1.2.3.4-tetra-hydroquinoline

Tetrafuran, a chemical compound, has its main use.
In the field of chemical synthesis, tetrafuran is often non-soluble. Because of its good solubility, it can dissolve many chemical compounds, such as alcohol, alcohol, ether, aldehyde, ketone, etc. In many chemical reactions, such as Grignard's reaction, tetrafuran is used as a solution, which can make the reaction substance fully mixed, accelerate the reaction process, and improve the reaction efficiency. And its properties are well-defined, and it is not easy to cause reactions to produce side reactions, so as to ensure the reaction.
In the polymer material industry, tetrafuran also plays an important role. It can be used in the preparation of polyurethane, polyether polyol and other polymer materials. Taking the synthesis of polyether polyols as an example, tetrafuran can be polymerized to form polytetrafuran ether diol, which is an important raw material for the synthesis of high-performance polyurethane properties. The obtained polyurethane properties have wear resistance, oil resistance and durability, and are widely used in shoe soles, tires, and other fields.
Furthermore, tetrafuran is also used in the chemical field. In the hydrolysis solution of the hydrolysis solution of the hydrolysis solution, it can be used as one of the components to improve the performance of the hydrolysis solution and the compatibility of the hydrolysis material, and improve the performance of the hydrolysis solution, such as charging and discharging efficiency and life cycle.
In addition, tetrafuran is also used for the extraction and synthesis of natural compounds and flavors, providing a good reaction environment for the extraction and synthesis of various compounds.

Tetracyanoethylene is an organic compound with unique physical properties, which are detailed as follows:
First, in terms of appearance, tetracyanoethylene is normally a yellow crystal. This color and shape are derived from the absorption and reflection characteristics of its molecular structure to light. Its molecular structure causes electrons to transition to absorb visible light at specific wavelengths, resulting in yellow color; and intermolecular forces make it exist in a crystalline form.
Second, when it comes to melting and boiling points, tetracyanoethylene has a melting point of about 198 ° C and a boiling point of about 223 ° C. This value is derived from the type and strength of intermolecular forces. Its molecules contain cyanide groups, and weak interactions between cyanide groups can be formed, such as van der Waals forces and dipole-dipole interactions, which determine its melting and boiling point.
Third, in terms of solubility, tetracyanoethylene is slightly soluble in water, but soluble in a variety of organic solvents, such as dichloromethane, chloroform, etc. This is because it is a non-polar or weakly polar molecule. According to the principle of "similar miscibility", water is a polar solvent, and its polarity is very different from it, so it is difficult to dissolve; organic solvents are mostly non-polar or weakly polar, and their polarity is similar, so they are soluble.
Fourth, in terms of electrical properties, tetracyanoethylene shows a certain electron affinity and can be used as an electron receptor. The cyanide group in its molecular structure is a strong electron-absorbing group, which makes the molecular electron cloud density uneven and has a tendency to accept electrons. This property makes it attractive in the fields of organic semiconductors, charge transfer complexes, etc., and has potential applications in organic electronic devices.
Fifth, in terms of optical properties, tetracyanoethylene will absorb and emit under the irradiation of specific wavelengths of light due to the electron conjugation system in molecules, which is of research value in the fields of photophysics and photochemistry, or can be used in the direction of photoluminescent materials.

Carbon tetrachloride is a colorless and clear heavy liquid with a special odor and unique chemical properties, which are generally as follows:
First, carbon tetrachloride is chemically stable. Under normal temperature and pressure, it is not easy to react with many substances. Because the covalent bond between carbon and chlorine is quite strong, it requires high energy to break it. In case of ordinary acid and alkali, carbon tetrachloride can remain stable and does not react easily with it. "Tiangong Kaiwu" said: "Things have their own properties, stable and difficult to change." Carbon tetrachloride is exactly this property, and in common chemical environments, it is multi-potent and safe.
Second, carbon tetrachloride is flame retardant. Because it cannot burn by itself and has a density greater than air, it can cover the surface of the burning material and isolate the air, thus achieving the effect of fire suppression. This characteristic has made it widely used in fire extinguishers. The ancients said: "Water and fire are resistant to each other, blocking its source and extinguishing the fire." Carbon tetrachloride, with its flame retardant properties, prevents the air required for combustion, just like the ancients who controlled water, blocked its flow and caused water to stop.
Third, carbon tetrachloride is a good organic solvent. It can dissolve many organic compounds, such as oils, resins, etc. Because the molecular structure of carbon tetrachloride is tetrahedral, it is a non-polar molecule. According to the principle of "similar compatibility", it can be miscible with non-polar or weakly polar organic molecules. "Tiangong Kaiwu" often says that the compatibility of matter, the compatibility of carbon tetrachloride and organic solutes, is also a manifestation of the suitability of matter.
Fourth, carbon tetrachloride can decompose at high temperatures or in contact with certain catalysts. The decomposition products may contain toxic phosgene and other substances, which are their potential hazards. The ancients also knew that things must be reversed. Carbon tetrachloride is stable under normal conditions, but if conditions change, it will also cause changes and decompose harmful things.

The common preparation methods of tetraammonium copper ions are described in the classical Chinese genre of "Tiangong Kaiwu" as follows:
To make tetraammonium copper ions, one method can be to mix copper hydroxide with ammonia water. First take a copper-containing salt, such as copper sulfate, and dissolve it in water to obtain a blue liquid. When an alkali solution, such as sodium hydroxide, is dripped into it, a blue flocculent copper hydroxide precipitate is formed. The text says: "Take the copper salt and dissolve it in water to form a clear liquid, and then add an alkali agent to drip in, to obtain a precipitate of copper hydroxide, which is blue and flocculent."
Then, precipitate the copper hydroxide and slowly add ammonia. It can be seen that the precipitation gradually dissolves, and finally a dark blue solution is obtained, which is a solution containing tetraammonia copper ions. Because of the reaction between copper hydroxide and ammonia water, the copper ions of copper hydroxide combine with ammonia molecules to form tetraammonia copper ions. As recorded in the text: "The ammonia water is gradually injected into the copper hydroxide precipitation, and when the precipitation fades away, the solution turns to dark blue, and this solution contains tetraammonia copper ions."
Another method is to directly react with excess ammonia with a copper salt solution. Slowly pour the copper sulfate solution into the concentrated ammonia water, and stir while pouring. At first, there was a light blue precipitate, which was basic copper sulfate. However, due to excess ammonia, the precipitate quickly dissolved, and a dark blue solution containing copper tetraammonium ions was obtained. Remember: "Slow down the solution of copper salt into the concentrated ammonia water, stir it, and the initial light blue precipitate appeared, which was basic copper sulfate. Due to excess ammonia, the precipitate was instant, and then a dark blue liquid was obtained, containing copper tetraammonium ions."

Tetrafuran is soluble, and it needs to be kept in mind during the use process.
First, fire prevention is very important. Tetrafuran is flammable, and its evaporation can form explosive mixtures in the air. In case of open fire and high temperature, it can cause an explosion. Therefore, the use of all sources must be a fire source and a fire source, and it is equipped with a suitable fire equipment, such as dry powder firearms, carbon dioxide firearms, etc. Operating conditions, no suction, all equipment has explosion-proof function.
Second, pay attention to the flow. Tetrafuran is toxic. If its evaporation gathers in the air, it will not add fire and explosion, and it will also be harmful to people's health. There is good communication in all uses, such as exhaust fans, etc., to ensure air circulation and reduce the degree of evaporation.
Third, avoid oxidation. When tetrafuran is oxidized, it may cause strong reactions and even explode. Use it in storage, and store it in different oxidation zones. Do not mix and mix.
Fourth, please note personal anti-pollution. When operating tetrafuran, it is advisable to wear anti-oxidation clothing, gloves and eyes. If you accidentally connect the skin, you should immediately wash it with a large amount of running water; if you contact the eyes, you need to wash it with a large amount of water quickly.
Fifth, store it properly. Tetrafuran should be stored in a room where there is no room, no fire, and no source. It should not exceed 30 ° C. Keep the container sealed. If there are any leaks, emergency management and containment materials.
If tetrafuran is used, it is necessary to follow the relevant safety procedures and remain vigilant at all times to ensure the safety of operation.