2-(2-thiophene) ethanol p-toluenesulfonate

In the context of "Tiangong Kaiwu", the chemical properties of 2 - (2 - arsenic) mercury silver to methyl mercaptan are as follows:
Mercury, which is active and liquid at room temperature, has good fluidity and metallic luster. Mercury is prone to form amalgams with various metals. When in contact with sulfur-containing compounds, mercury can chemically react with sulfur to form mercury sulfide. Mercury sulfide is relatively stable in nature and often has a red color. This reaction can be regarded as an affinity of mercury to sulfur-containing substances.
Arsenic, that is, arsenic trioxide, is a white powdery solid and is highly toxic. Arsenic in arsenic is in the + 3 valence state and has certain oxidizing properties. Under specific conditions, it can react with the reducing agent, and its arsenic valence is reduced. When arsenic meets sulfur-containing compounds, under certain conditions, arsenic may have complex chemical reactions with sulfur, changing its own chemical form.
Methanethiol has a special odor, and its molecular structure contains thiohydrogen groups. Due to the electronegative characteristics of sulfur atoms, methanethiol has certain reductivity, and the hydrogen atoms in thiohydrogen groups have certain activity, and substitution and other reactions can occur under appropriate conditions.
When mercury silver comes into contact with methyl mercaptan, due to its affinity for sulfur, mercury may combine with the sulfur atoms in methyl mercaptan, causing the structure of methyl mercaptan to be damaged and a chemical reaction occurs, resulting in the formation of mercury-containing sulfides and other new substances. When arsenic exists, due to its oxidizing properties, it may affect the process and direction of the reaction between mercury and methyl mercaptan. Arsenic may first react with the reducing part of methyl mercaptan, changing the chemical properties of methyl mercaptan, and then indirectly affecting the reaction between mercury and methyl mercaptan; or arsenic, mercury and methyl mercaptan may simultaneously undergo complex chemical reactions, generating a variety of compounds containing arsenic, mercury, sulfur and other elements.

To prepare di- (2-imidazole) ethyl ether p-toluenesulfonate, the preparation method is as follows:
First take an appropriate amount of 2-imidazole ethanol and place it in a clean reaction vessel. Another p-toluenesulfonyl chloride is taken and slowly added to the above reaction vessel according to a certain stoichiometric ratio. During this process, attention should be paid to controlling the reaction temperature, usually maintained in a low temperature environment, such as 0-5 ° C, to prevent side reactions from occurring. At the same time, add a suitable organic base, such as pyridine, which can act as an acid binding agent to promote the reaction in a positive direction. During the reaction, continue to stir to make full contact with the reactants to accelerate the reaction process.
After the addition of p-toluenesulfonyl chloride is completed, maintain this reaction condition for a period of time, about several hours, depending on the reaction monitoring results. The progress of the reaction can be monitored in real time by means of thin layer chromatography (TLC) until the raw material point almost disappears, indicating that the reaction is basically completed. After
, the reaction mixture is post-treated. An appropriate amount of water is added to it first to quench the unreacted p-toluenesulfonyl chloride and the salt formed by pyridine and the generated hydrogen chloride. Then, an organic solvent is used for extraction, such as dichloromethane, ethyl acetate, etc., and the product is extracted multiple times to ensure that the product is fully transferred to the organic phase. After the organic phases are combined, they are washed with dilute hydrochloric acid, saturated sodium bicarbonate solution, and water in turn to remove residual impurities in the organic phase. Then the organic phases are dried with a desiccant such as anhydrous sodium sulfate to remove the moisture contained therein.
Finally, the organic solvent is removed by vacuum distillation to obtain a crude product. For further purification, a method of recrystallization can be used, and a suitable solvent can be selected, such as ethanol-water mixed solvent, etc. After multiple recrystallization operations, pure bis- (2-imidazole) ethyl ether p-toluenesulfonate can be obtained.

"Tiangong Kaiwu" contains that mirabilite is used in saltpeter, saltpeter and other categories, and has wonderful uses in many fields.
Mirabilite is used in the field of medicine, and its effect is significant. It has the ability to laxative, laxative, and treat the symptoms of stagnation of real heat in the stomach and dry stool. It also has the power of clearing away heat and reducing swelling. It can be applied externally to swollen and painful areas of sores to relieve their symptoms. This is because of the salty, bitter and cold taste of mirabilite. It enters the stomach and large intestine, so it can have this medicinal effect.
In the industrial field, mirabilite is also indispensable. In glass manufacturing, mirabilite is a commonly used raw material, which can help reduce the melting point of glass and improve the quality and yield of glass. In the paper industry, its key role is in the pulping process, which can improve the yield and quality of pulp, making the paper tougher and smoother. In the printing and dyeing industry, mirabilite can be used as a dye facilitator to help dyes better adhere to fabrics, improve dyeing effect, and make the color bright and lasting.
In agriculture, mirabilite also has its uses. Appropriate application of mirabilite can adjust soil pH, improve alkaline soil, and make the soil more suitable for crop growth. At the same time, mirabilite contains sodium, sulfur and other elements, which can supplement nutrients for plants, enhance crop resistance, and improve yield and quality.
It can be seen that mirabilite plays an important role in many fields such as medicine, industry, and agriculture, and is actually a widely used substance.

What is the current situation in the city where two - (two-pentagene) Jigeng are found to be sour and salty?
The supply and demand of the city are related to each other. The sour and salty of the city is also related to the city, and the parties involved are not determined at one end. In the land of pentagene, if the goods are not sold, the two-pentagene will be sold, or the sour and salty goods used by Jigeng will be greatly increased in the city. If so, the supply is not needed, and the demand will be reduced. There are too many people who want it, and there are few merchants who want to sell their goods, so they have to sell them.
However, if there is a limit to the amount of money we have, and the amount of money we have is not enough to shake it, and the salts and acids of A Xin are needed by everyone. If you ask for it, you will not be able to supply it. If you chase people away, you will rise up.
And there are foreign affairs like this, you can also control it. Such as the transportation of the four directions, if you can pass the way, the salts and acids of other places can be easily reached, and the supply of it can be increased, and it can be improved. If it is blocked, the salts and acids of A Xin will be supplied to the same place, and it will also be suppressed.
Furthermore, it is not enough to make it difficult, and it is not common.
In order to make it appropriate, the use of sour and salty, or high; if it is vulgar and good, those who seek it will also be sent, and they will be sent.
In order to make it, the city of two- (two-pentagene) hexin is a city that shows sour and salty, whether it is rising or falling or flat, and it is the transformation of supply and demand, transportation, orders, customs, etc., to be uniform.

In order to know "what are the preservation conditions of the Erlitou ruins for the study of summer history", it is necessary to study the relevant books and the results of field investigations in detail.
The Erlitou ruins are located in the Central Plains, and their soil texture and climatic conditions are particularly critical for the preservation of cultural relics. The soil here is moderately viscous and has a certain degree of compactness, which can provide a stable burial environment for utensils. In addition, the climate of the Central Plains is distinct in four seasons. Although there are occasional droughts and floods, in general, it is not a place of extreme cold and extreme heat, which provides relatively suitable external conditions for the preservation of organic and inorganic matter.
In terms of the layout of the ruins, the planning is orderly. The division of palaces, workshops, tombs, etc. is clear, and this orderly layout allows all kinds of relics to interfere with each other less over the long years, and each preserves its own historical information. The rammed earth of the palace site is solid, and although it has been eroded by wind and rain for thousands of years, it can still retain its general outline, providing important clues for future generations to study the building regulations and social hierarchy at that time.
The preservation conditions of tombs cannot be ignored. The material of coffins and the depth of burial affect the retention of funeral objects. Some tombs are buried deep in the ground, and they are well sealed to effectively isolate air and moisture, so that bronzes, jade and other funeral objects can be well preserved. The patterns and inscriptions on them are clearly distinguishable, providing conclusive evidence for the interpretation of the etiquette system and craftsmanship of Xia history.
In the remains of the workshop, the preservation of tools and work in progress reflects the production technology and process at that time. Its location is high, the drainage is convenient, and it avoids the damage of long-term flooding to the remains, preserving the original appearance of many production activities.
With its unique geographical environment, orderly layout and good burial conditions, the Erlitou ruins retain rich and precious physical data for the study of Xia history, which is of great significance for exploring the evolution of early Chinese civilization.