorless liquid that is soluble in organic solvents. This chemical is used as a crosslinking agent in silicone elastomers and as a precursor in the production of silicone resins. It is also used in the manufacturing of adhesives, sealants, and coatings, as well as in the production of silicone rubbers and plastics. Tetramethyl-1,3-dimethoxydisiloxane is considered to be relatively low in toxicity, but proper safety precautions should still be taken when handling and using this compound.

InChI:InChI=1/C6H18O3Si2/c1-7-10(3,4)9-11(5,6)8-2/h1-6H3

Upstream product

• 67-56-1 methanol 
• 2401-73-2 1,1,3,3-tetramethyl-1,3-dichlorodisiloxane 
• 1112-39-6 dimethyldimethoxysilan 
• 67078-75-5 2,2-dimethyl-1-oxa-2-silacyclohexa-3,5-diene 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 
• 1067-52-3 tributyltin methoxide 
• 88703-87-1 1,2-silaoxetene 2,2-dimethyl-3-(trimethylsilyl)-4-adamantyl-1-oxa-2-silacyclobutene 
• 84521-19-7 (1R,7S)-9,9-Dimethyl-4,8-dioxa-9-sila-tricyclo[5.2.2.0^2,6]undec-10-ene-3,5-dione 
• 55606-82-1 t-Butyl(methoxydimethylsilyl)peroxid 
• 692-50-2 hexafluoro-2-butyne 
• 98-95-3 nitrobenzene 
• 109756-02-7 1-methoxy-2-phenyl-1,1,3,3-tetramethyl-3-(methoxydimethyl)siloxydisilazane 
• 135251-53-5 N,N'-diphenyl-1,1,3,3,5,5,7,7-octamethyl-1,3,5,7-tetrasila-2,6-diaza-4,8-dioxacyclooctane 
• 75-78-5 dimethylsilicon dichloride 

Relevant articles and documents

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METHOD FOR PRODUCING HYDROCARBON OXYSILICON COMPOUNDS

The invention relates to a method for producing silicon compounds (A) having hydrocarbon oxy-groups that have at least one unit of the general formula (1) HmSi (OR)n (OR′) oR″pX4-m-n-o-p (1) by conversion of silicon compounds (B) having at least one unit of the general formula (2) Hm+nSi(OR′)oR″pX4-m-n-o-p (2), having an alcohol of the general formula (3) ROH (3) in the presence of a catalyst (K) that is on a carrier material bonded metal selected from Ni, Pd, Pt, wherein per mol formed group OR, at maximum 1 liter of solvent is used and wherein R, R′, R″, X, m, n, o and p have the meanings listed in claim 1.

KINETICS OF THE ACID-CATALYSED SOLVOLYSIS OF SIX-MEMBERED CYCLOSILAZOXANES CONTAINING TWO SILAZANE BONDS

The solvolysis of N,N'-diphenyl-1,1,3,3,5,5-hexamethyl-1,3,5-trisila-2,4-diaza-6-oxacyclohexane (II) in methanol/water in the presence of an acetate buffer is a two-step, pseudo-first-order, process.Both steps are subject to general acid catalysis and their catalytic rate constants have been determined spectrophotometrically.The ring cleavage is faster than that of analogous cyclosilazoxanes containing a single silazane bond (I), but the catalytic mode, substituent effects, and the solvent isotope effect indicate a close mechanistic similarity for the solvolysis of I and II.