Dichlorodimethylsilane

Base Information

• Chemical Name: Dichlorodimethylsilane
• CAS No.: 75-78-5
• Molecular Formula: C2H6Cl2Si
• Molecular Weight: 129.061
• Hs Code.: 29310095
• European Community (EC) Number: 200-901-0
• ICSC Number: 0870
• NSC Number: 77070
• UN Number: 1162
• UNII: 8TSJ92JX69
• DSSTox Substance ID: DTXSID9026425
• Nikkaji Number: J1.467B
• Wikipedia: Dimethyldichlorosilane
• Wikidata: Q416690
• Mol file: 75-78-5.mol

Synonyms:dichlorodimethylsilane;dimethyldichlorosilane;DMDCS

Chemical Property of Dichlorodimethylsilane

Chemical Property:

• Appearance/Colour: Colorless to brown liquid
• Vapor Pressure: 143mmHg at 25°C
• Melting Point: -76 °C
• Refractive Index: n20/D 1.500
• Boiling Point: 69.999 °C at 760 mmHg
• Flash Point: -9 °C
• PSA: 0.00000
• Density: 1.075 g/cm³
• LogP: 2.16580
• Storage Temp.: Store at 0-5°C
• Sensitive.: Moisture Sensitive
• Solubility.: sol chlorinated solvents and ethereal solvents; reacts with protic solvents.
• Water Solubility.: reacts
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 127.9615821
• Heavy Atom Count: 5
• Complexity: 30.6
• Transport DOT Label: Flammable Liquid Corrosive

Purity/Quality:

99% ^*data from raw suppliers

Dichlorodimethylsilicon ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xn, Xi, F, N
• Hazard Codes: Xn,Xi,F,N,C
• Statements: 20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53-37-35-20/22-14-34
• Safety Statements: 60-61-62-36/37-59-45-36/37/39-26-16-7/9-2

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Toxic Gases & Vapors -> Chlorosilanes
• Canonical SMILES: C[Si](C)(Cl)Cl
• Inhalation Risk: No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20 °C.
• Effects of Short Term Exposure: The substance and the vapour are corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation may cause lung oedema. Exposure could cause death. Medical observation is indicated.
• Description: Dichlorodimethylsilane is a tetrahedral, organosilicon compound with the molecular formula Si(CH3)2Cl2. The compound is a colorless liquid at room temperature, has a pungent odor and readily reacts with water to form both cyclic and linear Si-O chains. On an industrial scale, dichlorodimethylsilane is manufactured as the main precursor to polysilane and dimethylsilicone compounds.
• Physical properties: mp ?76°C; bp 70–71°C; d 1.064 g cm?3.
• Uses: Dichlorodimethylsilane is used to prepare a resin bound siloxane with tertiary alcohols and it is also used as a reagent for synthesis of optically active ansa-mettallocene polymerization catalysts. It acts as a precursor to silicone and polysilane compounds. It is also used in the glass coating to protect it from micro particles. It is involved in the preparation of resin bound siloxane with reactivity towards tertiary alcohols. Dichlorodimethylsilane can be used as additive for pinacol cyclization; protecting group for diols and carbonyl compounds;precursor for a wide variety of siliconbased reagents.Dichlorodimethylsilane (1) allows clean pinacol cyclization of a keto aldehyde to occur without competition from an aldol reaction (eq 1). Dichlorodimethylsilicon is a organosilicon compound and is the precursor to dimethylsilicone and polysilane compounds.

Technology Process of Dichlorodimethylsilane

There total 209 articles about Dichlorodimethylsilane 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: 86.5%

silicon (7440-21-3) → Methyltrichlorosilane (75-79-6) + tetrachlorosilane (10026-04-7,53609-55-5) + trichlorosilane (10025-78-2) + dimethylsilicon dichloride (75-78-5,30107-43-8)

Guidance literature:

With methylene chloride; copper; In neat (no solvent); mixt. of CH3Cl/N2 (2:5) and Si-Cu (9:1) at 300°C;;

Reference yield:

bis(dimethylamino)dimethylsilane (3768-58-9) → 1,1,1-trichloro-N,N-dimethylsilanamine (13307-04-5) + bis(N,N-dimethylamino)dichlorosilane (13328-30-8) + (N,N-dimethylamino)dimethylchlorosilane (18209-60-4) + dimethylsilicon dichloride (75-78-5,30107-43-8)

Guidance literature:

With tetrachlorosilane; In benzene; Product distribution; halide-NMe₂ exchange reactions were investigated; neat; other reaction partner;

DOI:10.1039/DT9810001264

Reference yield:

aluminium trichloride (7446-70-0) + Methyltrichlorosilane (75-79-6) → tetrachlorosilane (10026-04-7,53609-55-5) + dimethylsilicon dichloride (75-78-5,30107-43-8)

Guidance literature:

at 375 - 450 ℃; under 47072.5 - 73550.8 Torr;

DOI:10.1021/ja01192a071

upstream raw materials:

chloro-trimethyl-silane

Methyltrichlorosilane

methylene chloride

(dichloromethyl)trimethylsilane

Downstream raw materials:

2,2,4,4,5,5-hexamethyl-1,3-dioxa-2-silacyclopentane

me2SiCl(Oph-4-Cl)

chlorodimethyl-2-thienylsilane

bis(diethylamino)dimethylsilane

Refernces

• 1、 Naganawa, Yuki,Nakajima, Yumiko,Sakamoto, Kei. "A General and Selective Synthesis of Methylmonochlorosilanes from Di-, Tri-, and Tetrachlorosilanes". supporting information. p. 601 - 606. Retrieved 2021/01/13.
• 2、 Santowski, Tobias,Sturm, Alexander G.,Lewis, Kenrick M.,Felder, Thorsten,Holthausen, Max C.,Auner, Norbert. "Synthesis of Functional Monosilanes by Disilane Cleavage with Phosphonium Chlorides". supporting information. p. 3809 - 3815. Retrieved 2019/02/13.