What are the physical properties of 1,1 '-biphenyl, 2-iodine-
1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-%E7%A2%98-%E7%9A%84%E7%89%A9%E7%90%86%E6%80%A7%E8%B4%A8%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%9F%E6%98%AF%E5%9C%A8%E8%AF%A21%2C1 '-Binaphthalene, 2-carboxyl group. 1,1' -Binaphthalene-2-carboxylic acid, its physical properties are as follows:
- ** Appearance and Properties **: Usually white to light yellow crystalline powder. This form is easy to identify and distinguish, and its appearance can be used as a preliminary basis for judging purity and quality in many chemical reactions and industrial applications.
- ** Melting point **: The substance has a high melting point, about 212-216 ° C. Melting point is an important physical constant of the substance, and accurate determination of it helps to identify the compound and determine its purity. In organic synthesis, melting point determination can determine whether the reaction product is the target substance.
- ** Solubility **: 1,1 '-binaphthalene-2-carboxylic acid is slightly soluble in water. This property is related to the hydrophobic naphthalene ring contained in its molecular structure, which makes it difficult to dissolve in a polar water molecular environment. However, it is soluble in some organic solvents, such as dichloromethane, chloroform, N, N-dimethylformamide (DMF), etc. In the organic synthesis reaction, selecting a suitable organic solvent to dissolve the substance will help the reaction proceed smoothly. For example, in the esterification reaction with 1,1' -binaphthalene-2-carboxylic acid as the raw material, dichloromethane can be selected as the reaction solvent to provide a homogeneous environment for the reaction.
- ** Density **: Its density is relatively large, and the specific value will vary slightly depending on the measurement conditions. Density data is of great significance in the separation, storage and transportation of substances. During storage, knowing its density helps to arrange storage space rationally. When transporting, combine density and other physical properties to choose appropriate packaging and transportation methods.
What are the chemical properties of 1,1 '-biphenyl, 2-iodine-
1,1 '-Binaphthalene, 2-carboxyl, is one of the organic compounds. It has many unique chemical properties.
This compound has chiral characteristics, which are of great significance in many chemical reactions and biological activities. Due to its chiral structure, it can be used as a chiral ligand or catalyst in asymmetric synthesis to help obtain products with specific configurations. It is widely used in drug synthesis, total synthesis of natural products, etc. The presence of
2-carboxyl groups makes the compound acidic. Carboxyl groups can participate in many chemical reactions, such as neutralization with bases to generate corresponding carboxylate. It can also be esterified with alcohols to form ester compounds, which is an important reaction path for building complex molecular structures in organic synthesis.
In addition, the conjugated structure of 1,1 '-binaphthyl-2-carboxyl gives it certain optical properties. Under the irradiation of specific wavelengths of light, it may exhibit optical phenomena such as fluorescence, which shows potential application value in optoelectronic devices, fluorescent probes and other fields. Moreover, the conjugate system also affects the electron cloud distribution and stability of molecules, and plays a role in their chemical reaction activity and selectivity.
Furthermore, its physical properties such as solubility vary in different solvents due to the structure of carboxyl and binaphthyl. In polar solvents, the hydrophilicity of the carboxyl group may cause it to have a certain solubility; while the hydrophobic part of the binaphthalene restricts the overall solubility. This property is crucial in the separation, purification and solvent selection of compounds in practical applications.
What are the main uses of 1,1 '-biphenyl, 2-iodine
1,1 '-Binaphthalene, 2-carboxyl group, its main use is wide. In the genus of "Tiangong Kaiwu", although this thing is not directly described, it can be used in the view of ancient chemical and pharmaceutical things.
First, in the way of pharmaceuticals, it may be a key intermediate. Ancient pharmaceuticals, the extraction and combination of heavy medicinal materials. 1,1' -binaphthalene-2-carboxyl group has a unique chemical structure, which can guide the synthesis of specific molecular structures in reactions to make good medicines for symptoms. Like ancient physicians, if they want to regulate qi and blood and relieve pain, they often need exquisite medicinal introductions and compound agents. This compound may be the basis for building complex drug molecules, helping physicians to benefit the world.
Second, in the dye industry, there is also potential. Ancient dyeing, seeking fresh and lasting color. 1,1 '-binaphthalene-2-carboxyl group can be chemically modified appropriately to endow the dye with unique stability and affinity. Make things dyed in silk and hemp, and the color will not fade over the years, adding color to clothing and fabrics, and honoring the ancient people's pursuit of beauty and exquisite craftsmanship.
Third, in the field of catalysis, it also has potential. Ancient metallurgy, brewing and other processes relied on catalysis to promote reaction and improve efficiency. 1,1 '-Binaphthalene-2-carboxyl group can be used as a unique catalyst to lower the barrier of reaction in specific chemical reactions, accelerate the conversion of substances, assist in its purification in metal smelting, and adjust its flavor in wine brewing, which adds to the industrial and agricultural industries.
What are the preparation methods of 1,1 '-biphenyl, 2-iodine-
1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-%E7%A2%98-%E7%9A%84%E5%88%B6%E5%A4%87%E6%96%B9%E6%B3%95%E5%85%B7%E4%BD%93%E5%A6%82%E4%B8%8B%EF%BC%9A
1. Choose the best anise
material, the stem is straight and the leaves are green. It is also necessary to prepare pure Baijiu, the alcohol degree is moderate, about 60 degrees up and down is appropriate.
2. Prepare
Wash the anise, remove its impurities, and drain the water. Then, cut the anise into sections, the length is uniform, about an inch is better.
3. Soak
Take a clean porcelain jar and dry the moisture in the jar over fire. Put the sliced anise into the jar, slowly inject Baijiu, and the wine needs to be soaked in the anise. Seal the mouth of the jar, cover it with several layers of hemp paper, and tie it tightly with thin ropes to ensure that no air penetrates.
4. Storage
Place the sealed porcelain jar in a cool and dry place away from direct sunlight. Every few days, gently shake the porcelain jar to fully blend the anise and the wine. After about a month, when the porcelain jar is opened, the color of the wine can be seen slightly changing, emitting a unique anise celery smell. At this time 1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-% E7% A2% 98 has been formed. However, if you want to make it taste better, you can store it for several months before you can get a mellow product. In this way, 1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-%E7%A2%98-%E7%9A%84%E5%88%B6%E5%A4%87%E6%96%B9%E6%B3%95.
1,1 '-biphenyl, 2-iodine-what are the precautions during use
1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-% E7% A2% 98, it is also the one who makes things have two shapes. When using it, when you pay attention to everything, you can do your best and be safe.
First, review its quality. 1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-% E7% A2% 98 The material must be strong and pure, without the risk of flaws and damage. If the quality is at a loss, it will be easy to break, and it will fail to work. Therefore, before taking it, you must carefully observe its quality to ensure that it is solid and usable.
Second, observe its shape. This thing with two shapes must be well integrated. The connection of the two shapes should be close together, without deviation and perverse state. If the shape is not correct, the operation will be difficult, and errors will easily occur, resulting in things that do not meet expectations. Therefore, the shape must be carefully reviewed before use, so that it fits the rules of the use.
Third, understand its use. 1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-% E7% A2% 98 All shapes have their uses, and they must understand the difference in their functions. When to use this shape, when to use that shape, when you know. Misuse is twice the result, and even cause damage to the object. Therefore, before using, you must know its use in detail, and choose the shape according to the needs of the thing.
Fourth, be careful in handling. When using this object, the method of handling should be careful. The force is uniform and moderate, and it should not be too violent or too slow. If it is too fierce, it is easy to hurt things, and if it is too slow, it is difficult to make its effect. And when operating, when focusing on the heart, do not slack off negligence, to prevent unexpected changes.
Fifth, protect its storage. After use, it should be properly stored. Place in a dry and clean place to avoid moisture and dust. If it is not protected, it will be easy to rust and damage for a long time, and it will not be usable next time. Therefore, the protection after use is also an important matter.
In short, when 1%2C1%27-%E8%81%94%E8%8B%AF%2C 2-% E7% A2% 98 is used, pay attention to the quality, shape, use, operation and protection of all things, so that this two-shaped thing can exert its growth and become its thing, without worries.
