1 + -ether-2- (diethyl methyl) naphthalene is an organic compound with unique physical properties.
Ether compounds, many have a special odor and high volatility. At room temperature, such substances are often liquid, and the density is generally less than that of water. Its solubility is relatively special, and its solubility in water is limited, but it can be well miscible with many organic solvents. This is due to the structure of ether molecules, which makes it have a certain polar and non-polar regions, so it exhibits such solubility.
As for (diethyl) naphthalene, naphthalene is a thick ring aromatic hydrocarbon with a special aromatic odor. On this basis, the introduction of diethyl methyl has greatly changed its physical properties. In terms of melting point, compared with naphthalene itself, due to the introduction of side chains, the intermolecular force changes, and the melting boiling point may change accordingly. In general, the presence of side chains will change the intermolecular distance, hinder the tight arrangement of molecules, and then affect the melting boiling point.
From the perspective of solubility, (diethylmethyl) naphthalene increases nonpolarity due to the introduction of side chains, and its solubility may increase in nonpolar solvents, while it may further decrease in polar solvents such as water. And due to the change of molecular structure, its density will also be different from that of naphthalene.
In terms of volatility, the presence or decrease of side chains makes it more difficult for molecules to escape from the liquid surface because side chains increase the relative mass and steric resistance of molecules. In general, the physical properties of 1 + -ether-2- (diethylmethyl) naphthalene are determined by the structure of ether bonds and (diethylmethyl) naphthalene in its molecular structure. In practical application and research, these physical properties need to be fully considered.

1 + -Cyanogen-2 - (diethylamino) naphthalene is an organic compound, and its chemical properties are as follows:
Physical properties related
This substance may have a certain melting point and boiling point. At room temperature, or as a solid crystal, due to intermolecular forces and structural characteristics, it has a specific state. Its solubility is different or different, in organic solvents such as ethanol and ether, or has a certain solubility. Due to the principle of similar miscibility, its organic structure is compatible with organic solvents; however, in water, due to polar differences, the solubility may be very small.
Chemical properties related
1. ** Cyano reaction **: Cyano is the active group. Hydrolysis reaction can occur. Under acidic or alkaline conditions, the cyanyl group can be gradually converted. When acidic, the cyanyl group is first hydrolyzed to amide, and then further hydrolyzed to carboxylic acid and ammonia ions; when alkaline, carboxylic salts and ammonia are formed. For example, in a strong alkali sodium hydroxide solution, the cyanyl group can react with water and hydroxide ions to obtain carboxylic salts. At the same time, the cyanyl group can participate in the nucleophilic addition reaction, because its carbon atom has a certain positive electricity and is vulnerable to attack by nucleophilic reagents. For example, under the action of alcohols in catalysts, nitrile ether compounds can be formed.
2. ** Diethylamino-related reactions **: Diethylamino groups have the property of electors, which can affect the electron The electron cloud density of the adjacent and para-position of the naphthalene ring increases, and it is more prone to electrophilic substitution reactions. For example, when reacted with bromine water, bromine is more likely to replace the adjacent and para-position hydrogen atoms activated by diethylamino on the naphthalene ring. And the nitrogen atom in the diethylamino group has a lone pair of electrons, which can be combined with protons and is alkaline to a certain extent. It can react with acids to form corresponding salt compounds.
3. ** Naphthalene ring characteristics **: The naphthalene ring is aromatic and relatively stable. However, under certain conditions, reactions such as addition and oxidation can occur. For example, at high temperature, high pressure and in the presence of a catalyst, an addition reaction can occur with hydrogen to partially or fully hydrogenate the naphthalene ring to generate products with different degrees of hydrogen In the oxidation reaction, the strong oxidant can cause the naphthalene ring to break and form oxygen-containing compounds.

1 + - - 2 - (diethyl methyl) ether, which is used in many places. In the field of medicine, it can be used as a solvent to assist in the dissolution of drug components, in order to facilitate the preparation and application of drugs. Because of its specific solubility, it can make insoluble drugs uniformly disperse, improve drug stability and bioavailability.
In chemical synthesis, 1 + - - 2 - (diethyl methyl) ether is often an important intermediate. Through a series of chemical reactions, many organic compounds can be derived from this compound, such as ethers and esters with special structures, which are widely used in the synthesis of fragrances, pesticides and polymer materials.
In the fragrance industry, its unique chemical properties can participate in the fragrance synthesis reaction, giving the fragrance a unique aroma and stability. Some natural fragrances are difficult to extract or expensive, and can be chemically synthesized to simulate natural fragrances or create novel aroma components by borrowing 1 + -2- (diethyl methyl) ether as raw materials.
In the paint and ink industry, 1 + -2- (diethyl methyl) ether can be used as a solvent or diluent. It can adjust the viscosity of paint and ink, make the application or printing process smoother, and help to form a uniform film, improve product quality and appearance.
In addition, in laboratory research, it is also a commonly used reagent for organic synthesis experiments, separation and purification, etc. Because of its stable physical and chemical properties, it is often used as a reaction medium or extractant to help researchers achieve experimental purposes and provide convenience for chemical research. In short, 1 + -2- (diethyl methyl) ether plays a key role in many fields and is of great significance to the development of various industries.

To prepare 1-bromo-2- (diethylamino) benzene, you can follow the following ancient method:
Take benzene as the starting material, blend concentrated sulfuric acid with concentrated nitric acid, and nitrate it at the appropriate temperature to obtain nitrobenzene. This step requires careful temperature control to prevent side reactions from occurring. Cover nitric acid has strong oxidizing properties, and sulfuric acid can promote the reaction process. The two cooperate to replace the hydrogen on the benzene ring with the nitro group.
Next, the nitrobenzene is converted into an amino group with iron powder and hydrochloric acid as a reducing agent to obtain aniline. Iron powder and hydrochloric acid create a reducing atmosphere, and nitro electrons are gradually changed to amino groups. Then, under suitable conditions, the bromine atom selects to replace the hydrogen on the benzene ring to obtain 2-bromoaniline by reacting with aniline and bromine. In this reaction, the amino group is the ortho-para locator, so that the bromine atom mainly enters the ortho-site and the para-site, and 2-bromoaniline can be the main product after regulation.
Then 2-bromoaniline reacts with dimethyl sulfate, and the hydrogen on the amino group is replaced by methyl to obtain N, N-dimethyl-2-bromoaniline. Dimethyl sulfate is a methylating agent with high activity and needs to be handled carefully.
Finally, N, N-dimethyl-2-bromoaniline reacts with sodium ethyl alcohol in ethanol solution, bromine atoms leave, and diethylamino is introduced at the same time, resulting in 1-bromo-2 - (diethylamino) benzene. Sodium ethyl alcohol provides an alkaline environment to promote the reaction, bromine ions are separated, and diethylamino is connected to the corresponding check point. Each step of the reaction requires fine control of temperature, reagent dosage, reaction time, etc., in order to improve the yield and obtain a pure product.

Those who use (diethyl) ether, that is, 1,1-oxa-2- (diethyl) ether, need to pay attention to many things.
First, this ether is volatile and flammable. In the place of use, be sure to keep away from open flames, hot topics and other fire sources. If there is something burning nearby, even if a little spark splashes, this ether will ignite immediately, and the fire will spread in an instant, causing a catastrophe. When storing, it should also be placed in a cool and well-ventilated place. Do not store it in a place with high temperature or direct sunlight to prevent it from evaporating due to rising temperature, increasing the risk of explosion.
Second, it is related to toxicity. Although its toxicity is lower than that of some highly toxic substances, it cannot be ignored. If exposed to this ether vapor environment for a long time, or accidentally inhaled in excess, it will cause damage to the human body. In light cases, it may cause dizziness, nausea, fatigue and other discomfort, and in severe cases, it may involve the nervous system and respiratory system, affecting physical health. When operating, it is necessary to ensure that the ventilation conditions are good. It should be carried out in a fume hood. If the conditions are not available, it should also be operated in an open and well-ventilated place. Wear suitable protective equipment, such as gas masks, to prevent the inhalation of harmful vapors.
Third, pay attention to its chemical properties. This ether can chemically react with certain substances. During use, do not mix with unknown chemicals at will. For example, if it encounters a strong oxidizing agent, it is very likely to cause a violent reaction or even an explosion. Before using it with other chemicals, it is necessary to clarify whether the two will react and operate with caution to prevent accidents.
Fourth, the access and storage links are also exquisite. When taking it, the action should be precise and moderate to avoid spilling and dripping. If it is accidentally spilled, it needs to be cleaned up immediately to prevent it from evaporating in the air, causing the concentration to rise and forming a safety hazard. When storing, choose a suitable container to ensure a good seal to prevent leakage. Labels must be clearly marked, indicating its name, nature, hazards and other key information for easy access and management.