Methyltrichloromethylsilane (CH3SiCl3) is an organosilicon compound monomer. This colorless liquid is essential to chemical synthesis, especially silicon-based polymers. Although it has a simple structure, chemists care most about its density, melting and boiling points, and molecular weight. It is flammable and releases poisonous gases, so handling it requires caution. Its water reaction and CAS number 75-79-6 are also important for safe and effective use. In this post, Dakenchem will talk about the methyltrichlorosilane CH3SiCl3.

Overview of Methyltrichlorosilane CH3SiCl3

Methyltrichlorosilane (CH3SiCl3) is an important organosilicon compound. The pungent odor of this colorless liquid at room temperature distinguishes it. Methyltrichlorosilane has one methyl group (CH3) and three chlorine atoms (Cl3) attached to a silicon atom, hence its name.

However, Trichloromethylsilane is another synonym for Methyltrichlorosilane. The two names describe the same chemical entity and are used interchangeably in science. Terminology differs mostly in name language. Trichloromethylsilane emphasizes the trichloro component, while Methyltrichlorosilane emphasizes the methyl group. Although the names differ, both terms refer to the same organosilicon compound, confirming their relationship.


Methyltrichlorosilane Structure

Methyltrichloro silane, with the chemical formula CH3SiCl3, has a unique structure. In the center of this compound is a silicon atom with a methyl group (CH3) and three chlorine atoms (Cl3). This creates a tetrahedral molecular geometry common in organosilicon compounds.

The structure of methyltrichlorosilane is closely related to its function in organosilicon compounds. The methyl group and three chlorine atoms on silicon give it unique chemical properties. As a monomer, it builds complex silicon-based polymers. Its unique atom arrangement allows it to react differently with different compounds, making it a versatile chemical synthesis tool. The unique structure of methyltrichlorosilane makes it useful in organosilicon chemistry.

Methyltrichlorosilane Chemistry

In its chemical formula, CH3SiCl3, methyltrichlorosilane has many intriguing properties. This is an organosilicon compound. The name’methyl’ indicates a methyl group (CH3), and ‘trichlorosilane’ indicates three chlorine atoms and a silicon atom.

Structure controls Methyltrichlorosilane’s chemical properties. Single bond between methyl group carbon and silicon atom. The silicon atom bonds with three chlorine atoms simultaneously. This structure gives the compound unique reactivity. It vigorously reacts with water to form hydrochloric acid and methylsilanol. Exothermic reactions release a lot of energy.

Pyrolysis makes methyltrichlorosilane a good source of high-purity silicon. It decomposes into silicon, methyl chloride, and hydrogen chloride when heated. Its semiconductor industry value comes from this property.

A colorless liquid, methyltrichlorosilane. Its structure lacks chromophore groups, explaining this. A molecule’s chromophores determine its color. Methyltrichlorosilane is colorless without these groups. Like most chlorinated compounds, it smells strong and pungent.

Chemical Synthesis of Methyltrichlorosilane

Methyltrichlorosilane (CH3SiCl3) is essential to chemical synthesis. This organosilicon compound is used as a reagent in chemical reactions to synthesize many other compounds. It forms organosilicon derivatives through substitution reactions due to its three reactive chlorine atoms.
Furthermore, methyltrichlorosilane is an effective monomer that forms the basis of polymers. It bonds with other monomers to form larger molecular structures due to its unique structure, which has a central silicon atom connected to a methyl group and three chlorine atoms. These polymers have different properties and are used in electronics, coatings, and sealants. In chemical synthesis, methyltrichlorosilane is a versatile reagent and a polymer core building block.

Methyltrichlorosilane Physical Properties

Methyltrichlorosilane (CH3SiCl3) has many intriguing properties. These properties affect its handling and industrial applications.

Density is important for Methyltrichlorosilane. Substance density is mass per unit volume. At 1.26 grams per cubic centimeter, methyltrichlorosilane has a high density. Methyltrichlorosilane is heavier than water because its density is higher.

The melting and boiling points of methyltrichlorosilane are also noteworthy. At its melting point, a substance becomes liquid. This happens at -54 degrees Celsius for methyltrichlorosilane. However, the boiling point—66 degrees Celsius—is much higher. These values show that Methyltrichlorosilane remains liquid at many temperatures, which is good for storage and transport.

Finally, Methyltrichlorosilane’s molecular weight affects its physical and chemical properties. Adding the atomic weights of all the atoms in a compound molecule yields its molecular weight. Taking into account the atomic weights of carbon, hydrogen, silicon, and chlorine, methyltrichlorosilane has a molecular weight of 149.5 grams per mole.

Methyltrichlorosilane’s density, melting and boiling points, and molecular weight affect its use and handling in industrial applications.

VII. Methyltrichlorosilane (CH3SiCl3) Risks

While useful in many industrial applications, methyltrichlorosilane (CH3SiCl3) poses several hazards that require careful handling and storage.

The flammability of methyltrichlorosilane is a major issue. This reactive compound ignites easily when exposed to air or moisture. Chlorine atoms make the molecule volatile. Therefore, store it in a cool, dry place away from ignition sources.

Second, methyltrichlorosilane can release toxic gases when it reacts with water. Inhaling hydrochloric acid gas from such a reaction is harmful. This gas can kill in high concentrations and cause severe respiratory problems. Thus, using this chemical in well-ventilated areas and taking precautions is essential.

Lastly, Methyltrichlorosilane can cause eye irritation and skin damage. Contact with this corrosive compound can cause burns and other injuries. Handling this substance requires gloves and safety goggles. If accidentally exposed, wash immediately with plenty of water.

VIII. Water Reaction with Methyltrichlorosilane

Methyltrichlorosilane (CH3SiCl3) reacts exothermically with water. This reaction forms methylsilanol (CH3Si(OH)3) and hydrochloric acid by replacing chlorine atoms with hydroxyl groups. The chemical equation for this reaction is:
CH3SiCl3 + 3H2O → 3Si(OH)3 + 3HCl

This vigorous reaction generates a lot of heat. Additionally, hydrochloric acid gas release is dangerous.

Given the intensity and potential risks of this reaction, several precautions must be taken during execution. First, the reaction should be done in a well-ventilated area or under a fume hood to safely disperse hydrochloric acid gas. Second, wear gloves, lab coats, and safety glasses to avoid splashes and fumes.

Because the reaction is exothermic, Methyltrichlorosilane must be added to water slowly and carefully to control heat and avoid violent reactions. Finally, a neutralizing agent should be available to clean up spills and neutralize acid.

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