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What are the main uses of 1-Fluoro-2-Methyl-3-Nitrobenzene?
1-Fluoro-2-methyl-3-nitrobenzene is also an organic compound. Its main uses cover the following ends.
First, in the field of organic synthesis, it is an important intermediate. It can undergo many chemical reactions, such as nucleophilic substitution reaction, with its activity of fluorine atoms, interact with various nucleophilic reagents to introduce different functional groups to build complex organic molecules. Chemists can use this to synthesize compounds with special properties and functions, such as those required in the fields of medicine, pesticides, dyes, etc.
Second, in the field of pharmaceutical research and development, it may become a key structural unit of lead compounds. By modifying and modifying its chemical structure, it is expected to create new drugs, or have unique pharmacological activities, to deal with the challenges of specific diseases. Pharmaceutical researchers often use this to explore new therapeutic approaches and drug targets.
Third, in the process of materials science, it can participate in the synthesis of special materials. For example, through rational design and reaction, it can be integrated into the structure of polymer materials, giving the materials special properties, such as improving the heat resistance and chemical corrosion resistance of materials, and showing potential in the field of high-end material preparation.
Fourth, in the creation of pesticides, this is used as a starting material, and after chemical transformation, it may be able to synthesize pesticide varieties with high insecticidal, bactericidal or herbicidal activities, providing a powerful tool for agricultural pest control and helping to improve the stability and efficiency of agricultural production.
In short, 1-fluoro-2-methyl-3-nitrobenzene has important uses in many fields such as organic synthesis, medicine, materials, and pesticides, providing a key material basis and chemical means for the development of related industries.
What are the physical properties of 1-Fluoro-2-Methyl-3-Nitrobenzene?
1-Fluoro-2-methyl-3-nitrobenzene is an organic compound. It has various physical properties, as detailed below.
When it comes to appearance, 1-fluoro-2-methyl-3-nitrobenzene is often a light yellow to yellow liquid with clear color. It can be seen that its purity affects its color, or it is discolored due to impurities. Looking at its state, under normal temperature and pressure, it exists in a liquid state with good fluidity. It feels or has a slippery state. However, it involves chemicals and should not be easily touched.
The boiling point is the critical temperature at which a substance changes from liquid to gaseous state. The boiling point of 1-fluoro-2-methyl-3-nitrobenzene is about 240-242 ° C. At this temperature, the molecule is energized beyond the binding force, and then moves from the liquid phase to the gas phase. The boiling point value varies depending on the environmental pressure. If it is at a plateau low pressure, the boiling point may drop; at a high pressure, the boiling point may rise.
The melting point is related to the transformation of a substance from a solidified liquid state. The melting point of this compound is about -11 ° C, which means that if the temperature is higher than this value, the solidification will dissolve the liquid. The determination of the melting point helps to determine its purity. The melting point of pure ones is sharp, and the melting point of miscellaneous ones is wide and decreases.
Density is the mass of a unit volume of substance. The density of 1-fluoro-2-methyl-3-nitrobenzene is about 1.32 g/cm ³, which is heavier than water. If water is placed in a container, it will sink underwater. This property is crucial in experimental operations such as separation and mixing.
In terms of solubility, 1-fluoro-2-methyl-3-nitrobenzene is slightly soluble in water. Due to its hydrophobic properties, the combination of fluorine, methyl and nitro groups in the molecular structure makes it weakly interact with water. However, it is soluble in many organic solvents, such as ethanol, ether, chloroform, etc. Due to the principle of "similarity and compatibility", organic solvents and the compound have the same structure and polarity, and have strong interaction force and are miscible.
Volatile, 1-fluoro-2-methyl-3-nitrobenzene has a certain volatility at room temperature, its molecules tend to escape from the liquid phase, and its special smell can be smelled in the air. However, the volatilization rate is slower than that of common low-boiling point solvents. Its volatility is related to temperature, surface area, air circulation, etc. When the temperature is high, the surface area is large, and the air circulation speed, the volatilization rate increases.
The refractive index is also one of its physical characteristics, and the refractive index is about 1.552-1.554. This value is useful in the field of optics, purity analysis, etc. The refractive index of different substances varies, which can be used as evidence for material identification. When the purity changes, the refractive index also changes.
What is the chemistry of 1-Fluoro-2-Methyl-3-Nitrobenzene?
1-Fluoro-2-methyl-3-nitrobenzene is also an organic compound. Its molecular structure is unique, containing fluorine atoms, methyl groups and nitro groups on the benzene ring. These three give the compound specific chemical properties.
Fluorine atoms have strong electronegativity, which can change the electron cloud density distribution of the benzene ring. Due to the electron-withdrawing induction effect of fluorine, the electron cloud density of the benzene ring is reduced, so the electrophilic substitution reaction activity is weakened, and the reaction check point is also different from that of fluorine-free benzene derivatives. The existence of fluorine atoms also changes the polarity of the molecule, affecting its physical properties, such as boiling point and solubility. The electron cloud density of the benzene ring can be increased, especially the ortho and para-sites. However, when coexisting with fluorine atoms, the electronic effects of the two are mutually balanced. The presence of methyl also changes the molecular space structure and affects the intermolecular forces. The presence of nitro groups is a strong electron-absorbing group, which greatly reduces the electron cloud density of the benzene ring, making it extremely difficult to occur the electrophilic substitution reaction of the benzene ring. Nitro causes the electron cloud on the benzene ring to shift towards it, making the benzene ring more electron-deficient. At the same time, nitro is prone to reduction and can be reduced to other groups such as amino groups, which is an important reaction path in organic synthesis.
The chemical properties of 1-fluoro-2-methyl-3-nitrobenzene are influenced by the interaction of fluorine atom, methyl group and nitro group, and have important research value and application potential in organic synthesis, medicinal chemistry and other fields.
What are 1-Fluoro-2-Methyl-3-Nitrobenzene synthesis methods?
The synthesis method of 1-fluoro-2-methyl-3-nitrobenzene is described in the past books, and there are about several ends.
First, it can be started from o-methylaniline. First, the amino group is protected by acetyl group to obtain acetyl-o-methylaniline. Then through nitration reaction, because acetamide is an o-and para-site group, methyl is also an o-and para-site group. The two affect together to introduce nitro at a specific position to obtain 2-methyl-3-nitroacetylaniline. After hydrolysis, the acetyl group is removed to obtain 2-methyl-3-nitroaniline. Then through the diazotization reaction, sodium nitrite interacts with hydrochloric acid to form a diazonium salt. Finally, it reacts with fluoroboronic acid to form a diazonium salt of fluoroboronic acid, which is decomposed by heat to obtain 1-fluoro-2-methyl-3-nitrobenzene.
Second, use o-methyl fluorobenzene as raw material. Because of its fluorine atom as o-and para-site group, methyl is also o-and para-site group. Under nitrification conditions, by mixing nitric acid with sulfuric acid, nitro can be introduced into a specific position to directly generate 1-fluoro-2-methyl-3-nitrobenzene. However, this process requires fine control of the reaction conditions. Due to the intense nitrification reaction and the positioning group effect may cause side reactions, factors such as temperature and acid concentration need to be precisely controlled.
Third, 2-methyl-3-nitrobenzoic acid is used as the starting material. First, the carboxyl group is converted into the corresponding acid chloride and treated with thionyl chloride and other reagents. After the halogenation-decarboxylation reaction, such as interacting with copper bromide, pyridine and other reagents, the halogen atom is introduced and decarboxylated at the same time. Then fluoride, such as potassium fluoride, is used for halogen exchange reaction, and finally 1-fluoro-2-methyl-3-nitrobenzene can be obtained. This path step is slightly more complex, but it may have unique advantages in specific situations.
1-Fluoro-2-Methyl-3-Nitrobenzene What are the precautions during storage and transportation?
For 1-fluoro-2-methyl-3-nitrobenzene, many precautions must be taken during storage and transportation.
Its properties are dangerous. When storing, the first thing to do is to choose a cool and well-ventilated place. It is easy to change when covered by heat, so it must be kept away from fire and heat sources to prevent accidents. The temperature of the warehouse should be controlled within a reasonable range. It must not be heated to cause internal pressure to rise sharply, causing accidents.
Furthermore, this substance should be stored in isolation from oxidants, reducing agents, alkalis, etc. Due to its active chemical properties, if it is mixed with them, or has a violent chemical reaction, it will endanger safety. And the storage place should be equipped with suitable materials for containing leaks, so as to prevent accidental leakage and dispose of them in time to avoid greater harm.
During transportation, caution should also be taken. Transportation vehicles must ensure that they are in good condition and have corresponding safety facilities. Transportation personnel need to be professionally trained to be familiar with their dangerous characteristics and emergency disposal methods. During handling, they should be handled with care, and they must not be loaded and unloaded brutally to avoid damage to the packaging and leakage of materials.
In terms of packaging, it must be tight and meet relevant standards to ensure that it is not damaged by vibration and collision during transportation. If there is bad weather during transportation, such as high temperature, rainstorm, etc., corresponding protective measures should be taken, or the transportation should be suspended, and the departure should be carried out when the conditions are suitable. In this way, 1-fluoro-2-methyl-3-nitrobenzene is safe for storage and transportation.