Dibenzothiophene-4-boronic acid pinacol ester

Borax is the common name of sodium tetraborate, and its chemical properties are unique. Borax is a white crystalline powder that is easily soluble in water, and its aqueous solution is alkaline.
Borax in aqueous solution will undergo hydrolysis reaction. Borate ions will combine with hydrogen ions ionized by water, causing the concentration of hydroxide ions in the solution to increase, so it is alkaline. This alkaline property has important uses in many fields.
Borax has certain reducing properties. Under certain conditions, the valence of boron in borax can change and can participate in redox reactions. For example, in some metallurgical processes, borax can play the role of a reducing agent to help the metal to reduce and precipitate from its compounds.
Borax can react with acids to form boric acid. Boric acid is a weak acid. Under certain conditions, borax reacts with strong acids, and borate ions combine with hydrogen ions to form boric acid. This reaction is crucial in chemical analysis and some chemical production.
Borax also has the property of forming complexes. The outer electronic structure of boron element enables it to form complexes with some substances with solitary pair electrons. This property has important applications in the synthesis and catalytic reactions of some materials, and helps to construct compounds with special structures and functions.
These chemical properties of borax make it widely used in industry, medicine, scientific research and many other fields. It plays a unique role in the processes involved in the ancient "Tiangong Kaiwu" or as an important material.

The two immortals are both strange, related to the frequency of oxalic acid, and there are various common synthesis methods. The ancient craftsmen also studied the method of synthesizing oxalic acid.
One is the sodium formate method. This is to use carbon monoxide and sodium hydroxide under high temperature and pressure to synthesize sodium formate, and then the sodium formate is transformed into sodium oxalate through dehydrogenation, and then interacts with sulfuric acid to synthesize oxalic acid. The process is like the ancient alchemy, which requires delicate conditions and steps. First, carbon monoxide and sodium hydroxide are combined, which is like the fusion of yin and yang to form sodium formate, which is the starting basis. Then the dehydrogenation changes, just like removing its impurities to make it pure. Finally, it reacts with sulfuric acid to obtain oxalic acid, which is like turning decay into magic. < Br >
Its oxidation method. Carbohydrates such as starch and glucose are used as starting materials, and oxalic acid is obtained by oxidizing them with the help of oxidizing agents such as nitric acid and air. It is like using all kinds of materials, using the force of nature to transform them. Carbohydrates are like jade, which are carved by oxidizing agents, and finally become the beauty of oxalic acid. When nitric acid is used as an oxidizing agent, the reaction is violent, and it needs to be carefully controlled. It is just like controlling a strong horse and not letting it get out of control. Using air as an oxidizing agent, although mild, it takes a long time and requires patience.
Third, carbonyl synthesis method. Using ethylene glycol or glycolic acid as raw material, with the help of catalyst, carbonylation reaction with carbon monoxide occurs, and then hydrolysis and other steps, oxalic acid is obtained. This is the ability of the catalyst to make the material change in a specific way. Ethylene glycol or glycolic acid, guided by the catalyst, meets carbon monoxide, just like a scholar who has been guided by a famous teacher, to the right path of synthesizing oxalic acid. The step of hydrolysis is like wrapping it up and showing the true content of oxalic acid.
These several synthesis methods, each with its own beauty, convenience, economy, or environmental protection, are all common ways to produce oxalic acid. Throughout the ages, craftsmen have been grinding it in practice to make it more and more exquisite.

Those who combine two immortals and dijia have the frequency of oxalic acid. Those with the frequency of oxalic acid are useful in many fields.
In the field of medicine, oxalic acid and its related compounds can be used for the preparation of specific drugs. Given its chemical properties, it can participate in the reaction of drug synthesis and help to form the molecular structure of some drugs with special curative effects. For example, some of the drugs used to regulate the metabolism of minerals in the body, the ingredients of oxalic acid can be delicately matched to the physiological mechanism of the human body, so as to achieve better therapeutic effect.
In the industrial field, oxalic acid is often used for metal surface treatment. If metal utensils are to be finely processed, rust and impurities on the surface often need to be removed. Due to its acidic properties, oxalic acid can chemically react with oxides such as rust, dissolve it and remove it, making the metal surface as smooth as ever, thereby improving the quality and service life of metal products. And in the printing and dyeing industry, oxalic acid can be used as a mordant to help dyes adhere better to fabrics, making the dyeing effect more uniform and lasting.
Furthermore, in scientific research experiments, oxalic acid is a common chemical reagent and has a wide range of uses. In the field of analytical chemistry, it is often used to calibrate the concentration of alkali solution. With its accurate chemical reaction measurement relationship, it provides accurate data support for chemical analysis. At the same time, in some biochemical experiments, oxalic acid can be used to adjust the pH of the reaction system to create an environment suitable for biochemical reactions to occur, and help researchers explore the mysteries of life science.
As for where the frequency of oxalic acid is most critical, it is difficult to generalize. Medicine is related to life and health, industry affects production and manufacturing, and scientific research promotes knowledge progress, all of which are crucial and indispensable. According to their needs, various fields make rational use of the frequency-related characteristics of oxalic acid to achieve all things.

What is the market price of those who are both sour and astringent? This question is related to the commercial price, and it also involves the value of various herbs. Looking at "Tiangong Kaiwu", although the market price of those who are both sour and astringent is not detailed, it can be deduced from the reasons of various things.
The price of various medicines often depends on their place of origin, their thinness, and their wide and narrow use. If those who are both sour and astringent are rich in yield and common in their places, the price will be equal. If there are many things to cover, it will be easy for people to obtain, and those who are in a hurry will not be in a hurry, and the price will not be high. For example, the medicine of ordinary plants and trees, which is all over the mountains and fields, is not difficult to harvest, and its price is cheap.
On the contrary, if its production is remote, it is difficult to collect, and it is rare like a star phoenix, and the world is competing for it, then the price will be high. Such as ginseng, which can be found in deep mountains and old forests, the pickers often risk their lives, and everyone uses it as a tonic medicine and competes to buy it, so the price is very high.
And looking at its use, if the acidity and frequency of the grass have special effects, it can heal the disease, doctors compete for it, and the dignitaries also ask for it, the price is undoubtedly expensive. If it is only an ordinary thing, it has no surprising function, and it is difficult to have a high price even if it is rare.
Prices in the city are determined by the principle of supply and demand. If you produce more and use less, the price will be low; if you produce less and use more, the price will be expensive. Although "Tiangong Kaiwu" does not explicitly state its price, according to this reason, you can also get its approximate price.

What are the storage conditions for saltpeter? "Tiangong Kaiwu" says: "Where nitrate is produced in Huayi, China is exclusively produced in the northwest. Its quality is born with the soil. Those who come out of Shanxi are called salt nitrate, and those who are born in Shandong are called earth nitrate." The storage of saltpeter is the first to dry. Its properties are easy to deliquescence. If it is placed in a humid place, it will melt into water for a long time and lose its properties. Therefore, choose a high-dryness place to avoid water and moisture.
It is also necessary to avoid heat. Saltpeter is easily changed when heated, or its performance changes, or even dangerous. It should be stored in a cool place, away from fire and heat sources, and should not be heated.
and should be isolated. Saltpeter should not be mixed with other things, especially flammable and flammable things, to prevent interaction and cause disasters. When it is contained in an independent vessel, it is properly sealed and separated from other things to ensure its safety.
Furthermore, anti-vibration. Violent vibration or change the internal structure of saltpeter, affecting its quality, so the storage place should be stable, shock-proof and bumpy.
Under these conditions, saltpeter can be properly stored to ensure its performance and ready for use.