353-66-2

Usage

Uses

Used in the Semiconductor Industry:
Dimethyldifluorosilane is utilized as a precursor for the chemical vapor deposition (CVD) of silicon dioxide and silicon nitride thin films. These films are essential in the semiconductor industry for creating insulating and protective layers in microelectronic devices, enhancing their performance and reliability.
Used in the Production of Silicone Polymers:
DIMETHYLDIFLUOROSILANE serves as a key ingredient in the synthesis of silicone polymers, which are versatile materials with a wide range of applications, including sealants, adhesives, and coatings. The polymers exhibit unique properties such as heat resistance, chemical stability, and non-stick characteristics, making them valuable in various industries.
Used as a Reagent in Organic Synthesis:
Dimethyldifluorosilane is employed as a reagent in organic synthesis, facilitating specific chemical reactions and transformations. Its reactivity allows for the formation of new compounds and materials with tailored properties for specialized applications.
Safety Considerations:
Due to its high reactivity, flammability, and potential to form toxic byproducts when reacting with air or water, Dimethyldifluorosilane should be handled with extreme caution. Proper safety measures and equipment are necessary to mitigate risks associated with its use in various applications.

InChI:InChI=1/C2H6F2Si/c1-5(2,3)4/h1-2H3

Upstream product

• 556-67-2 octamethylcyclotetrasiloxane 
• 541-02-6 decamethylcyclopentasiloxane 
• 75-78-5 dimethylsilicon dichloride 
• 151237-89-7 dimethylfluorosilyl azide 
• 2295-12-7 1,1-dimethylsilacyclobutane 
• 341-02-6 trityl tetrafluoroborate 
• 1627-98-1 1,1,3,3-tetramethyl-1,3-disiletane 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 
• 1956-79-2 (chloromethyl)trifluorosilane 
• 7274-82-0 chloromethyl methyl difluorosilane 
• 328-57-4 methyldifluorophenylsilane 
• 368-47-8 phenyltrifluorosilane 
• 1112-39-6 dimethyldimethoxysilan 
• 661-68-7 1,2-difluoro-1,1,2,2-tetramethyl-disilane 

Downstream Products

• 67142-02-3 C₁₆H₃₆BFN₄Si₄ 
• 65768-31-2 N-(Fluordimethylsilyl)-2,4-6-trimethylanilin 
• 70557-59-4 C₁₆H₂₂F₂N₂Si₂ 
• 83312-36-1 1-(Fluoro-dimethyl-silanyl)-2,2,4,4-tetraisopropyl-[1,3,2,4]diazadisiletidine 
• 83312-37-2 1,3-Bis-(fluoro-dimethyl-silanyl)-2,2,4,4-tetraisopropyl-[1,3,2,4]diazadisiletidine 
• 420-56-4 trimethylsilyl fluoride 
• 1112-39-6 dimethyldimethoxysilan 
• 3768-58-9 bis(dimethylamino)dimethylsilane 
• 373-74-0 methyltrifluorosilane 
• 52686-74-5 methoxydimethylfluorosilane 
• 271772-12-4 methylfluorodimethoxysilane 
• 271772-13-5 methyldifluoromethoxysilane 
• 1570054-11-3 [bis(triphenyl-λ⁵-phosphanylidene)ammonium][Me2SiF3] 
• 1639345-42-8 3-cyanopropyldimethylfluorosilane 

Relevant academic research and scientific papers

Synthesis of alkyl fluorosilanes by the reaction of alkyl chlorosilanes with pyridinium poly(hydrogen fluoride) at room temperature

Dimethyl difluorosilane (DFS) has been prepared in high yield (80-90percent) by the reaction of dimethyl dichloro-silane with pyridinium poly(hydrogen fluoride) at room temperature (25-35 deg C).The gas has been characterised by IR and 19F NMR spectroscopy, molecular weight measurements and elemental analysis.The method has been extended to the preparation in high yields of monomethyl and trimethyl fluorosilanes.

Depolymerization of end-of-life poly(dimethylsilazane) with boron trifluoride diethyl etherate to produce difluorodimethylsilane as useful commodity

A straightforward protocol for the depolymerization of end-of-life poly(dimethylsilazane) using boron trifluoride diethyl etherate as depolymerization reagent to convert the Si-N to Si-F bonds was set-up. The application of the depolymerization reagent affords difluorodimethylsilane as major products, which can be a suitable synthon for the synthesis of new polymers (e.g., poly(dimethylsiloxanes) and allow an overall recycling of the [Me2Si]-unit.

Synthetic method of lithium battery aid 3-cyanopropyldimethylfluorosilane

The invention relates to the technical field of synthesis of organosilicon compounds, in particular to a synthetic method of a lithium battery aid 3-cyanopropyldimethylfluorosilane. The synthetic method comprises dropwise adding 4-chlorobutytonitrile into a sodium water-free solvent, allowing to react to obtain a suspension of N=CCH2CH2CH2Na, and carrying out any one of two process routes to obtain 3-cyanopropyldimethylfluorosilane, wherein the route 1 includes subjecting N=CCH2CH2CH2Na to reaction with dimethyldichlorosilane to obtain 3-cyanopropyldimethylchlorosilane, and fluorinating to obtain 3-cyanopropyldimethylfluorosilane, and the route 2 includes fluorinating dimethyldichlorosilane to obtain dimethyldifluorosilane, and subjecting the dimethyldifluorosilane to reaction with N=CCH2CH2CH2Na to obtain the 3-cyanopropyldimethylfluorosilane. The synthetic method has the advantages that the raw materials are easy to attain, the cost is low, the purity is higher, reacting is easy, andthe synthetic method is economical and feasible.

NONAQUEOUS ELECTROLYTE COMPOSITIONS COMPRISING SILYL OXALATES

Disclosed herein are electrolyte compositions comprising a fluorinated solvent, at least one silyl oxalate represented by the formulas RR′Si(C2O4), wherein R and R′ are each the same or different from each other and independently selected from C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, or C6-C10 aryl radical, optionally comprising at least one substituent selected from halogen, hydroxyl, alkoxy, carbonyl, and carboxyl groups; and LiPF6. Also disclosed herein are electrolyte compositions comprising a fluorinated solvent and a lithium oxalato phosphate salt represented by the formula LiPF(6-2q)(C2O4)q, wherein q is 1, 2 or 3; wherein the oxalato phosphate salt comprises at least a portion that is derived from at least one silyl oxalate as defined herein. The electrolyte compositions are useful in electrochemical cells, such as lithium ion batteries.

Synthesis and kinetics of disassembly for silyl-containing ethoxycarbonyls using fluoride ions

In this study, a series of silyl-containing ethoxycarbonates and ethoxycarbamates on electron poor anilines and phenols were synthesized and their kinetics of disassembly determined in real-time upon exposure to fluoride ion sources at room temperature. The results provide a greater understanding of stability and kinetics for silyl-containing protecting groups that eliminate volatile molecules upon removal, which will allow for simplification of orthogonal protection in complex organic molecules.

Effect of Silyl Ether-functinoalized Dimethoxydimethylsilane on Electrochemical Performance of a Ni-rich NCM Cathode

Dimethoxydimethylsilane (DODSi) is used as an interface stabilizing additive through a selective HF scavenging reaction for layered Ni-rich oxide cathodes. Ex situ NMR analyses demonstrated that DODSi effectively removes HF from the electrolyte based on the matched chemical reactivity of Si with F? and O with H+. The cells employing DODSi exhibit higher specific capacity with retention than those cycled with a DODSi-free electrolyte even under in situ HF generating conditions. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-mass spectroscopy (ICP-MS) analyses indicate that DODSi effectively protects the Ni-rich oxide cathodes against HF corrosion, resulting in improved surface stability of Ni-rich cathodes.

Thermal and hydrolytic decomposition mechanisms of organosilicon electrolytes with enhanced thermal stability for lithium-ion batteries

The high flammability and thermal instability of conventional carbonate electrolytes limit the safety and performance of lithiumion batteries (LIBs) and other electrochemical energy storage devices. Organosilicon solvents have shown promise due to their reduced flammability and greater chemical stability at high temperatures. A series of organosilicon electrolytes with different functional substituents were studied to understand the structural origins of this enhanced stability. The thermal and hydrolytic stability of organosilicon and carbonate solvents with LiPF6 was probed by storage at high temperatures and with added water. Quantitative monitoring of organosilicon and carbonate electrolyte decomposition products over time using NMR spectroscopy revealed mechanisms of degradation and led to the discovery of a key PF5-complex that forms in organosilicon electrolytes to inhibit further salt breakdown. Increased knowledge of specific structural contributions to electrolyte stability informs the development of future electrolyte solvents to enable the safer operation of high-performing lithium-ion batteries.

Transformations of diallylsilanes under the action of electrophilic reagents

Reactions of dimethyl-, diphenyl-, and (chloromethyl)methyldiallylsilanes with acetic, trifluoroacetic, triflic acids and complex BF3 · 2AcO{cyrillic}H are studied. Depending on the structure of the starting diallylsilane and the nature of the

Si-disubstituted diallylsilanes in homolytic thiylation and electrophilic fragmentation reactions

Approaches to Si-disubstituted 1-thia-5-silacyclooctanes based on homolytic addition of hydrogen sulfide to diallylsilanes R2Si(CH 2CH=CH2)2 and on intramolecular cyclization of Si-disubstituted (allyl)(γ-sulfanylpropyl)silanes have been studied. In the former case the reactivity of the silanes decreases in the order R = MeO > F > Me > Ph, whereas in the latter case the reactivity order is slightly different: Me > MeO ≈ F ? Ph. The reactions of diphenyl-and dimethyldiallylsilanes with the complex BF3?2AcOH occur in a different manner: The former involves rearrangement to form fluoro(2-methylpent- 4-enyl)diphenylsilane, while the latter, elimination of the two allyl groups to fluorodimethylsilane and propene.

Synthesis and applications of tert-alkoxysiloxane linkers in solid-phase chemistry

Straightforward syntheses of two tert-alkoxysilyl chloride functionalised resins 3 and 31 that allow facile attachment of 1°, 2°, 3° alcohols and phenols to the solid-phase have been achieved. Resin 3 displayed useful loading levels (0.7 mmol/g), and it was stable to storage in activated form. Siloxanes from reaction of 3 with alcohols and phenols were compatible with a variety of reaction conditions commonly used in solid-phase synthesis.