Explain the substitution reaction of alkyls
The substitution reaction of alkyls had the following phenomena and characteristics: 1. ** Reaction conditions ** - Requires light (no reaction in the dark at room temperature, but direct light cannot be used, otherwise it will explode). 2. ** Reactants ** - The reagent was a pure elemental gas, such as a gaseous mixture of sulfur and hydrogen. 3. ** Reaction progress ** - The reaction wouldn't stop at a single step. It would proceed step by step, and the final product would be a mixture of many substances. For example, if one hydrogen atom (1 mole of H) was replaced, one mole of Cl2 was needed. It was wrong to think that one Cl2 could replace two H atoms. For example, in the substitution reaction of methane, the atoms in the Cl3 could "seize" a hydrogen atom in the methane, and then compensate a Cl3 atom to the methane to form methachloromethanes. The reaction would continue, gradually forming various products such as methylethylane, methylethylane, and methachloromethanes. Read more exciting novels for free
What is the state of the substitution reaction of alkyls?
Alkane substitution reaction was a chemical reaction process in which the active position of the organic group was replaced. For the common substitution reaction of alkyls (such as the reaction of methane and Cl2), the reaction condition is light (at room temperature, there is no reaction in the dark, but it cannot be directly illuminated by strong light, otherwise it will explode); The reagent is a pure halo elemental gas, for example, methane does not react when it is added to the bromic water; The reaction will not stop at a certain step, so the product is a mixture of various substances;1 mole of H is replaced, and 1 mole of Cl2 is needed. It is wrong to think that one Cl2 atom can replace two H atoms. From the reaction mechanism: 1. The substitution reaction was a substitution reaction that occurred in a water medium. An organic group in the alkyls reacted with water to form an ion form of the carbonates and the alkyls. Then, an organic substitution reaction occurred to form a new organic compound. 2. The substitution reaction referred to the substitution reaction that occurred under the effect of a catalyst. Commonly used catalyst included sulfuric acid derivative, organic sulfur, alcohol, basic metal oxides, and organic bases. Under the effect of the catalyst, the original acidic groups were replaced in the alkyls to form new organic substances. There were also situations such as electron substitution reactions. The chemical properties of cycloalkyls were similar to those of alkyls, and the substitution reactions were also similar. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which two gases can be produced by the substitution reaction of alkyls?
Alkane and gaseous halo elements (such as Cl2, Bromine vapor, etc.) undergo a substitution reaction under light conditions. The product is a mixture of various tributyl compounds and hydrogen Halide (HX). Therefore, the two gases produced may be the unreacted halo elements (such as Cl2 or Bromine vapor, etc.) and hydrogen Halide (HX). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction type of the laboratory preparation equation for alkyls?
Alkane can be prepared by the reaction of an alkyls and metallic Na (Wurtz reaction), which is a type of free radical reaction. The reaction equation used the synthesis of diethylethyldimethoxysane from trimethylethyltrimethoxysane, bromic ether, and metallic Na as raw materials: 2CH3CH2Br2 + 2Na → CH3CH2-CH2CH3 + 2NaBr2. This reaction was a free radical reaction. In addition, alkyls were generally obtained from natural gas and oil. If pure alkyls were needed, they could also be synthesized. The substitution reaction of alkyls was a free radical substitution reaction (for example, the substitution reaction between alkyls and halos, the reaction conditions were light or high temperature), but this was not the main reaction type of alkyls. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The mechanism of the substitution reaction is
There were two mechanisms for the substitution reaction: 1. ** Bimoleral Nucleic Substitution Reaction (Sn2)**: - This was a bimoleral reaction, and the reaction rate depended on the concentration of the halon and the concentration of the nuclophile. - The reaction was completed in one step. During the reaction process, the central carbon atom of the cleaved carbon dioxide was attacked by the nuclophile and left by the leaving group at the same time, and it would go through a transition state. In the transition state, the nuclophile and the cleaved carbon dioxide were connected by a partial bond, and the leaving group and the cleaved carbon dioxide were also connected by a partial bond. - The reaction process was accompanied by a transformation of the configuration, known as the Walden transformation, which was an important sign of the Sn2 reaction. For example, R - 2 -Bromobutan would be converted to S - 2 -Butanol when 2 -Bromobutan was being digested. 2. ** Unimoleral Nucleophile Substitution Reaction (sn1)**: - The reaction was carried out in two steps. The first step was to undergo a slow reaction of heterocracking of the aromatic compounds to form the active intermediate carbon ions. This step was the step that determined the reaction rate. The second step was to combine the carbon ions with the nuclophile to form a product. - The product was racemized. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between ethene and alcohol is a substitution reaction
The reaction between ethene and ethanoi was an electropathic addition reaction, not a substitution reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula of Substitution Reaction for the addition reaction of organic substances
Additional reaction: - The addition reaction of ethene and Bromine: <<CH2 = CH2 + Br2> - The addition reaction of ethene and hydrogen bromidate was as follows: <CH2 = CH2> - Under certain conditions, addition reactions could also occur between ethene, hydrogen, and water. Since the chemical properties of ethyne (carbon-carbon triple bond) were similar to that of alkene (carbon-carbon double bond), similar addition reactions could also occur. - The aromatic ring can undergo an addition reaction with hydrogen (in the presence of a catalyst such as Ni). - Aldol groups can undergo a reduction reaction (addition reaction), such as: <anno data-annotation-id ="00000000 - 4c00 - 4c00 - 8c00 - 9c00 - 9c000b000000"> CH3CH20H </anno>. Substitution reaction: - The substitution reaction between methane and Cl2: CH4 + Cl2. - The substitution reaction of the aromatic ring: For example, the substitution reaction with the aromatic group using FeBr3 as a catalyst; the nitration reaction with the aromatic group using concentrated sulfuric acid under heating conditions (the hydrogen on the aromatic ring is replaced by the nitrogen group). - The substitution reaction of the halated carbon was as follows: <<CH3CH2Br2>+<NaBr2>>. - The substitution reaction of alcohol: <CH3CH20H>+<br>> longrightarrow <CH3CH2br>+<H2O>> - The ester's cleavage reaction (which can be seen as a substitution reaction):<CH3COOCH2CH3 + H2O> <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Substitution Reaction of Sodium-ethanate
The reaction between alcohol and Na was a substitution reaction, and the reaction equation was C Chi H Oh + 2Na -> C Chi H ONa + Chi H. In this reaction, the alcohol was replaced by a hydrogen atom, forming a mixture of hydrogen and ethanate. It could be used as a reducing agent, a catalyst, and a catalyst. It could also be used to prepare other compounds such as acetate-ether and acetate-ether. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Research on Alkane Substitution Reaction Experiment
The following are some of the innovative studies on the substitution reaction of alkyls: * * I. Experiment Equipment ** 1. * * Using a variety of special instruments ** - With the introduction of a pH-sensor, the experiment results could be observed and analyzed directly in the experiment of the substitution reaction of the alkyls. For example, in a substitution reaction using portable gas (the main components of the ane) as the source of the alkyls, the possible changes in the reaction process could be monitored in real time through the pH-sensor, which would help to understand the process of the reaction and possible side reactions. - A three-necked flask, a 50-milliliter syringe, a 23W incandescent lamp, aluminum foil, a single-hole rubber stopper, a guide tube, a water-stop clamp, a 500-milliliter beaker, an iron stand (with two iron clips and an iron ring), and other equipment were used to construct the experimental device. The three-necked bottle could easily add a variety of reagents and control the reaction conditions; the syringe could accurately control the amount of gas or liquid reagents added; the incandescent lamp provided the illumination conditions needed for the reaction, etc. 2. * * Combined with modern technology ** - The real-time projection technology could provide feedback on the students 'experiment situation in a timely manner. When students in chemistry clubs or interest groups carried out extra-cursory exploration experiments on the substitution reaction of alkyls, teachers and other students could clearly see the experimental operation process, reaction phenomena, etc. through the projection, so as to facilitate the discovery of problems, guidance, and communication. * * 2. Experimental Drug Development ** 1. * * Choose Special Reaction Material ** - The portable gas (mainly composed of Butane and Propane) was used as the source of the alkyls. This kind of material that was easy to obtain in life made the experiment closer to life. Compared with the traditional experiment using methane, it solved the problem that it was difficult to produce pure gas in large quantities. Butane and Propane could also reflect the substitution reaction characteristics of alkyls. - In terms of testing the reaction phenomenon, the use of reagents such as basic fuchsin could help to observe and verify the occurrence and process of the reaction from different angles. 2. * * Associate with other experimental drugs for innovation ** - In the preparation of Cl2, chemicals such as KmO2 solid, concentrated sulfuric acid, saturated salt water, and a solution of NaOx were used. The preparation of Cl2 was carried out through reasonable devices (such as conical flasks, double-hole rubber stoppers, separating funnels, pipes, water tanks, etc.). The saturated salt solution could be used for drainage and gas collection operations, and the NaOx solution could be used for tail gas treatment. The combination and usage of these drugs made the entire experimental drug system more perfect and environmental friendly. * * 3. The innovation of experimental design ideas ** 1. * * Reaction combination innovation ** - Combining the organic substitution reaction with the experiment of the mineral fountain. Since the substitution reaction of alkyls was a reaction that reduced the volume of gas, it could theoretically be combined with the fountain experiment in compulsory subject 1. This combination increased the interest of the experiment. For example, when the substitution reaction was carried out with a ane or a ane, the change in the gas volume after the reaction could be visualized through a phenomenon similar to a fountain experiment, which would help students better understand the reaction principle. 2. * * Design based on curriculum integration ** - Combining the knowledge of the first section of the third chapter of the compulsory high school chemistry textbook,"The simplest organic matter--methane", and the first section of the second chapter of the elective book,"Fatty Alkane", according to the students 'cognitive level, the experiment was designed for the students of the chemistry club or interest group. This kind of design idea that integrated knowledge from different courses would help students understand the principle of the substitution reaction more deeply and comprehensively. They would also discover problems and phenomena that were not noticed in the textbook during the experiment process, and cultivate students 'scientific attitude, questioning spirit, and innovative consciousness. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Substitution Reaction of Butane and Bromine Steam
Butane and Bromine vapor would undergo a substitution reaction under light conditions. During the reaction, the hydrogen atoms in the Butane molecules would gradually be replaced by Bromine atoms, forming a variety of Bromobutane products. For example, n-Butane produced various kinds of chloride-Butane through free radical substitution reaction. The reaction between Butane and Bromine vapor was similar. During the reaction, similar free radical would participate in the reaction, gradually forming products such as monobromobutane and producing Brr. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Alkane substitution reaction consumes the most Cl2
In the substitution reaction between an alkyls and a hydrogen atom, one hydrogen atom could only be replaced by one hydrogen atom. To maximize the consumption of Cl2, all the hydrogen atoms in the alkyls were replaced by Cl2 atoms. According to the general formula of alkyls, the larger the number of hydrogen atoms, the more hydrogen atoms there were, and the more Cl2 would be consumed during the complete substitution. Theoretically, alkyls with infinite carbon number would consume the most Cl2 during the complete substitution reaction, but there was no specific alkyls with the largest number of hydrogen atoms. As long as the carbon number continued to increase, the amount of Cl2 consumed would continue to increase. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>