pyridine, 2-bromo-3-chloro-5-fluoro-

Nowadays, there are dihydro, triboron, and pentasilicon, and their chemical structures are particularly important. To clarify the details, we should use the method of "Tiangong Kaiwu" to describe it in ancient words.
The structure formed by dihydro, triboron, and pentasilicon, hydrogen is a light and clear gas, and is often combined into hydrogen molecules in two atomic phases. Boron is rigid and strong in nature, and its atoms are connected in a unique way in the structure. Silicon, a stone-like quality, also has its place in the middle.
When these three are combined, hydrogen atoms may be surrounded by boron and silicon atoms, and are bound by covalent bonds. Boron atoms may be connected by boron-boron bonds to form a certain geometric structure, such as a triangle or a four-sided shape. Silicon atoms are also connected to boron and hydrogen atoms by their valence bonds, so that the overall structure is stable.
Or there is a structure with hydrogen as the end, boron and silicon in the inside, and layers of each other. Boron atoms may form a skeleton, silicon atoms are mixed among them, and hydrogen atoms are attached to the outside of the skeleton. The direction of their valence bonds is based on chemical principles, in order to achieve the lowest energy and the most stable structure.
Or in a chain shape, boron and silicon atoms form chains between each other, and hydrogen atoms are suspended on both sides of the chain. The chains are connected with each other, or there is a weak force, so that the whole is arranged in a regular manner. < Br >
As for its specific shape, its exact chemical structure can only be obtained by experimenting and measuring it with instruments. However, only by the name of this number can we deduce the approximate structure of it.

Mercury, bromine, and iodine are common halogen elements, each with unique physical properties.
Mercury is a liquid at room temperature and is the only liquid metal. Its color is silver-white, with a metallic luster, and its density is quite high, reaching 13.59 g/cm ³. It has good fluidity. The melting point of mercury is -38.87 ° C, the boiling point is 356.6 ° C. It is volatile and can produce mercury vapor at room temperature. This vapor is toxic.
Bromine is a dark reddish-brown smoky liquid at room temperature and pressure, with a strong irritating odor. Density 3.119 g/cm ³, melting point -7.2 ° C, boiling point 58.78 ° C. Bromine is highly volatile, its vapor is reddish-brown, and it is also toxic and corrosive, causing serious irritation to the human respiratory tract and skin.
Iodine is a purple-black solid at room temperature, with a metallic luster. Density 4.93 g/cm ³, melting point 113.5 ° C, boiling point 184.35 ° C. Iodine has sublimation characteristics, and it is easy to directly change from solid to gaseous state when heated, forming purplish-red vapor. Iodine vapor has an irritating odor and has a small solubility in water, but it increases in solubility in iodide solutions such as potassium iodide.
All three have certain toxicity. The toxicity of mercury mainly comes from mercury vapor and mercury ions; the toxicity of bromine lies in its strong corrosiveness and irritation; although iodine is an essential trace element for the human body, excessive intake will also cause harm to the human body. At the same time, mercury, bromine, and iodine have high chemical activity and are easy to react with other substances, making them widely used in chemical, pharmaceutical, analytical chemistry, and other fields.

Alcohol, ether, aldehyde, ketone, carboxylic acid and other organic compounds have their own commonly used applications in organic synthesis.
Alcohol has a wide range of uses. First, it can be used as a solvent, because it can dissolve many organic and inorganic substances. In chemical reactions and production practices, the reactants are fully mixed to improve the reaction efficiency. Second, alcohols can participate in esterification reactions and react with carboxylic acids to form ester compounds. This ester is widely used in flavors, coatings, plastics and other industries. For example, ethyl acetate has a fragrant smell and is often used as a fragrance and solvent. Furthermore, alcohols can undergo oxidation reactions and can be prepared into alaldehyde, ketones or carboxylic acids. For example, ethanol can be oxidized to obtain acetaldehyde, and further oxidized to form acetic acid. < Br >
Ethers are commonly used as organic solvents. Their chemical properties are relatively stable and can dissolve a variety of organic compounds, such as ether. In organic synthesis experiments and industrial production, they are often used for extraction and separation of organic compounds.
Aldoxides are of great significance in organic synthesis. Formaldehyde can undergo addition reactions, such as addition with hydrocyanic acid to form cyanohydrin, which is an important intermediate in organic synthesis. Formaldehyde can also undergo oxidation reactions to form carboxylic acids, or reduction reactions to form alcohols. Formaldehyde, as the simplest formaldehyde, is widely used in the manufacture of phenolic resins, urea-formaldehyde resins, etc., and is indispensable in building materials, furniture and other industries.
Ketones are also versatile. Ketones can be used as excellent solvents to dissolve resins, rubber and other substances. In organic synthesis, ketones can be reduced to form alcohols, and can participate in a variety of condensation reactions, such as variants of hydroxyaldehyde condensation, which can form carbon-carbon bonds for the synthesis of complex organic molecules.
Carboxylic acids also play an important role in the field of organic synthesis. Carboxylic acids can be esterified with alcohols to prepare esters. At the same time, carboxylic acids can be reduced to form alcohols, or converted into derivatives such as acyl halides and acid anhydrides. These derivatives are important intermediates in organic synthesis and are used to construct various complex organic compound structures.

To make dihydrogen, mercury, trihydrogen, bromine, pentahydro, and alkane, the following methods are used:
For dihydrogen production, zinc can be used to react with dilute sulfuric acid. Take an appropriate amount of zinc particles, place them in a Qipu generator, and slowly inject them with dilute sulfuric acid. When zinc meets dilute sulfuric acid, hydrogen gas is generated. This gas escapes from the duct and can be collected by draining and gathering gas. Because the density of hydrogen is less than that of air, it can also be collected by draining down air.
As for mercury, it is often obtained by calcining Dan sand (mercury sulfide). The purified Dan sand is placed in a special ceramic crucible and calcined with strong heat. Salsa is decomposed by heat, sulfur and oxygenation produce sulfur dioxide to escape, and mercury turns into vapor, which condenses when cold, to obtain mercury liquid.
To produce trihydrogen and bromine, hydrogen and bromine can be combined under light or heating conditions. In a special glass reaction vessel, first fill an appropriate amount of hydrogen and bromine gas and seal it. Irradiate with strong light or slowly heat with low fire, the two combine to produce hydrogen bromide. The generated hydrogen bromide can be introduced into water to form a hydrobromic acid solution, and then purified by distillation to obtain pure trihydrogen and bromine.
The preparation of pentahydro and alkane is obtained by a series of reactions from the cracking products of petroleum. Petroleum fractions are taken and cracked at high temperature and under the action of a catalyst to obtain unsaturated hydrocarbons such as ethylene. Ethylene and hydrogen are added in the presence of a catalyst to obtain ethane. Ethane is halogenated and then reduced to obtain pentahydro and alkane. During operation, attention should be paid to the precise control of the reaction conditions. The instruments used must be clean and dry, and the steps must be closely connected, so that the desired product can be obtained.

First, the equipment is very important. To make the equipment, it is necessary to use durable materials. If the wood is good, it is not afraid of water intrusion and corrosion. If you want to make the equipment, you need to use durable materials. The same is true for the equipment in the port. For example, the stone of the port, it needs to be resistant to seawater intrusion, and it needs to be fixed and constant to prevent the tides and waves from breaking.
Second, the placement and layout of the equipment. In the place where the ship is docked and the goods are unloaded, the layout of the equipment needs to be convenient for operation. The berth of the boat is low, and the placement of the equipment is reasonable, so that the goods can be boarded and unloaded without congestion. In the port, the layout of equipment such as navigation and anti-pollution should be considered according to factors such as the topography, current, and direction of the port. For example, the tower must be eye-catching and can lead the ship to enter the port safely.
Third, daily maintenance. Equipment is often used, and it is easy to cause grinding and damage. If there is a problem, it needs to be checked regularly. If there is a problem, grinding and damage, the wooden part of the ship should also be painted and protected. Port equipment such as breakwaters should be checked regularly and repaired and reinforced to ensure the safety of the port.
Fourth, operation. Those who operate the equipment must be familiar with the operation method. Careless operation of the equipment in the canal can easily cause overturning of the equipment and damage to the ship. If the equipment in the port is not operated properly, such as the loss of the navigation equipment, it will endanger the safety of the ship when it leaves the port. Therefore, the operator must be on guard and must not slack off.
Fifth, there is a sudden accident. On the way to the canal, or in case of storms, rain, etc., the equipment needs to be able to be urgent. The port may also be damaged, the sea may be damaged, and the equipment may be damaged. The test can be used to prevent or save the damage, such as urgent lighting, pass equipment, etc.