Benzene, 1-Chloro-2-Iodo-4-Nitro-

This compound is called arsenic, which is highly toxic. It is also often mentioned in ancient times and has appeared in many books and stories.
"Tiangong Kaiwu" says: "Arsenic, if you produce silver, you must have it in the land, and the cover is fumigated with its gas, so the side stones are mostly things." Arsenic, the main ingredient is arsenic trioxide, white in color and frost-like, hence the name. Its nature is extremely toxic, and a little can cause death.
Throughout the ages, there have been countless disasters caused by arsenic. In court battles and civil disputes, people often use arsenic as a weapon to secretly murder others. For example, in some koan stories, some villains mixed arsenic into food and medicinal soup, causing innocent people to be poisoned to death.
Although arsenic is highly toxic, it is not completely useless. In the field of traditional Chinese medicine, after special processing, arsenic can be used to treat certain diseases, such as some stubborn sores, malaria, etc. However, extreme caution is required when using it. If the dose is slightly deviated, it will endanger life.
The records of arsenic in Tiangong Kaiwu not only let future generations know its origin, but also remind everyone to be in awe of its toxicity. Don't ignore its harm because it is common. In life, stay away from this thing to avoid being poisoned.

The molecules of this compound are unique. Its molecules are formed by the combination of atoms in a specific way, and the combination of each atom is exquisite, just like the work of heaven.
First, the arrangement of atoms is orderly, forming a specific empty shape. Or the arrangement of the atoms, so that the molecules are, such as; or, like Its degree of directivity determines the qualitative and anti-activity of the molecule. Contingent molecules are present in it, and these molecules attract each other, which gives molecular-specific properties.
The existence of functionalities adds luster to the molecule. Functional molecules refer to specific atoms in the molecule, such as groups, carboxylic groups, amino groups, etc. Their characteristics show that they can make the molecule exhibit its specific chemical activity and polymorphism. For example, the alkyl group is easy to react to water, and the carboxyl group is acidic, which can be neutralized.
The establishment of molecules is also an important property. There are anti-reaction, optical and other phenomena. Due to the limitation of or, the arrangement of atoms or groups in the space is different, resulting in physical. The existence of chiral centers in the molecules of light causes them to form a reflection of each other's images, and the optical rotation of their polarized light is opposite.
In other words, the molecules of compounds are composed of elements such as atomic arrangement, transformation, functional function, and vertical transformation. Each element affects each other, co-shaping the characteristics of molecules, and containing the wonders of transformation, just like the fine work created by heaven.

This compound may have the following chemical properties:
First, it is acidic and alkaline. Under specific circumstances, it may exhibit acidity and can neutralize and react with alkali substances to form salts and water. In case of strong bases such as sodium hydroxide, depending on the acidity of the compound, it may react rapidly to change the pH value of the solution. At the same time, under certain conditions, it may also exhibit alkalinity and react with acids.
Second, it has redox properties. If the compound contains elements that are prone to losing electrons, such as low-valent metal ions or specific functional groups, it is easily oxidized in the presence of suitable oxidants, and the valence of its own elements increases. Conversely, if it contains elements that are easy to obtain electrons, such as high-valent non-metallic elements, it can be reduced under the action of reducing agents, and the valence decreases.
Third, there are differences in stability. Some compounds have stable chemical bonds, and it is difficult to chemically react under general environments and conditions, and their properties are stable. Some compounds have relatively weak chemical bonds, and are easy to decompose or undergo structural changes when exposed to heat, light or specific substances. Such as some organic compounds, photolysis may occur under light and decompose into small molecule substances.
Fourth, solubility. Different compounds have different solubility in various solvents. Some are easily soluble in water, because the molecular structure forms hydrogen bonds or other interactions with water. Some non-polar compounds, on the other hand, are more soluble in organic solvents, such as ethanol, ether, etc., and follow the principle of similar compatibility.
Fifth, or participate in complexation reactions. If the compound contains atoms that can provide lone pairs of electrons, such as nitrogen, oxygen, etc., it can form coordination bonds with metal ions to form complexes, and the properties of the complexes may be very different from those of the original compounds.

This compound has a wide range of applications. In the field of engineering, it can help the shape and quality of utensils and increase their durability. For example, in the industry of forging swords, adding appropriate compounds can make the blade both rigid and soft, and cut iron like mud, killing the enemy on the battlefield to win, which is very effective.
In the realm of medicine, it is also very useful. Some compounds can be made into good medicines, healing various diseases and saving lives. For example, using a specific combination method to concoct herbs can enhance their medicinal power, more accurately remove diseases and diseases, and enable patients to recover.
Furthermore, in the case of mulberry farming, the compound can be made into fertilizer to nourish soil and promote crop growth. Make the crop lush, the fruit is fruitful, and the food for people's livelihood is guaranteed. In the fields, rational application can increase the soil strength and ensure a bumper harvest every year.
In the way of daily use, it is also indispensable. For example, pottery and porcelain, adding this compound can improve the texture of the clay, make the surface of the porcelain smooth and delicate, colorful, not only practical value, but also add ornamental beauty. Even in the industry of weaving and dyeing, the compound can help the dye to adhere better, make the fabric colorful and lasting, and enrich the clothes of the world.
It can be seen that this compound has its unique use in the fields of industry, medicine, agriculture, and daily use. It has far-reaching influence and is related to people's livelihood. It cannot be underestimated.

To prepare this compound, there are many methods of synthesis, which are described in detail as follows.
One of them can be achieved through classical condensation reactions. Using active functional group compounds as raw materials, with the help of suitable reaction conditions and catalysts, condensation occurs between molecules to build the basic skeleton of the target compound. For example, select a compound containing carbonyl and amino groups. In an acidic or basic catalytic environment, the amino group launches a nucleophilic attack on the carbonyl group. After a series of rearrangement, dehydration and other steps, key chemical bonds can be formed to complete the preliminary synthesis. The advantage of this method is that the reaction path is clear and the conditions are relatively mild, which can be implemented in most laboratories; however, its disadvantages are also more significant, and there are many side reactions. Fine control of reaction conditions is required to improve product purity and yield.
Second, the coupling reaction with the help of metal catalysis is also a commonly used method. Transition metal complexes are used as catalysts to promote the coupling of halogenated hydrocarbons or other compounds with leaving groups with nucleophiles. For example, the Suzuki coupling reaction catalyzed by palladium, halogenated aromatics and arylboronic acids can efficiently form carbon-carbon bonds under the action of palladium catalysts and bases. The advantages of this method are high selectivity and strong reactivity, which can be used to construct complex molecular structures; however, the requirements for reaction raw materials are high, metal catalysts are expensive, and post-reaction treatment may require special means to remove residual metals.
Third, biosynthesis is also a way. Using enzymes or microorganisms in vivo to synthesize target compounds through specific metabolic pathways. Biological enzymes have high specificity and catalytic efficiency, and can achieve complex chemical reactions under mild conditions. For example, some microorganisms can synthesize specific organic compounds through their own metabolic mechanisms. This method is green and environmentally friendly, the reaction conditions are mild, and the product purity is high; however, the biological system is complex, the control of the reaction conditions is extremely strict, and the screening and culture of biocatalysts is quite difficult.
Or use a cyclization reaction strategy, select suitable chain compounds, and form a cyclic structure of the target compound through molecular cyclization reaction. Under suitable reaction reagents and conditions, chain molecules can undergo nucleophilic substitution, addition and other reactions in molecules, closing the loop to form the required cyclic skeleton. This method can effectively construct compounds with specific cyclic structures, but the structure and reaction conditions of the chain-like raw materials need to be precisely designed to ensure the smooth progress of the cyclization reaction.
All these synthetic methods have their own advantages and disadvantages. In practice, it is necessary to carefully choose the appropriate synthetic path according to the structural characteristics of the compound, experimental conditions and expected targets to achieve the best synthetic effect.