In the field of agriculture, it is the key to irrigation. Between fields, it is relied on to divert water to dissolve drought, so that the harvest is moist, and the grain can flourish and grow. This is a matter of food and grain for people's livelihood. And in transportation, it is also useful. Small boats can be used on it, carrying goods to and from each side, and promoting commerce.
As for 5-huangrui, its nature is many and moist, and it is quite useful in medicine. It can be used in medicine to treat various diseases, or regulate qi and blood, or relieve pain, which is important for doctors. And because of its unique appearance, it is also useful in the way of decoration, which can add its splendor to utensils and costumes, and enhance its exquisite beauty. In the construction of gardens, it can also be planted to increase the charm of the scenery, so that in the confines of the garden, there are more spiritual and natural interests.
Furthermore, the two also have profound cultural implications. 3-< r > is often chanted by the ink poets, which contains praise and feelings for the feelings of the countryside and the work of water conservancy. 5-< r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > < r > <

3-Bromo-5-chlorobenzaldehyde is an organic compound with unique physical properties. It is in a solid state at room temperature, and the molecules are arranged into a solid structure in an orderly manner due to intermolecular forces. The melting point is about 64-66 ° C. When heated to this temperature range, it melts from a solid state to a liquid state.
This substance is insoluble in water, because its molecules are non-polar or weakly polar, and water is a polar molecule. According to the principle of "similar miscibility", the polarity of the two is very different, so it is insoluble. However, it is soluble in some organic solvents, such as ethanol, ether, dichloromethane, etc. Organic solvents such as ethanol and 3-bromo-5-chlorobenzaldehyde molecules can form interactions such as van der Waals forces, which help them disperse and dissolve.
3-Bromo-5-chlorobenzaldehyde is volatile to a certain extent and will evaporate slowly in the air. Its odor is special, although it is difficult to describe accurately, it is irritating to a certain extent, and it may feel uncomfortable when smelling. This odor is caused by the evaporation of molecules into the air, which stimulates olfactory receptors.
In addition, the compound has a certain density, which is higher than that of common organic solvents such as benzene and toluene. This shows that under the same volume, the mass of 3-bromo-5-chlorobenzaldehyde is larger. Due to the large relative atomic weight of bromine and chlorine atoms in the molecule, the overall molecular weight increases, which in turn leads to an increase in density.

3-%E6%B0%9F-5-%E6%BA%B4%E6%B0%AF%E8%8B%AF, its chemical properties are stable. Looking at the ancient books, the properties of this substance have rarely changed over time.
In terms of its structure, its intermolecular bonding force is strong and the structure is dense. Like the beams and columns of a vast building, they support each other and are stable but not inclined. Such a structure makes it difficult to be broken by ordinary external forces, and it is difficult to easily combine with others.
And in the environment, common acids and alkalis are also difficult to play a significant role in it. The corrosion force of acid and the chemical properties of alkali are like a breeze blowing the mountain in 3-%E6%B0%9F-5-%E6%BA%B4%E6%B0%AF%E8%8B%AF, without hurting its original.
Furthermore, when heated, this substance can also preserve its properties. Under high temperature, although there may be deformation, the internal quality remains unchanged, unlike all easy things, which melt when heated and burn when exposed to fire.
The ancients said: "Solid as a rock." The transformation of 3-%E6%B0%9F-5-%E6%BA%B4%E6%B0%AF%E8%8B%AF is just like the strength of a rock. In various chemical reactions, its quality is always maintained, so it can be known that its transformation is stable.

To prepare 3-alkyne-5-bromobromobenzene, there are various methods, each with its own advantages and disadvantages, which need to be selected according to the actual situation.
One is the nucleophilic substitution method. First, the halogenated hydrocarbons containing alkynyl groups are taken, and the nucleophilic substitution reaction is carried out with the phenyne derivatives under suitable catalysts and reaction conditions. This process requires fine regulation of the reaction temperature, catalyst type and dosage, and the activity of the phenyne derivatives used is quite high, the preparation is not easy, and the reaction operation is demanding. However, its advantages are good selectivity and high product purity.
The second is the halogenation-alkynylation tandem method. First, benzene was used as the starting material, and bromine atoms were introduced through halogenation to obtain bromobenzene derivatives. Subsequently, the metal-catalyzed alkynylation reaction was used to react the bromobenzene derivatives with alkynylation reagents to construct the structure of 3-alkyne-5-bromobenzene. This route is easy to obtain raw materials and relatively simple to operate. However, in the halogenation step, attention should be paid to regioselectivity to prevent the formation of unnecessary isomers. During the alkynylation reaction, the selection of metal catalysts and the optimization of reaction conditions are crucial, which are related to the yield and selectivity of the reaction.
There is also a cross-coupling method between alkynes and halogenated aromatics. With suitable alkynes and halogenated aromatics as substrates, cross-coupling occurs under transition metal catalysis. This method requires the use of high-efficiency transition metal catalysts and ligands to promote the reaction. The advantage is that the mature cross-coupling reaction system can be used, and the reaction conditions are relatively mild. However, the choice of substrates may be limited, and the cost of catalysts may be high, which affects the economy of large-scale preparation.

3-5 grooves of nitrate are stored in the warehouse, and it is advisable to pay attention to the general situation.
Where it is stored, it is determined by the first weight. It is a place where things are dry, clear and clear. Nitrate is easy to be damp, and the moisture is easily soluble, resulting in a certain amount. If it is placed in a tidal place, it is not easy to be damaged, and it may be biochemically reversed, and its effectiveness is improved. Good pass, can avoid accumulation and avoid the risk of danger. It can be controlled and prevented from being caused by high temperature.
Furthermore, the containers that are stored cannot be ignored. It is advisable to use dense devices, such as plastic barrels and barrels, to prevent external factors from invading. The barrel body is in good condition, cracking and holes, so as to prevent the leakage of nitrate. And the equipment is compatible with nitrate, and it is not necessary to cause and reverse the process.
It is necessary to fix it properly. Because of the solid material, if it is not fixed on the way, it will shake or collide, or cause the container to break, and the nitrate will be scattered. The road is bumpy and urgent, which may cause the unfixed object to shift and fall.
In addition, the environment is also important. Avoid high and tidal environments. In summer, if it is exposed to the hot sun, the temperature will rise, and the shadow will be nitrate-prone. In case of rain, it should be protected from rain, and a tarp can be covered.
People also know about it. Familiar with the characteristics of nitrate, in case of sudden damage, such as container breakage or leakage, it can be properly handled and operated in a safe manner to ensure the safety of the product. In this way, the storage of nitrate in 3-5 grooves can be comprehensive, less loss, and avoid safety hazards.