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What are the main uses of 2-Chlorobenzotrifluoride?
2-Chlorotrifluorotoluene is also an organic compound. It has a wide range of uses and is involved in all fields of chemical industry.
First, it is often an important raw material in the synthesis of medicine. It can be combined with other compounds through many chemical reactions to produce various drugs. Due to its special chemical structure, it can endow the prepared drugs with specific pharmacological activities and properties, such as enhancing the stability of the drug and improving its bioavailability, which contributes to the creation of medicine.
Second, it is also indispensable in the field of pesticides. Based on this, many efficient pesticide products can be developed. Due to its specific chemical properties, it can show good inhibition or killing effect on pests, bacteria and other harmful organisms, and has relatively little impact on the environment, so it is very popular in modern agricultural pest control.
Third, in the field of materials science, it also has its place. It can be used as a monomer or auxiliary for the synthesis of special polymer materials. By means of polymerization reaction, it is integrated into the polymer skeleton, thereby giving the material unique properties, such as chemical corrosion resistance, heat resistance, etc., and is widely used in the preparation of high-end materials such as aerospace and electronics.
Fourth, in the dye industry, 2-chlorotrifluorotoluene can also play a role. It can be used as a key intermediate in the synthesis of new dyes. With its structural characteristics, it endows dyes with unique color, light resistance and dyeing properties, making them better used in textile, printing and dyeing industries.
What are the physical properties of 2-Chlorobenzotrifluoride?
2-Chlorotrifluorotoluene, its physical state is a colorless and transparent liquid at room temperature. Looking at it, it is clear and free of impurities, like clear water in a mirror, which is clear and clear.
Its smell is specific, pungent, and the smell is uncomfortable. It is like a spicy smell that goes straight into the nose, warning that this thing is extraordinary.
On its boiling point, it is about 152-153 ° C. When placed above a heat source, the temperature gradually rises, and at this time it liquefies into gas and rises. Its melting point is very low, about -48 ° C. At lower temperatures, it can still maintain its liquid shape, as if it is not afraid of cold.
In terms of density, it is about 1.388g/mL (20 ° C), which is heavier than water. If it is mixed with water, it will sink underwater, just like a stone falling into water and sinking directly.
In terms of solubility, this substance is difficult to dissolve in water. The two are like water and fire, and they repel each other. However, in organic solvents, such as ethanol, ether, etc., they can dissolve each other, like old friends meeting, and they are in harmony.
Its vapor pressure exists under certain conditions, which is related to its behavior in the gas phase. In a confined space, steam molecules are active, forming a certain pressure, which affects its storage and use. The physical properties of 2-chlorotrifluorotoluene are of great significance in many fields such as chemical industry and medicine, and are crucial to the progress of the reaction and the quality of the product.
What is the chemistry of 2-Chlorobenzotrifluoride?
2-Chlorotrifluorotoluene is one of the organic compounds. It is active and has unique physical and chemical properties.
Looking at its physical properties, 2-chlorotrifluorotoluene is a colorless to light yellow transparent liquid at room temperature, with a pungent odor. Its boiling point is about 152-153 ° C, its density is higher than that of water, and it is insoluble in water, but it can be miscible with many organic solvents such as ethanol, ether, acetone, etc.
In terms of its chemical properties, 2-chlorotrifluorotoluene has high chlorine atom activity. Due to the influence of the benzene ring and the trifluoromethyl group, the density of the C-Cl bond electron cloud where the chlorine atom is located changes, making it vulnerable to nucleophilic attack, and then nucleophilic substitution reaction occurs. For example, under alkaline conditions, the hydroxyl negative ion can replace the chlorine atom to generate 2-hydroxytrifluorotoluene.
Furthermore, the hydrogen atom on the benzene ring also has a certain reactivity. Due to the strong electron-absorbing effect of trifluoromethyl, the electron cloud density of the benzene ring decreases, especially the electron cloud density of the ortho and para-site decreases even more. Therefore, in the electrophilic substitution reaction, 2-chlorotrifluorotoluene mainly reacts in the meso-site. For example, in the presence of a specific catalyst, it can nitrate with mixed acids of nitric acid and sulfuric acid to form meta-nitro substitution products.
In addition, 2-chlorotrifluorotoluene can also participate in other reactions such as reduction reactions. Under the action of an appropriate reducing agent, the benzene ring can be partially reduced, or the chlorine atom can be reduced and removed to form the corresponding reduction product.
In summary, 2-chlorotrifluorotoluene has a wide range of chemical properties due to its special structure. It is widely used in the field of organic synthesis and can be used as a synthesis intermediate for fine chemicals such as pharmaceuticals, pesticides, and dyes.
What is the preparation method of 2-Chlorobenzotrifluoride?
2-Chlorotrifluorotoluene is also an organic compound, and the preparation method is as follows:
1. ** Method using o-chlorotoluene as raw material **:
-o-chlorotoluene is first chlorinated, and this step is assisted by light or catalyst. If under light conditions, chlorine gas is introduced to replace the hydrogen on the methyl group of o-chlorotoluene with chlorine to obtain o-chlorobenzyl chloride. The reaction is roughly:\ (C_7H_7Cl + Cl_2\ stackrel {light} {→} C_7H_6Cl_2 + HCl\).
- The obtained o-chlorobenzyl chloride is then reacted with anhydrous hydrogen fluoride under specific conditions. This reaction requires a catalyst, such as antimony pentachloride. After this step, the chlorine atom of benzyl chloride is replaced by the fluorine atom, and the final product is 2-chlorotrifluorotoluene. The reaction formula is about:\ (C_7H_6Cl_2 + 3HF\ stackrel {SbCl_5} {→} C_7H4ClF_3 + 2HCl\). The raw material of this route is easy to obtain, but the reaction steps are slightly complicated, and the chlorination and fluorination processes need to be controlled with precise conditions.
2. ** Method of using o-chlorobenzoic acid as raw material **:
-chlorobenzoic acid reacts with sulfoxide chloride first, and the carboxyl group is converted into acyl chloride to obtain o-chlorobenzoyl chloride. This reaction is easy and has few side reactions, and the approximate reaction is:\ (C_7H5ClO_2 + SOCl_2 → C_7H4ClClO + SO_2 + HCl\).
- o-chlorobenzoyl chloride reacts with fluorinated reagents such as hydrogen fluoride and sodium fluoride in suitable solvents to form o-chlorobenzoyl fluoride.
- Finally, o-chlorobenzoyl fluoride can be obtained by rearrangement, decarboxylation and other reaction steps. 2-chlorotrifluorotoluene can be obtained. Although there are many steps in this way, the reaction selectivity of each step is acceptable, and the raw materials are not rare.
3. ** Method of using 2-chloro-1- (trifluoromethyl) phenylboronic acid as raw material **:
- React with suitable metal catalysts, such as palladium catalysts, with 2-chloro-1- (trifluoromethyl) phenylboronic acid and halogenated hydrocarbons under basic conditions. This is a coupling reaction or the like. Through reasonable selection of reagents and conditions, the reaction can proceed in the direction of generating 2-chlorotrifluorotoluene. The reaction conditions of this method are relatively mild and the selectivity is quite high, but the catalyst is more expensive and the cost may increase.
What are the precautions in storage and transportation of 2-Chlorobenzotrifluoride?
2-Chlorotrifluorotoluene is an organic compound, and many matters need to be paid attention to during storage and transportation.
Primary storage environment. This substance should be stored in a cool and ventilated warehouse, away from fires and heat sources. Due to its flammability, high temperature environments are prone to danger. The warehouse temperature should be controlled between -18 ° C and 37 ° C to ensure its chemical stability.
Furthermore, ensure that the container is sealed when storing. 2-Chlorotrifluorotoluene should be stored separately from oxidizing agents and alkalis, or cause chemical reactions, resulting in quality changes. It should be stored separately from oxidizing agents and alkalis, and should not be mixed. Because of its encounter with oxidizing agents, or the risk of violent reactions; contact with alkalis, uncontrollable chemical reactions may also occur.
When transporting, it is necessary to ensure that the packaging is complete and the loading is secure. During transportation, the container should be prevented from leaking, collapsing, falling or damaged. The transportation vehicle should be equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment. During transportation, it should be protected from exposure to the sun, rain and high temperature. When transporting by road, follow the prescribed route and do not stop in residential areas and densely populated areas.
In short, the storage and transportation of 2-chlorotrifluorotoluene must be carried out in strict accordance with relevant safety procedures to ensure the safety of personnel and the environment, and avoid accidents caused by improper disposal.