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What is the main use of 1-Bromo-4- (Perfluoroethoxy) Benzene?
1-Bromo-4- (perfluoroethoxy) benzene, this substance is widely used. In the field of organic synthesis, it is often used as a key intermediate. Due to the bromine atom and perfluoroethoxy group in its structure, it has unique reactivity. Bromine atoms are highly active and can borrow nucleophilic substitution reactions. They interact with many nucleophilic reagents, such as alcohols and amines, to achieve the construction of carbon-oxygen bonds and carbon-nitrogen bonds, and then synthesize organic compounds with diverse structures.
In the field of materials science, 1-bromo-4- (perfluoroethoxy) benzene also plays an important role. The strong electron absorption and excellent chemical stability of perfluoroethoxy can endow materials with unique properties. For example, introducing it into polymer materials can improve the surface properties of materials, such as reducing surface energy and enhancing the water resistance, oil resistance and antifouling properties of materials.
In addition, in the field of medicinal chemistry, it may be used to create new drugs. By ingeniously modifying its structure, compounds with specific biological activities may be obtained. Drug developers can use the reactivity of this substance to construct pharmacophore combined with biological targets to achieve the purpose of treating diseases.
Furthermore, in the field of electronic chemicals, 1-bromo-4- (perfluoroethoxy) benzene also shows potential application value. With the continuous development of electronic equipment in the direction of miniaturization and high performance, the performance requirements of electronic chemicals are increasing. Its unique chemical structure may bring special electrical properties and thermal stability to electronic chemicals, and play a key role in the preparation of electronic materials.
What are the physical properties of 1-Bromo-4- (Perfluoroethoxy) Benzene?
1-Bromo-4- (perfluoroethoxy) benzene is one of the organic compounds. Its physical properties are very important, and it is related to the application of this compound in many fields.
First of all, its appearance, under normal temperature and pressure, 1-bromo-4- (perfluoroethoxy) benzene is often colorless to light yellow liquid, clear and transparent, without visible impurities, and it has a flowing state. It is like smart water, but it has the characteristics of chemical substances.
Besides its melting point, it has been determined by many experiments that the melting point of this compound is about -20 ° C. At this temperature, 1-bromo-4- (perfluoroethoxy) benzene gradually changes from liquid to solid. The movement of the molecules slows down due to the decrease in temperature, and the arrangement between them tends to be regular and orderly.
The boiling point is also one of the key physical properties. The boiling point of 1-bromo-4- (perfluoroethoxy) benzene is about 170-180 ° C. When the temperature rises to the boiling point, the compound molecule gains a lot of energy and moves more violently, enough to break free from the shackles of the liquid phase and escape into a gaseous state.
In terms of density, its density is about 1.7-1.8 g/cm ³, compared with the density of water 1 g/cm ³, 1-bromo-4 - (perfluoroethoxy) benzene has a higher density. If mixed with water, it will sink to the bottom of the water, and the layers of the two are clearly distinguishable.
Solubility cannot be ignored either. 1-bromo-4 - (perfluoroethoxy) benzene is insoluble in water, because water is a polar molecule, and the polarity of this compound is weak. According to the principle of "similarity and compatibility", the two are difficult to miscible. However, it is soluble in common organic solvents, such as ether, chloroform, dichloromethane, etc. In such solvents, 1-bromo-4- (perfluoroethoxy) benzene molecules interact with solvent molecules and disperse uniformly.
In addition, 1-bromo-4- (perfluoroethoxy) benzene has a certain volatility. At room temperature, some molecules will escape from the liquid surface into the air, emitting a special odor. However, the odor is not strong and pungent, but its potential impact on the environment and human body cannot be ignored.
Is 1-Bromo-4- (Perfluoroethoxy) Benzene Chemically Stable?
The stability of the chemical properties of 1-bromo-4- (perfluoroethoxy) benzene is related to many reasons. In this compound, the bromine atom has a certain activity and can be involved in reactions such as nucleophilic substitution. However, its benzene ring has a certain stability due to the conjugation system. And in the perfluoroethoxy part, the fluorine atom is extremely electronegative, forming a strong electron-absorbing effect, which changes the distribution of molecular electron clouds.
Generally speaking, under common mild conditions, 1-bromo-4- (perfluoroethoxy) benzene is relatively stable. In air, without special conditions, it is not easy to react quickly with oxygen, water vapor, etc. In case of strong nucleophilic reagents, bromine atoms may be replaced, because the attack of nucleophilic reagents on bromine atoms can cause reactions to occur.
And in case of extreme conditions such as high temperature and strong radiation, its chemical bonds may be affected and broken, rearranged and other changes. However, in the conventional environment of general laboratory and industrial production, if there is no specific reagent and condition excitation, this compound can maintain a relatively stable state. However, the specific stability still needs to be fully considered according to the actual environment, contact substances and external conditions.
What is the preparation method of 1-Bromo-4- (Perfluoroethoxy) Benzene?
The preparation method of 1-bromo-4- (perfluoroethoxy) benzene, although the book "Tiangong Kaiwu" does not directly record the preparation method of this specific compound, it can be deduced according to the chemical process ideas and common synthesis concepts contained in it.
To prepare 1-bromo-4- (perfluoroethoxy) benzene, p-bromophenol and perfluorobromoethane can be used as raw materials. Both of these are common materials for organic synthesis. First, in an alkaline environment, the phenolic hydroxyl group of p-bromophenol is prone to lose protons and form phenoxy negative ions, which have strong nucleophilic properties. In perfluorobromoethane, because the bromine atom is connected to the perfluoroalkyl group, the polarity of the carbon-bromo bond is enhanced by the strong electron-absorbing effect of the fluorine atom, so that the carbon atom is partially positively charged and electrophilic. The phenoxy negative ion then attacks the carbon atom of perfluorobromoethane, and the bromine ion leaves, and the nucleophilic substitution reaction generates 1-bromo-4- (perfluoroethoxy) benzene.
When reacting, it is crucial to choose a suitable solvent. Aprotic polar solvents such as N, N-dimethylformamide (DMF) or dimethylsulfoxide (DMSO) are preferred, because they are soluble reactants and stabilize ionic intermediates, which promote The alkaline reagent can be selected from weak bases such as potassium carbonate and sodium carbonate to ensure that the phenolic hydroxyl group is effectively converted into phenoxy anions without unduly affecting the reaction system. At the same time, when temperature control and control are required, moderate heating can increase the reaction rate, but if the temperature is too high, side reactions or raw, so it is often reacted at 50-80 ° C for several hours. The reaction process is monitored by thin layer chromatography (TLC). When the raw material spots disappear, the reaction is completed. After the reaction is completed, pure 1-bromo-4- (perfluoroethoxy) benzene can be obtained through post-treatment processes such as extraction, washing, drying, and distillation.
What are the precautions for storing and transporting 1-Bromo-4- (Perfluoroethoxy) Benzene?
1-Bromo-4- (perfluoroethoxy) benzene is an organic compound. When storing and transporting it, the following matters must be paid attention to:
First, the storage environment should be strictly controlled. It should be placed in a cool, dry and well-ventilated place. This compound can easily decompose when heated, or even cause dangerous conditions, so it must be kept away from fire and heat sources, and the warehouse temperature should not be higher than 30 ° C. At the same time, the air humidity is also the key. If the humidity is too high or the compound deteriorates, the relative humidity should be maintained at 40% - 70%.
Second, the packaging must be solid and reliable. The packaging material used must be able to effectively resist the erosion of 1-bromo-4- (perfluoroethoxy) benzene, such as the use of special corrosion-resistant plastic drums or iron drums lined with special coatings. The packaging seal must be tight to prevent leakage. And the name of the chemical, dangerous characteristics, emergency treatment methods and other key information should be clearly marked on the outside of the package.
Third, the transportation process should be extra cautious. The transportation vehicle must have good ventilation equipment to disperse volatile gases that may leak. This compound is a hazardous chemical, and the transportation personnel should be professionally trained to be familiar with its characteristics and emergency treatment methods. Avoid severe bumps and collisions during transportation to prevent package damage. At the same time, necessary emergency rescue equipment and protective gear must be equipped in accordance with relevant regulations.
Fourth, do not mix with oxidizing substances, alkaline substances and other mixed storage and transportation. 1-Bromo-4 - (perfluoroethoxy) benzene encounters oxidizing substances or causes severe oxidation reactions; contact with alkaline substances may also cause chemical reactions, resulting in danger. Therefore, when storing and transporting, it is necessary to ensure that it is strictly isolated from such substances.