1,3-Dibromo-5-chloro-2-iodobenzene is an important organic synthesis intermediate, which has key uses in medicine, pesticides, materials and other fields.
In the field of medicine, as a key intermediate, it can be used to synthesize many specific drugs. For example, in the development of anti-tumor drugs, using this as the starting material, through specific chemical reactions, molecules with unique structures and biological activities can be constructed. These molecules may act precisely on specific targets of tumor cells, inhibit tumor cell proliferation, and provide new opportunities for cancer treatment. For example, in the synthesis of antibacterial drugs, 1,3-dibromo-5-chloro-2-iodobenzene participates in the reaction, which can endow the drug with unique antibacterial properties and enhance its ability to inhibit and kill specific bacteria.
In the field of pesticides, its role is also indispensable. It can be used to create new and efficient pesticides. For example, by reacting with other organic compounds, pesticides with high selectivity, low toxicity and environmental friendliness are synthesized. These pesticides have strong killing power against pests, but have little impact on beneficial insects and the environment, which helps to achieve sustainable agricultural development. For example, for common crop pests, the synthetic pesticides can precisely act on the nervous system or physiological metabolic pathways of pests, effectively control pests, and ensure crop yield and quality.
In the field of materials, 1,3-dibromo-5-chloro-2-iodobenzene can be used to prepare functional materials. For example, in the synthesis of organic optoelectronic materials, its participation in the reaction can regulate the photoelectric properties of materials. With the help of rational molecular design and reaction conditions control, materials with excellent luminescence properties or charge transport properties can be prepared, which can be used in organic Light Emitting Diodes (OLEDs), solar cells and other fields. In OLEDs, such materials may improve luminous efficiency and device stability, and promote the development of display technology; in solar cells, they may improve photoelectric conversion efficiency and promote renewable energy utilization.

The synthesis method of 1% 2C3-dibromo-5-pentene-2-one can be prepared according to the ancient method.
First, pentenone is used as the base, supplemented by a brominating agent, and the bromination reaction is carried out in a suitable environment. Brominating agents, such as liquid bromine, N-bromosuccinimide (NBS), etc. If liquid bromine is used, the dosage and reaction temperature must be carefully controlled to avoid excessive bromination. During the reaction, it is suitable to slowly add liquid bromine dropwise to the solution of pentenone at low temperature, and dissolve it in an inert solvent, such as dichloromethane, carbon tetrachloride, etc. At the same time, appropriate catalysts, such as Lewis acids, can promote the reaction and increase the yield.
Second, start with the corresponding alcohols. First, the pentene-2-ol is oxidized to pentene-2-one. The oxidizing agent can be selected from potassium dichromate-sulfuric acid system, PCC (pyridinium chlorochromate salt), etc. After obtaining pentene-2-one, bromine atoms are introduced as described above to form 1% 2C3-dibromo-5-pentene-2-one.
Or, start with halogenated hydrocarbons. Select an appropriate halogenated pentene and introduce a carbonyl group through a nucleophilic substitution reaction. Commonly used nucleophilic reagents, such as enolates of ethyl acetoacetate, etc., through a series of steps such as hydrolysis and decarboxylation, pentene-2-one is obtained first, and then brominated to obtain the target product.
When synthesizing, all conditions must be strictly controlled. The reaction temperature, time, and the proportion of reactants are all related to the quality and quantity of the product. And after each step of the reaction, the product should be refined by suitable methods, such as distillation, column chromatography, etc., and its impurities can be removed to obtain pure 1% 2C3-dibromo-5-pentene-2-one.

1% 2C3-dibromo-5-chloro-2-fluorobenzene is an organic halide. Its physical properties are as follows:
- ** Appearance and Properties **: Normally, it is mostly colorless to light yellow liquid or solid, depending on its purity and the ambient temperature. This compound is formed by different halogen atoms replacing hydrogen atoms on the benzene ring, and its structure causes its appearance to exhibit a specific physical state.
- ** Melting Boiling Point **: Due to the presence of halogen atoms between molecules, the electronegativity of halogen atoms is large, which enhances the intermolecular force, especially the presence of halogen atoms with relatively large atomic masses such as bromine and chlorine, so its melting boiling point is relatively high. However, the exact melting boiling point value will vary due to impurities, molecular space arrangement and other factors. Generally speaking, the melting point may be in the range of tens of degrees Celsius, and the boiling point may be in the hundreds of degrees Celsius.
- ** Solubility **: It is a non-polar or weakly polar organic compound. According to the principle of "similar miscibility", it exhibits good solubility in non-polar or weakly polar organic solvents, such as benzene, toluene, dichloromethane, etc.; while in highly polar water, the solubility is poor. This is due to the formation of hydrogen bonds between water molecules and the tight structure. Non-polar 1% 2C3-dibromo-5-chloro-2-fluorobenzene is difficult to destroy its structure and mix with it.
- ** Density **: Due to the large relative atomic weight of halogen atoms, the density of this compound is greater than that of common organic solvents and water. The halogen atoms inside the molecule occupy a certain space, resulting in an increase in mass per unit volume. In chemical operations or research, this property is crucial for separation, extraction and other links.

1% 2C3-dibromo-5-pentene-2-one is an organic compound. When storing and transporting, the following matters must be paid attention to:
** Storage **:
First, because of its chemical activity, it should be stored in a cool and well-ventilated place. Extreme heat can easily cause its chemical reactivity to intensify, or cause adverse reactions such as decomposition and polymerization. As "Tiangong Kaiwu" said: "The storage of things should be allowed to go with its own nature, and it should be kept cool and protected from heat." If it is placed in a high temperature place, the quality of Juhe seedlings will be damaged when exposed to the hot sun.
Second, it needs to be stored separately from oxidants, acids, alkalis, etc., and must not be mixed. This is because of its active chemical properties, contact with the above substances can easily trigger violent chemical reactions, such as combustion, explosion, etc. Just like water and fire are incompatible, things of different properties should not be mixed.
Third, the storage container must be tightly sealed. This compound may be sensitive to air and moisture, and the seal can prevent it from deteriorating in contact with air and moisture. It is like a strong city wall to guard against external threats.
Fourth, the storage area should be equipped with suitable materials to contain leaks. In case of leakage, it can be dealt with in time to avoid causing greater harm.
** Transportation **:
First, the transportation vehicle must ensure that the vehicle is in good condition and has corresponding fire and explosion-proof safety facilities. Because of its potential danger, it is necessary to be in the abyss and walking on thin ice during transportation to prevent sparks, hot topics, etc. from causing danger.
Second, it is necessary to prevent it from being heated and damp during transportation. On the road, the weather is changeable, and it is necessary to be properly protected from the influence of the external environment.
Third, when loading and unloading, it should be handled with care, and it is strictly forbidden to drop and heavy pressure. The structure of this compound may be relatively fragile, and rough loading and unloading can easily cause packaging damage and cause leakage. Just as "Tiangong Kaiwu" mentioned the caution of handling utensils, the same should be done with this chemical.
Fourth, transportation personnel must be professionally trained to be familiar with the dangerous characteristics of the compound and emergency treatment methods. Only in this way can they respond calmly and avoid danger in the face of emergencies.

What you are asking about is the market price range of 1,3-dibromo-5-chloro-2-fluorobenzene. However, the price of this product cannot be hidden in a single word, and it is affected by many factors.
The first to bear the brunt is the price of raw materials. If the price of the raw materials required for the preparation of this compound is high and fluctuates frequently, the price of the finished product will also fluctuate accordingly. For example, if the raw materials are scarce, or the supply is insufficient due to weather, geographical location, or man-made reasons, the price will rise.
Second, the difficulty of the process is also related to the price. If the preparation method is complicated, requires exquisite equipment, superb skills, and is accompanied by many intermediate steps, which consumes a lot of manpower and material resources, the cost will be high and the price will be high.
Furthermore, the state of market supply and demand is the key. If there are many people seeking, but there are few producers, and the supply is in short supply, the price will be high; conversely, if there is excess capacity, the demand is small, and the supply exceeds the demand, the price will be lower.
In addition, regional differences also affect the price. In different places, the price varies due to different transportation costs, tax policies, and market competition.
Generally speaking, in the current market, the price range of 1,3-dibromo-5-chloro-2-fluorobenzene, or due to the above factors, ranges from a few hundred to several thousand yuan per kilogram. However, this is only a rough estimate. The actual price depends on factors such as the time, place and volume of the transaction. At the time of transaction, the exact price can only be known when you carefully observe market dynamics and inquire from multiple parties.