What is the reaction process of ethylene oxide and Grignard reagent under acidic conditions?

Under acidic conditions, ethylene oxide.

The oxygen atom is first protonated, which enhances the polarity of the carbon-oxygen bond, which is conducive to the attack of nucleophile reagent, which happens to format the reagent.

It is the nucleophile that attacks the oxygen atom so that the reaction takes place.

Under acidic conditions, carboxylic acids and carbon dioxide are formed, divalent manganese ions, and the purple color disappears.

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Under alkaline conditions, carboxylate and tan manganese dioxide precipitates are formed, and the purple color disappears. Under acidic conditions, carboxylic acids and carbon dioxide are formed, divalent manganese ions, and the purple color disappears. .

3. Grignard reagent and ethylene oxide reaction Grignard reagent is often used to prepare alcohol with two carbon atoms added. Example: 4, Hydrolysis of halogenated hydrocarbons This method is only applicable to:

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The H+ in the book is not a reaction under acidic conditions, but is a two-step reaction with Grignard reagent followed by acid hydrolysis.

Ethylene oxide is first attacked by the carbon negative attack of Grignard reagent, and the ring is open C2H4O+Rmgbr R-ch2ch2OMGBR

The product is hydrolyzed to give R-CH2CH2OH

1) Hot concentrated sulfuric acid soaking. Disadvantages: high danger, toxicity, corrosiveness, although the simplest and lowest cost, but usually in the removal of hardened epoxy resin packaging and curing protective shell at the same time, but also corroded all electronic components with components structure metal ceramic parts and components.

2) Dissolution of organic solvents such as chloroform and ethyl acetate. Disadvantages: poor effect, long time.

3) It is best to use a professional epoxy resin dissolving solution.

Chemistry - Solubility of common substances.

The structural formula of ethylene oxide resin can be expressed by -(-ch2-ch2-o-)n-.

It is a dangerous good, which is a colorless or light yellow liquid with fragrance. Melting point -40, boiling point 130-132, flash point 27. Relative density (20 4), insoluble in water, can be miscible with ethanol, acetone, ether and other volatile substances; Flammable, volatile and non-corrosive.

Standard dangerous goods. Of course, also hazardous chemicals.

Clinical waste is classified as hazardous waste. "Waste generated in the development of new chemicals for medical waste classification HW15 includes chemical analysis, manufacturing of plastic and rubber products, electronics.

There is some damage.

There are many homes for modified epoxy resin grouting materials. Look at what quality, if it is a high-end material, there is a solid waterproof, and has undertaken many national projects, such as the Beijing-Shanghai high-speed railway, Guangzhou Asian Games waterproof, etc.

The ** in each place is different, but the overall water polyurethane is more popular, and the epoxy is less used, and if it is elastic polyurethane, I think it is better!!

Hunan Xianyue Technology LVE modified epoxy resin grout is a kind of high permeability, can make up the latest chemical grouting of watery concrete cracks, the grout viscosity is low, the fillability is good, the early calorific value is small, the viscosity growth is slow, the initial setting time is long, and can be bonded with dry, wet, saturated water and pressurized flowing water by the irrigation body, the bonding strength is high, and the LVE grouting material is cured.

Ultra-fine cement grout is a cement-based grouting material, and the modified epoxy grouting fluid is an epoxy-based material. You can choose the material according to your construction needs.

Epoxy resin is generally used as an additive, and this thing is generally made into three components, A resin, B curing agent, C filler. When the AB composition changes, there is epoxy cement, epoxy mortar, epoxy resin grout, modified epoxy and so on.

I don't know what you use, take ethylene as an example, first add ethylene to chlorinated water, and then Ca(OH)2 treatment after addition to obtain ethylene oxide.

All resins containing epoxy groups are collectively referred to as epoxy resins. There are many types of it, and among all kinds of epoxy resins, bisphenol A type has the largest output and the most widely used, and is known as a general-purpose epoxy resin.

It has a hydroxyl group, an ether bond and an extremely reactive epoxy group - CH-CH2- in its molecular structure

I think it should be called dimethylbutylacecic ether, and the naming idea is to find the bead chain and the belonging of the substance, and then use the systematic nomenclature to name the substance.

N(CH2)2O + NCO2 == Catalyst == - (OCH2CH2OOC-)-N

CH2CH2O+H2O=HOCH2CH2OH Ethylene oxide reacts with water to form ethylene glycol, which is usually carried out under weak acid or weak alkali conditions.