5-bromo-1-benzothiophene-2-carbonitrile

"Tiangong Kaiwu" says: "It is the grain that eats the five grains, and the rice is the seventh, and the so-called millet is also called. Hemp, Shu, wheat, millet, and millet are the forerunners of the five grains, and hemp is the first." Hemp, that is, hemp, its seeds are edible, and it was one of the important food crops in ancient times. And hemp, its main uses are quite many.
One of them can be used as food. In ancient times, the yield of grains was limited, and hemp, as an easily accessible food source, provided the people with food needs. At that time, the productivity was low, and hemp had strong growth adaptability. It could survive in a variety of environments, and the hemp produced was an important food for people to survive. In times of famine, food is in short supply, and pockmarked seeds become the key material to save the famine, saving countless lives.
Second, it is used for oil extraction. Pockmarked seeds are rich in oil, and pockmarked oil can be obtained by extraction. This oil was widely used in ancient times, not only for cooking oil, adding food flavor; but also for lighting, lighting up life at night. In the era of scarcity of lighting tools, the dim light ignited by pockmarked oil brought convenience and warmth to people in the long night.
Third, medicinal value. In the field of traditional medicine, pockmarked seeds have the functions of moisturizing dryness and smoothing the intestines, nourishing and nourishing deficiency. According to the records of traditional Chinese medicine, they can be used to treat diseases such as intestinal dryness and constipation, relieving the pain and suffering of many patients. Doctors carefully prepare prescriptions for patients based on the characteristics of Ash seeds and match them with other medicinal materials to help the body recover.
Fourth, it can be used as feed. Ash seeds are rich in nutrients and can be used to feed livestock, which can promote livestock growth, enhance physical fitness, improve meat quality, ensure the stable development of animal husbandry, and provide people with more high-quality meat, milk and other animal husbandry products.

The synthesis of carboxymethyl ether, although it has been inconclusive in the past, is inferred by today's knowledge, and there may be various ways.
First, it can be prepared from alcohols. Alcohol, a genus of organic compounds, whose molecules have hydroxyl groups. If the alcohol is heated under specific conditions, such as sulfuric acid as a catalyst, the two alcohol molecules can remove a molecule of water to form an ether. Taking ethanol as an example, at an appropriate temperature and under the catalysis of sulfuric acid, two molecules of ethanol can form a molecule of ethyl ether and a molecule of water. The reason for this reaction is that the hydroxyl group of one ethanol molecule is combined with the hydrogen on the carbon atom connected to the hydroxyl group of another ethanol molecule to form water, and the rest are connected to form an ether bond. If methanol is used as a raw material, methyl ether can also be prepared by this method, that is, two molecules of methanol are catalyzed by sulfuric acid and heated to remove a molecule of water to form methyl ether.
The second, or can be obtained by the reaction of halogenated hydrocarbons with sodium alcohols. In the case of halogenated hydrocarbons, the hydrogen atom in the hydrocarbon molecule is replaced by a halogen atom. Sodium alcohols are produced by the reaction of alcohols with sodium metal. When halogenated methane meets sodium methoxide, the halogen atom combines with sodium alkoxide to form sodium halide, and the rest is connected to form methyl ether. This reaction is a kind of nucleophilic substitution. The carbon atom of halogenated methane is partially positively charged, and the oxygen atom of sodium alcohol has a lone pair of electrons, which is nucleophilic. The two phases interact to obtain methyl
Third, there are also those who use carbon monoxide and hydrogen as raw materials. Under specific catalyst and temperature and pressure conditions, carbon monoxide and hydrogen can react. First, the synthesis gas is used to produce methanol, and then the methanol is dehydrated to obtain methyl ether. This process is quite complex, requiring precise temperature control, pressure control and selection of the appropriate catalyst, which is an important way for the synthesis of methyl ether.
The above methods for synthesizing methyl ether, although unprecedented in ancient times, can be deduced with today's chemical principles and knowledge, or will be helpful for later research and production of methyl ether.

Argon is a colorless and odorless inert gas. Its physical properties are unique and worth exploring.
First of all, its state of matter. At room temperature and pressure, argon is in a gaseous state, with weak intermolecular forces, so it can move freely and fill the space it is placed in. However, if the temperature is applied to an extremely low temperature, about -185.7 ° C, argon can condense into a colorless liquid. At this time, the molecular spacing is reduced and the range of motion is limited. If the temperature drops to -189.2 ° C, argon will solidify into a snow-like solid, with molecules arranged in an orderly manner and little ability to move.
Times and density. Argon has a density greater than air, about 1.784g/L, and the density of air is about 1.293g/L. This property makes it behave differently in a specific environment. For example, in a closed space, argon tends to sink and accumulate.
Furthermore, it is related to solubility. Argon is slightly soluble in water. Under normal temperature and pressure, only about 33.6 ml of argon can be dissolved per liter of water. This solubility difference is important in the separation, purification and other process operations of many substances.
The boiling point and melting point of the compound. The boiling point is -185.7 ° C, the melting point is -189.2 ° C. This low-temperature phase transition temperature is widely used in the industrial field. For example, in low-temperature freezing technology, the liquefaction and solidification process of argon can provide a stable low-temperature environment.
In addition, argon has poor thermal conductivity and low thermal conductivity. In some scenarios that require thermal insulation, the use of argon's characteristics can effectively prevent heat transfer and achieve the purpose of thermal insulation.
In summary, argon has various physical properties and plays an indispensable role in industry, scientific research, life and many other aspects. The world should recognize it in detail and make good use of its properties to promote scientific and technological progress and improve life.

Methyl ether is an organic compound with many chemical properties.
Methyl ether is flammable and can burn smoothly in the air to generate carbon dioxide and water. This reaction is quite violent and will release a lot of heat, just like the "Tiangong Kaiwu" said that many flammable things will ignite in an open flame and turn into light heat. The chemical equation for its combustion is: $CH_3OCH_3 + 3O_2\ stackrel {ignited }{=\!=\!=} 2CO_2 + 3H_2O $.
Methyl ether also has certain solubility. It is miscible with some organic solvents such as ethanol and ether, and under certain conditions, it can also be slightly soluble in water. This solubility is just like the dispersion and fusion of certain substances in a specific liquid mentioned in the book, forming a uniform and stable system.
From the perspective of chemical reactivity, methyl ether is relatively stable, but under certain conditions, such as high temperature and the presence of catalysts, it can participate in some reactions. For example, when reacting with hydrogen halide, halogenated alkanes and alcohols can be formed. Take the reaction with hydrogen chloride as an example to form chloromethane and methanol. This process seems to be under a specific opportunity, the structure of the substance changes and new substances are derived.
In addition, methyl ether also exhibits a certain degree of weak alkalinity. It can react with strong acids to form salt compounds. This is as if in the interaction of acid and base, methyl ether participates in it by virtue of its own characteristics to form a new chemical relationship. The chemical properties of methyl ether are rich and diverse, and they exhibit different reaction characteristics under different conditions, such as combustion and heat, dissolution in other substances, or participation in reactions to generate new substances. These characteristics make it useful in many fields.

In today's world, in the market, the price of rice poppy is related to people's livelihood, and everyone is concerned about it. As for the price of rice poppy in the market, this is a complicated matter and is influenced by various factors.
The change of time and time is one of them. When the year is rich, when the rain is on, the crops in the fields are lush and the harvest is abundant, the output of rice poppy will increase, and the supply in the market will be abundant. The price may stabilize or even fall. On the contrary, if the drought is plagued, the flood becomes a disaster, the fields are damaged, the harvest will drop sharply, and the supply of rice poppy in the market will be in short supply.
The difference in geographical location also has an impact. In different places, the soil is fertile and barren, and the climate is warm and cool, and the quality and quantity of rice poppy produced are different. It is produced in fertile plaster and suitable climate, and the yield is both high and the quality is excellent, or it can be obtained at a slightly higher price in the market. In remote places, traffic is blocked and transportation is difficult. When rice poppy enters the market, its price may increase due to freight and so on.
Human measures should not be ignored. The government's decrees are related to the taxation, storage, and circulation of rice poppy. If the government practices light taxation, encourages merchants to traffic, stores reasonably, and buys it in a timely manner to help supply and demand, the price of rice poppy may be stable. If the government order is improper, the tax is heavy, or the profiteers hoard and drive up the price, the price of rice millet will be disordered.
Therefore, the price of rice millet in the market cannot be generalized. In a good year, the price of a bucket of rice is only a few dozen dollars; but in a famine, the price of a bucket of rice may be hundreds of dollars, or even a thousand dollars. The price in the market changes rapidly, and it needs to be viewed based on factors such as time of day, location, and human beings to know its approximation. The world should pay attention to all kinds of situations, so as to respond to changes in the price of rice millet and make a stable livelihood.