2-bromo-5-iodopyridine

The objects referred to in 2-% E6% BA% B4 - 5-% E7% A2% 98 may not have a direct and precise understanding in ancient books. However, it can be omitted from the observation and inference of ancient objects based on the normal practice of physics.
First of all, 2-% E6% BA% B4, the water is in the shape of a flow, soft and flexible. The shape of water is in the shape of a device, and it is in the shape of a square, and it is in the shape of a river. It is clear and clear, and ordinary people's eyesight can be transparent, but when they encounter things, they can be used and dissolved. " It is said that "the nature of water is not clear, and it cannot be flat. It cannot be clear without flowing." It is said that water needs to flow in order to be clear. And water has the nature of cold, often in the form of liquid, cold and ice, and it can be transformed into water. This is the third transformation of water.
Another 5-% E7% A2% 98, the ancient stone and jade can be made of stone. The stone is hard and heavy, which is different from the soft flow of water. Its shape is different from the angle, large or small, or whole or strange. The color of the stone is different, including blue, white, black, red, etc. The stone is hard, and can be used as utensils and walls. "Wenjiezi" said: "Stone, mountain stone is also. Under the sea; mouth, pictogram. "The stone nature is fixed, and the stone is rotten, and the moon is full of frost without breaking it. However, the stone is also divided into heavy, and the heavy one is like a stone, which sinks in water; the heavy one is like a pumice stone, which can float on water.
Therefore, 2-% E6% BA% B4 has the properties of flow, clarity, and three-dimensional; 5-% E7% A2% 98 has the characteristics of hardness, thickness, multiple shapes and colors, and the nature is fixed. The physical properties of the two are different from the earth, and they are both natural things of heaven and earth. They have their own uses in the lives of the ancients, and they are also important for the ancients to observe nature and explore physical properties.

2-%E6%BA%B4-5-%E7%A2%98%E5%90%A1, its chemical properties are not rich. In this compound, the 2-carboxyl group has a certain nuclear property, such as nuclear substitution antigenicity. It can be used to generate antigenicity, and the oxygen atom in the antigenicity group can be used to replace part of the positive carbon atom in the antigenicity by means of its solitary particles. Moreover, the 5-carboxyl group is acidic and can be used to generate neutralization and antigenicity. In the case of oxidation, the oxygen group in the carboxyl group can be combined to generate water, and the carboxyl group can form a carboxylic acid. This property can be used in the synthesis of antigenicity, and can also be used in the separation of compounds.
In addition, the carboxyl group and the alkyl group in the alkyl compound can be esterified and reversed under the appropriate conditions. There is a catalyst such as sulfuric acid, and the alkyl atom in the alkyl group of the alkyl group in the carboxyl group dehydrates to a molecule of water to form an ester group. The esterification reaction is very useful in the fields of fragrance and alkyl synthesis, etc., which can be used to synthesize compounds with specific functions and properties.
The same, due to the presence of the alkyl group and the carboxyl group, this compound has a certain water content, and can form alkyl molecules, which makes it have a certain solubility in water. This material is also effective in the process of biological and other processes. In addition, the 2-5-carboxyl group has an important position in the polychemical reaction and chemical application.

The common synthesis methods of 2-% E6% BA% B4 - 5-%E7%A2%98%E5%90%A1 are generally as follows:
One-way precipitation method. This method is to use specific inversion to generate a precipitation in the solution, and then obtain 2-% E6% BA% B4 - 5-%E7%A2%98%E5%90%A1. For example, a solution containing specific gold particles can be obtained, a phase can be added, and the reaction components can be controlled, such as temperature, pH value, etc., so that the object can be precipitated in the form of precipitation. It is easy to operate the phase, and the required temperature is not low. However, the lack of clarity is clear, the precipitation process is easy to introduce, and the degree and morphology of the sediment are controlled.
The second water synthesis method. This is in the high-temperature water environment, to promote the reaction of the reaction material to synthesize the object. The water environment can change the activity and reaction of the reaction material, which is beneficial to the formation of good crystal form and complete morphology of 2-% E6% BA% B4 - 5-%E7%A2%98%E5%90%A1. The operation requires the reaction material to be placed in the high-temperature reaction kettle to control the water degree, temperature, etc. It can be used to synthesize materials with high temperature and special morphology; however, the lack of cost is high, high-temperature operation has certain risks, and the cost is high.
The three-solution synthesis method. This water synthesis method is similar, but the only solution is to replace water as a reaction medium. The characteristic of dissolution can control the solubility, reaction activity and morphology of the reaction material. It can be synthesized from 2-% E6% BA% B4 - 5-%E7%A2%98%E5%90%A1 by controlling the anti-dissolving parts. It can synthesize materials with special properties, and some of them have good results in water. However, some of them are soluble and flammable, and the operation needs to pay attention to safety, and some of them are soluble and costly.
Its four-phase solid-state synthesis method. The solid-state reactants are mixed in a certain proportion, and 2-% E6% BA% B4 - 5-%E7%A2%98%E5%90%A1 is synthesized by grinding and high-temperature calcination. The method of operation requires special dissolution; however, the mixing of the reactants is uniform, the reverse rate is slow, and the calcination process energy consumption is large, and the reactants are prone to phase.

"Tiangong Kaiwu" says: "The second one is used in all aspects, and each is suitable. The fifth one has a wide range of applications.
Among the two, one is in the art of alchemy, which is often used. Ancient alchemists wanted the medicine of immortality, and in the process of alchemy, they often used this as a medicine to help them become pills. Furthermore, in the field of medicine, after being processed, this medicine can be used as medicine to treat sores, swelling and poison. With its special nature, it can extract poison and reduce swelling, which is very effective. The second one is in metallurgy, and it is also useful. It can help ore separation, purify metals, and lay the foundation for casting fine instruments.
As for the fifth one, it is indispensable in the ceramic firing industry. With its adjustment of the characteristics of the glaze, the glaze surface is smooth and radiant, and the color is gorgeous. In the printing and dyeing industry, Wuzhuang can be used as a mordant to make the dye better adhere to the fabric, and the color is firm and bright. In chemical synthesis, Wuzhuang is an important raw material, participating in many chemical reactions to produce various chemical products. In the field of building materials, the appropriate amount of Wuzhuang can improve the properties of the material, such as enhancing its hardness and water resistance. In addition, in the leather tanning process, Wuzhuang can make the leather soft and durable, and improve the quality of the leather. It can be seen that Erzhuang and Wuzhuang have important applications in alchemy, medicine, metallurgy, ceramics, printing and dyeing, chemical industry, construction, leather and many other fields.

Today, there are two or five kinds of utensils, and what is the market value?
The market's determination is not limited to one end. The supply and demand are one of the most important factors. If this object is in the market, those who ask for it will not be available, and those who supply it will not be available, so "the goods will be thin", and the price will be high. On the contrary, if the supply is in demand, and the city is flooded, there will be good quality, and the price will also be high.
Furthermore, the inferiority of the earth is also deep. If this utensil is made of exquisite materials, excellent materials, and well-crafted, it will be natural, and the defects will be high. However, if the material is ordinary, the workmanship is crude, and the value is high.
It is also a good thing, and it also makes it good. In times of peace and prosperity, the people are rich and like to play, and this utensil may increase in value because of it; if you encounter a good world, your people's livelihood is poor, your clothes and food are not yet comprehensive, and your clothes and food are not yet complete.
And the places of exchange are different, and there are also differences. In Dayi, the capital of Tongdu, where commerce is concentrated, there are many rich people, and those who are old-fashioned are also poor, or high; in small towns in remote areas, there are few people and people, and most of them are compared.
Therefore, if you want to know the market of these two or five utensil, and it is combined and managed, you can get all the elements such as supply and demand, land, money, and trading places.