2% 2C3-dimethylpentane is an organic compound. Its main uses are as follows:
First, as an organic solvent. This substance has suitable solubility and volatility. In the field of organic synthesis, it is often used to dissolve various organic compounds and help the smooth development of chemical reactions. For example, when preparing some fine chemicals, it can act as a reaction medium to fully mix the reactants and improve the reaction rate and yield. In the coatings and inks industry, it can dissolve resins, pigments and other components, so that coatings and inks have good coating performance and drying characteristics.
Second, it is used as a fuel additive. It can optimize the combustion performance of fuels, increase the octane number, and enhance the anti-knock ability of fuels. When added to gasoline, it can make gasoline burn more smoothly in the engine, reduce knock, improve the power and efficiency of the engine, and reduce the emission of exhaust pollutants.
Third, it is a key raw material for organic synthesis. With its unique molecular structure, it can prepare many other organic compounds through a series of chemical reactions, such as substitution reactions, oxidation reactions, addition reactions, etc. Like through specific reactions, it can be converted into compounds with different functional groups for the synthesis of fine chemicals such as drugs, fragrances, rubber additives, etc.
Fourth, it has important applications in the field of analytical chemistry. It can be used as a standard material for gas chromatography analysis, used for calibration of instruments and qualitative and quantitative analysis of other compounds. Due to its stability and high purity, it can provide a reliable reference for analytical results.

2% 2C3-dimethylpentane is an organic compound belonging to the alkane homologue. Its physical properties are as follows:
1. ** Physical state and odor **: Under normal temperature and pressure, it is mostly liquid, with a weak odor characteristic of alkanes. Such odor is often described as a light hydrocarbon odor similar to gasoline.
2. ** Melting boiling point **: The relative molecular weight determines its melting point. Its melting point is about -135 ° C, and the boiling point is about 89-92 ° C. Because alkanes are molecular crystals and are maintained by weak van der Waals forces, the relative molecular weight increases with the increase of carbon atoms, and the Van der Waals force increases, and the melting boiling point increases. The number and structure of carbon atoms of 2% 2C3-dimethylpentane make its melting and boiling point in a specific range.
3. ** Density **: The density is less than that of water, about 0.69 - 0.71g/cm ³. Due to its weak intermolecular force, loose spatial arrangement, and the mass per unit volume is less than that of water, it will float in water.
4. ** Solubility **: It is a non-polar molecule. According to the principle of "similar miscibility", it is difficult to dissolve in polar solvents such as water, but it is easily soluble in non-polar organic solvents such as benzene and carbon tetrachloride.
5. ** Volatile **: It is volatile to a certain extent. Due to the weak intermolecular force, some molecules are prone to obtain enough energy to escape the liquid surface and gradually evaporate at room temperature.
6. ** Conductivity **: There are no freely moving ions or electrons inside, making it a poor conductor of electricity and unable to conduct electricity.

2% 2C3-dimethylpentane is an organic compound, belonging to the homologue of alkanes. Its chemical properties are consistent with many commonalities of alkanes, and its properties are relatively stable. Under specific conditions, several chemical reactions can occur.
In terms of stability, the carbon-carbon single bond and carbon-hydrogen bond in 2% 2C3-dimethylpentane molecule are quite high, which makes its chemical properties stable. Under normal temperature and pressure, it usually does not react with strong acids, strong bases, and strong oxidants. For example, 2% 2C3-dimethylpentane is placed in sodium hydroxide solution or sulfuric acid solution, and there is no significant change.
Substitution reaction is one of the typical reactions of 2% 2C3-dimethylpentane. Under light or high temperature conditions, it can react with halogens (such as chlorine and bromine). Take the reaction with chlorine as an example. When illuminated, chlorine atoms will replace hydrogen atoms in alkane molecules to form chlorinated hydrocarbons. This reaction is carried out in steps, and various products such as monochlorides and dichlorides can be produced. For example, if the reaction conditions are properly controlled, mainly 2-chloro-2% 2C3-dimethylpentane, 3-chloro-2% 2C3-dimethylpentane, etc.
The pyrolysis reaction is also an important reaction of 2% 2C3-dimethylpentane. Under high temperature and no oxygen, the carbon-carbon bond in the molecule of 2% 2C3-dimethylpentane will break, forming small molecules of alkanes, olefins and other compounds. For example, at high temperature it may crack into propylene, butane and other substances. This reaction is used in the petrochemical field to produce basic chemical raw materials.
2% 2C3-dimethylpentane is flammable due to its carbon and hydrogen content. Combustion in sufficient oxygen generates carbon dioxide and water, and releases a large amount of heat energy. The chemical equation for combustion is: $C_7H_ {16} + 11O_2\ stackrel {ignited} {=\! =\! =} 7CO_2 + 8H_2O $. This property makes it usable as fuel.

To prepare 2,3-dimethylpentane, there are three methods.
First, take the elimination reaction of halogenated hydrocarbons and the addition reaction as the diameter. First, take a suitable halogenated hydrocarbon, such as 2-chloro-3-methylpentane, co-heat in a strong alkali alcohol solution, undergo a digestion reaction, and dehalide hydrogen to obtain an ethylene. This ethylene, containing carbon-carbon double bonds, can be added to hydrogen halides. Select specific reaction conditions to add hydrogen halides according to the Markov rule, and add halogen atoms to double-bonded carbons containing less hydrogen to obtain new halogenated hydrocarbons. This halogenated hydrocarbon is combined with a reducing agent such as sodium metal. After the Woods reaction, the hydrocarbon groups of the two halogenated hydrocarbon molecules are connected to form 2,3-dimethylpentane.
Second, through the addition reaction of olefins. Select 3-methyl-1-pentene to react with methyl radical donors, such as iodomethane and initiators (such as peroxides). The peroxide decomposes to produce free radicals, which initiate the splitting of iodomethane into methyl radicals. The double bond addition of methyl radical and 3-methyl-1-pentene generates a new free radical, which can capture hydrogen atoms of other molecules in the system and stabilize, and finally obtain 2,3-dimethylpentane.
Third, alkynes are used as raw materials. First, 3-methyl-1-pentyne is prepared, and this alkyne is partially added to hydrogen under the action of Lindra catalyst to obtain 3-methyl-1-pentene. Then according to the above-mentioned olefin addition method, reacted with suitable reagents, the double-bonded carbon is introduced into the methyl group, and then 2,3-dimethylpentane is obtained.
These three methods have their own advantages and disadvantages. The actual preparation needs to be weighed according to factors such as the availability of raw materials, the difficulty of reaction conditions, and the high yield.

2% 2C3-dimethylpentane is an organic compound. When storing and transporting, be sure to pay attention to the following:
First, fire and explosion-proof. This compound is flammable and can cause combustion and explosion in case of open flame and high heat. In the storage place, fireworks should be strictly prohibited, and corresponding fire protection facilities, such as fire extinguishers, fire sand, etc., should be equipped for emergencies. When transporting, keep away from fire and heat sources, and the vehicle needs to be equipped with a fireproof flower device.
Second, prevent leakage. Because it is a liquid, it is easy to leak and cause environmental pollution and safety hazards. The storage container must be well sealed and regularly checked for damage or leakage. The tank or container of the transportation vehicle should also be ensured to be in good condition. The loading and unloading process should be carefully handled to avoid leakage due to collision and so on. In the unfortunate event of a leak, quickly evacuate the personnel from the contaminated area of the leak to a safe area and isolate them, strictly restricting access. Emergency personnel wear self-contained positive pressure breathing apparatus and anti-static work clothes to cut off the source of the leak as much as possible to prevent it from flowing into the restricted space such as sewers and drainage ditches. Small leaks should be absorbed with sand, vermiculite or other inert materials; large leaks should be contained by building a dike or digging a pit, covered with foam to reduce steam disasters, and transferred to a tanker or special collector with an explosion-proof pump for recycling or transportation to a waste treatment site for disposal.
Third, storage conditions. It should be stored in a cool and ventilated warehouse. The storage temperature should not exceed 30 ° C. Keep the container sealed. Keep away from fire and heat sources, store separately from oxidants, and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are prone to spark generation. The storage area should be equipped with leakage emergency treatment equipment and suitable containment materials.
Fourth, transportation specifications. Before transportation, check whether the packaging container is complete and sealed. During transportation, ensure that the container does not leak, collapse, fall or damage. The trough (tank) car used for transportation should have a grounding chain, and holes can be set in the trough to reduce shock and generate static electricity. It is strictly forbidden to mix and mix with oxidants, edible chemicals, etc. Road transportation should be driven according to the specified route, and do not stop in residential areas and densely populated areas.