Physical properties of benzylene acetyl benzene e.g., boiling point, melting point, properties, den

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The boiling point of benzene is, and the melting point is, and it is a colorless, sweet, aromatic and transparent liquid at room temperature, which is volatile. Benzene is less dense than water, with a density of , but its molecular mass is heavier than water. Benzene is insoluble in water, and the maximum amount of benzene dissolved in 1 liter of water is dissolved; However, benzene is a good organic solvent, and the ability to dissolve organic molecules and some non-polar inorganic molecules is very strong, and it can be miscible with most organic solvents except for glycerol, ethylene glycol and other polyols.

Except for iodine and sulfur that are slightly soluble, inorganic substances are insoluble in benzene. Benzene is non-corrosive to metals.

Benzene can form a constant boiling substance with water, and the boiling point is , containing benzene. Therefore, benzene is often distilled in reactions where water is formed to bring the water out.

The saturation vapor pressure between 10-1500 mmHg can be calculated according to the Antoine equation.

lgp = a － p/(c + t)

Parameters: a = , b = , c =

where p is in mmHg and t is in .

Chemical properties. There are roughly three types of chemical reactions in which benzene participates: one is the substitution reaction that occurs between other groups and the hydrogen atoms on the benzene ring; One is the addition reaction that occurs on the benzene ring (Note:

The benzene ring does not have a carbon-carbon double bond, but is a unique bond between a single bond and a double bond, and the six carbon atoms on the benzene ring form a special bond, which increases its stability); One is general combustion (oxidation reaction) (which does not fade acidic potassium permanganate).

1.Substitution reaction of benzene.

Under the action of concentrated sulfuric acid, benzene can also substitute with concentrated nitric acid at 50 to 60 to form nitrobenzene (this kind of reaction is also called nitrification reaction), and the reaction equation is:

Nitrification of benzene.

Catalyzed by Febr3, the hydrogen atom on the benzene ring can be replaced by bromine atoms to form bromobenzene. Bromobenzene is denser than water and is a colorless liquid. The reaction equation is:

Benzene reacts with liquid bromine.

2.Addition reaction of benzene.

Under the condition of nickel as a catalyst, benzene can undergo an addition reaction with hydrogen. The reaction equation is:

Addition reaction of benzene.

3.Oxidation reaction of benzene.

Benzene can be burned in the air, and when burned, it emits a bright and smokey flame while emitting a large amount of heat, and the reaction equation is:

Oxidation reaction of benzene.

The other name of benzylacetylbenzene is chalcone, which has a very detailed encyclopedia. (I've been looking for a long time, I've checked, it's the same compound).

The English name of benzylacetyl benzene is chalcone, which can be checked on the wiki, which is more complete.

Benzyl. AcetylbenzeneAppearanceIt is a light yellow orthorhombic prismatic crystal, benzylacetylbenzeneThe density is, benzylacetylbenzeneMelting pointIt was 58 c, benzylene ethylbenzeneThe boiling point at atmospheric pressure is 348 C, benzylacetylbenzeneRefractive indexYes, benzylacetylbenzeneFlash pointis greater than 110Celsius

Storage methods of benzylene acetylbenzeneBenzylene acetyl benzene is sealed with a pressure tank first, and the pressure tank is stored in a cool, dry location.

Benzylene acetyl benzene synthesis methodBenzylene acetyl benzene is synthesized by sodium hydroxide.

solution and ethanol.

After the mixture is cooled, stir the socks strongly, then add the newly steamed acetophenone and benzaldehyde, stir at 30 for 3h, wait for the reactants to gradually thicken, precipitate yellow precipitate, and finally recrystallize with ethanol.

Benzylene acetylbenzene can be obtained.

The boiling point of benzene is, the first melting point is, it is a colorless, sweet, aromatic transparent liquid at room temperature, volatile, benzene is less dense than water, the density is, but its molecular weight is heavier than water.

Benzene is insoluble in water, 1 liter of water dissolves benzene at most, but benzene is a good organic solvent, the ability to dissolve organic molecules and some non-polar inorganic molecules is very strong, in addition to glycerol, ethylene glycol and other polyols can be miscible with most organic solvents, except for iodine and sulfur slightly dissolved, inorganic substances are insoluble in benzene, benzene is non-corrosive to metal.

Under the action of concentrated sulfuric acid, benzene can also substitute with concentrated nitric acid at 50 to 60 to form nitrobenzene (this kind of reaction is also called nitrification).

Catalyzed by Febr3, the hydrogen atom on the benzene ring can be replaced by bromine atoms to form bromobenzene, which is denser than water and is a colorless liquid.

Under the condition of nickel as a catalyst, benzene can undergo an addition reaction with hydrogen.

Benzene can be burned in the air and emits a bright flame with thick smoke when burned.

Its melting range (melting range) can be determined, and its melting point can be determined accordingly. 3. Experimental instruments and medicines Melting point tube, surface dish, mortar, 40-50 cm glass tube, B-shaped tube, thermometer, rubber ring, homemade acetanilide, but also acetanilide (melting point 116) boiling point.

Experimental principle: The recrystallization method is a common method for purifying the organic matter of the siderolling body. The solubility of solid organic matter in solvents generally increases with the increase of temperature, and decreases on the contrary.

The solid organic matter is dissolved in a hot solvent to make a saturated solution, and then cooled to below room temperature, the original solution becomes a supersaturated solution, and the organic matter precipitates back into the crystal. The solubility of the solvent to the purified substance and impurities is different, so that the purified substance is precipitated from the supersaturated solution. Let all or large parts of the impurities remain in the solution, so as to achieve the purpose of purification.

Acetanilide, scientific name N-benzene (yl)acetamide, white shiny flake crystals or white crystalline powder, is a sulfonamide drug.

It can be used as analgesics, antipyretics and preservatives.

and dye intermediates.

Basic properties: Properties: white shiny flake crystals or white crystalline powders, recrystallized in water and precipitated into orthorhombic crystals. Odorless or slightly aniline and acetic acid odor.

Melting Point: Boiling Point: 304

Flash Point: Spontaneous ignition point: 546

Refractive Index: Relative Density:

Stability: Stable in air.

Solubility: Solubility: water5（100℃）；Ethanol.

Methanol. Chloroform.

Slightly soluble in cold water, soluble in hot water, methanol, ethanol, ether, chloroform, acetone.

Glycerol and benzene, etc., insoluble in petroleum ether.

Others: flammable, neutral or very weakly alkaline. In case of acid or alkaline aqueous solution, it is easy to decompose into aniline and acetic acid.

Acetanilide, also known as: N-phenylacetamide, antipyretic ice. Its melting point: , boiling point: 304.

Melting point of acetanilide and benzoic acid mixture 114-116.

Acetanilide is an organic compound, the chemical formula is C8H9NO, which is a colorless leafy solid or white crystalline powder with glitter, which is a raw material for sulfonamides, and can be used as analgesics, antipyretics, preservatives and dye intermediates. Acetanilide is a raw material for sulfonamides, which can be used as analgesics, antipyretics, and preservatives. It is used to manufacture dye intermediates p-nitroacetanilide, p-nitroaniline and p-phenylenediamine.

Acetanilide is also used to make thioacetamide. In industry, it can be used as a rubber vulcanization accelerator, a stabilizer for fibrolipid coatings, a stabilizer for hydrogen peroxide, and for the synthesis of camphor. It is also used as a medium for the preparation of penicillin G.

As a previous generation of analgesics and antipyretics, it has been replaced by a new generation of acetyl drugs due to its low toxicity.

Benzoic acid is an aromatic acid organic compound and the simplest aromatic acid with the chemical formula C7H6O2. It was originally made from benzoin gum, so it is called benzoin acid. Melting point, boiling point, the appearance of pure white needle-like or scaly crystals.

Sublimation at 100 or more. Slightly soluble in cold water, hexane, soluble in hot water, ethanol, ether, chloroform, benzene, carbon disulfide and turpentine.

Benzoic acid is widely found in nature in the form of free acids, esters, or their derivatives. It is mainly used for the preparation of sodium benzoate preservatives, and for the synthesis of drugs and dyes, and also for the preparation of plasticizers, mordants, fungicides and fragrances. It can be prepared by direct oxidation of toluene in the presence of manganese dioxide, or by decarboxylation of phthalic anhydride by water vapor.

Preparation method of benzoic acid:

Originally, benzoic acid was prepared by dry distillation or alkaline hydrolysis of benzoin gum, and it can also be prepared by hydrolysis of hippuric acid. Toluene, o-xylene or naphthalene are commonly used in industry to prepare benzoic acid, which can be obtained from coal tar or petroleum. In addition, benzaldehyde can be produced as a by-product of toluene.

The industrial production methods of benzoic acid mainly include toluene liquid phase air oxidation method, chlorotoluene bond hydrolysis method, phthalic anhydride decarboxylation method, and benzyl halogen oxidation method. The first to use this method to produce benzoic acid was the American Alied company. Commonly used catalysts are soluble cobalt or manganese salts, with acetic acid as the solvent.

The boiling point of acetanilide is about 305°C. Acetanilide is an organic compound, also known as N-phenylacetamide. It is a white crystalline compound that has a small amount of solubility in water but can be soluble in organic solvents such as alcohol and ether Jianling.

Acetanilide (CAS: 103-84-4) structural formula**.

Acetylbenzaneramine is an important intermediate compound, which is often used in the synthesis of dyes, pesticides, pharmaceuticals and other fields. In addition, it is also used as a desulfurizer and rubber accelerator, among others.

It is very important to understand the physical properties of acetanilide and its application in the field of chemistry, which will help us better understand its role and use, and further promote its application in industrial production.

Acetylaniline is also called acetylated aniline fiber, the molecular formula is destroyed C8H9NO, and it is a white solid at room temperature and pressure. It is an organic compound that is often used as a dye and dye intermediate in various printing and mordant processes.

The melting point of acetanilide varies slightly depending on the method of preparation and purity. In general, acetanilide has a melting point of around 113 to 115. If acetanilide is prepared by a purer chemical method, its melting point may be slightly higher than this range.

Its chemical properties are relatively stable, and it can be stored for a long time in dry, cool and ventilated conditions.

Acetanilide is a commonly used organicized closed neutral that is commonly used in dye processes and as an intermediate in the production of other compounds. Understanding the properties and characteristics of acetanilide can help to better grasp its application in industrial production.