3-pyridinecarboxaldehyde, 6-fluoro-

3% - What do you use for your armor?
3% - What do you use for your armor?
Husband 3% - Take your armor for your armor, this is the material used in ancient times. The armor is made of water, its color is hard, the color is blue and gray, and the nature is cold. Ancient scholars, take their armor for their cold, and use it for their armor and their armor, and they are evil ghosts. In the past, when the people encountered evil, the house was not broken, and the scholars often took the armor of the armor, ground it into powder, and placed it in the armor, or mixed with water, to ensure safety.
To 6 -, this is the name of the waterway. 6 - The water that is not the same as the water is also the connection between rivers and lakes. Its use is used to irrigate the fields, nourish the food, and is the foundation of people's livelihood. The ancient ancestors lived according to the water, and diverted the water to irrigate the fields, so that the five were able to ascend. And the water can be passed through boats, which is convenient for commerce. The goods from the north and the south can be circulated by means of water. In addition, the water has hidden many sources, and the food of the people is the food of the people; the sand and gravel can be used to build houses in the city.
However, 3% - to be used in many ways, for the common people's livelihood, involving less; and 6 - to be used in the lives of the people, the foundation of the people, the people's dependence. Since ancient times, water management has been important in all generations, because of its people's livelihood.

6 - Water is a kind of water, and its physical properties are quite characteristic. The flow of water is slow or urgent, depending on the height of the terrain. At its slow flow, the water waves are not active, like the flat of a mirror, clear to see, the sand, stones and fish at the bottom of the water are all vivid in my eyes; at its rapid flow, the waves are turbulent, and the sound is like thunder, unstoppable.
As far as its temperature is concerned, it varies from time to time. In summer, the sun is abundant, the water temperature is slightly higher, and it is warm to touch; in winter, the weather is cold, the water temperature drops sharply, the tentacles are cold, and even the frozen river surface, the ice layer is thick, and it is feasible for people to walk.
Furthermore, the density of water is also considerable. Water or contains various minerals, sediment and other substances, causing its density to be different. When the content of sediment in water increases, its density increases, and the buoyancy of floating objects in it also changes. And the water is soluble, soluble in some salts, gases, etc. If an appropriate amount of oxygen is dissolved, aquatic organisms can survive and multiply; dissolving salts affects the taste and properties of water.
And its viscosity cannot be underestimated. In different environments, the viscosity may change. When water flows through narrow places or encounters obstacles, the role of viscosity will become prominent, or change the shape of water flow, or affect the movement of objects in the water.
In addition, the color of the water is often clear and clear. When there is a rainstorm, the mud and sand will fall, and the water will turn yellow. This is all caused by the entrapment of sediment by the water flow. Looking at its transparency, in calm and undisturbed places, the transparency is high; while in places with rapid water flow and many sundries, the transparency is low.
The physical properties of the water have a great impact on life and production. Farmers use irrigation and artisans use it to build. The advantages and disadvantages of its nature are all valued by the world. It is time to observe it carefully and make good use of it.

The chemical properties of the horseshoe are different.
The horseshoe horseshoe horseshoe horseshoe horseshoe is a spiritual substance in the sea. Its shell is firm and thick, and it has a brown-black color, which is hard to defend against the enemy. The blood of horseshoe horseshoe horseshoe is blue-green in color, because it is rich in copper ions. Its blood coagulates when it encounters bacteria, and can be used to produce bacteria-testing agents. It has made great contributions to the industry of medicine. And the meat of horseshoe horseshoe is delicious, but its growth is slow and it is difficult to reproduce, so it needs to be protected against excessive fishing.
As for the water, it is a natural flow. The chemical properties of water are related to many factors. The water contains various minerals, such as calcium, magnesium, iron, etc., which are dissolved in different proportions, which affect the hardness of the water. If there are many calcium and magnesium ions, the water will be hard, and the boiling water will be prone to scale; if there are less, the water will be soft. And the water may contain trace amounts of acid ions, such as carbonate, sulfate, etc., which are related to the pH of the water. Normal water should be weakly alkaline, which is beneficial to the survival of aquatic organisms. And there is dissolved oxygen in the water, which is the basis for the respiration of aquatic organisms. If industrial wastewater and domestic sewage enter the water, the chemical properties will change, the oxygen content will decrease, and harmful substances will increase. Aquatic organisms will be endangered, and the surrounding ecology will also be harmed. It is the most important thing to protect the purity of the water and keep its chemical properties stable.

To prepare a mixture of 3-pentyne and 6-heptene, the method is as follows:
First take the appropriate raw materials and start with the related reaction of alkynes. If 1-pentyne can be selected as the starting material, 1-pentyne has an active triple bond and can be added to a specific reagent. To convert it to 3-pentyne, the reaction of alkynes with sodium metal and haloalkanes can be used. First, 1-pentyne reacts with sodium metal in liquid ammonia. This reaction can sodium the triple bond of alkynes to form a sodium alkyne intermediate. Sodium alkyne is strongly nucleophilic, and a suitable halogenated alkane such as bromoethane is added at this time. The negative ion part of sodium alkyne will attack the carbon atom of bromoethane, and the bromine ion will leave at the same time, and a nucleophilic substitution reaction will occur, so 3-pentyne can be successfully prepared.
As for the preparation of 6-heptene, suitable olefin raw materials can be selected. For example, taking 1-heptene as an example, the double bond properties of olefins can be used to react. 1-heptene can be added to a specific reagent to adjust the position of the double bond. If a borohydrogenation-oxidation reaction is used, 1-heptene first undergoes a borohydrogenation reaction with diborane. The boron atom in the diborane will be connected to the carbon atom at one end of the double bond, and the hydrogen atom will be connected to Then, under the action of hydrogen peroxide and sodium hydroxide solution, an oxidation reaction occurs, and the boron atom is replaced by the hydroxyl group to obtain the corresponding alcohol. If it needs to be further converted into 6-heptene, the generated alcohol can be eliminated. An appropriate dehydrating agent, such as concentrated sulfuric acid, can be selected and heated to dehydrate the alcohol hydroxyl group and the hydrogen atom on the adjacent carbon atom to form a double bond, thereby obtaining 6-heptene.
By preparing 3-pentyne and 6-heptene respectively, and then mixing the two in an appropriate ratio, the desired mixture can be obtained. During the preparation process, the reaction conditions, including temperature, reagent dosage and reaction time, need to be precisely controlled to ensure the purity and yield of the product, so as to successfully achieve the goal of preparing the mixture of 3-pentyne and 6-heptene.

In the field of mulberry cultivation, the 3-year-old likes to be warm and lives in the water. Its movement is agile, and it is often eaten by small plants and aquatic plants. The manure in the field can be used to nourish crops and make them harvest. In 6-year-old places, the water source is abundant, which is conducive to irrigation, the planting of rice, or the cultivation of mulberry. The water in the water can also be used for the common people to eat, fill their appetite, and can be easily used in the city to increase their family.
In the way of cultivation, the armor, meat, and blood can all enter. A can calm the liver and disperse it, and it has an effect on diseases such as dizziness and anger. The meat can clear the body, and it can manage the disease of the body. The blood can be used to activate the body and treat some diseases that are blocked by the blood. And the grass that is born in 6%, or the detoxification of the body, or the blood, is a good material for treating diseases and saving people, and saving the suffering of the people.
As for the prevention of problems, 3% of the land is high, so it is easy to watch and observe, and it can be used as a checkpoint. The hardness of the A is hard, and the ancients may borrow its shape and imitate it, so as to improve the quality of the A and the quality of the people. 6-In addition, in the field of culture, the shape of the armor is often used in sculptures and sculptures, which contains the meaning of auspiciousness and auspiciousness, indicating that people are going to live a good life. 6-The scenery of the sea is vast, and it is difficult to get the scholars to sing and write, leaving a lot of good articles, which is rich in culture.