{"id":4729,"date":"2021-06-10T05:36:46","date_gmt":"2021-06-10T05:36:46","guid":{"rendered":"https:\/\/enorcerna.com\/wiki\/definition\/alkenes\/"},"modified":"2021-06-10T05:36:46","modified_gmt":"2021-06-10T05:36:46","slug":"alkenes","status":"publish","type":"post","link":"https:\/\/enorcerna.com\/wiki\/definition\/alkenes\/","title":{"rendered":"alkenes"},"content":{"rendered":"
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\"Alkene\"It is known as alkenes<\/strong> to the hydrocarbons<\/strong> unsaturated type that have molecules with at least one carbon-carbon double bond<\/strong>. These compounds are alkanes<\/strong> that, by losing a pair of hydrogen atoms, they start to have a double bond formed by two carbons.<\/p>\n

It is important to mention that the notion of alkenes is not included in the dictionary of Royal Spanish Academy<\/strong> (RAE<\/strong>). On the other hand, the concept of alkanes does appear.<\/p>\n

Alkenes used to be known as olefins<\/strong>, since the compounds of greater simplicity generate oils when establishing a reaction with a halogen. Alkenes, on the other hand, have different physical characteristics with respect to alkanes<\/strong> because the carbon double bond changes properties related to acidity and polarity, for example.<\/p>\n

Through different chemical reactions, alkenes are transformed into different organic compounds. Said reactions<\/strong> they can be pericyclic mechanisms, the action of free radicals or electrophilic additions. Let's look at these concepts in more detail:<\/p>\n

* chemical reaction<\/strong>: It's about a phenomenon<\/strong> which is also known as chemical change<\/em> and that consists of a thermodynamic process (certain magnitudes go through an evolution) in which one or more substances undergo a transformation that changes their bonds and their molecular structure to give rise to new substances, which are called products<\/em>. Iron oxide, for example, is formed through a chemical reaction between iron and oxygen in the air;<\/p>\n

* pericyclic reaction<\/strong>: it is a concept belonging to organic chemistry, and that serves to define a reaction in which a cyclic geometric in the state of transition<\/strong>. It is possible to classify these types of reactions as electrocyclic, sigmatropic, cycloaddition, chelotropic<\/strong> or group transfer<\/strong>. It is known that they are usually in chemical equilibrium, that is, there are no net changes in concentrations and activities over time, although a shift in equilibrium in one direction may occur if the energy content of the product is considerably reduced;<\/p>\n

\"Alkenes\"* free radical<\/strong>: this chemical species, whose action can collaborate with the transformation of alkenes into other compounds, can be organic or inorganic<\/strong> and today it is simply called radical<\/em>. It is characterized by having a minimum of one unpaired electron<\/strong> (also called unpaired electron<\/em>, is the one in which there is no compensation of its spin by another electron that has it opposite). The formation of the radical takes place when a molecule undergoes a homolytic breakdown in the middle of a chemical reaction and is usually very unstable, which is why it lives only a few milliseconds but is considerably reagent<\/strong>;<\/p>\n

* electrophilic addition<\/strong>: a reaction of this type is characterized by the loss of a pi bond that a chemical compound undergoes, thanks to which two new sigma bonds are formed. It is framed in the organic chemistry<\/strong>, more precisely in the reaction mechanisms. The substrates that usually appear in an electrophilic addition have carbon-carbon double or triple bonds. Generally, this type of reaction is biomolecular or second order.<\/p>\n

Among the alkenes, we can mention the ethylene<\/strong>, which is located in the plants<\/strong>. When water is added to ethylene, it is possible to obtain ethanol<\/strong>. On the other hand, through a metallic catalyst, a reaction between ethylene and molecular hydrogen can be carried out to achieve ethane<\/strong>.<\/p>\n

The isobutylene<\/strong> is another alkene that is used in the field of industry<\/strong>. With a branched structure, isobutylene is a colorless gas that is flammable when under normal temperature and pressure conditions.<\/p>\n<\/p><\/div>\n\n\n

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It is known as alkenes to the hydrocarbons unsaturated type that have…<\/p>\n","protected":false},"author":1,"featured_media":4730,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-4729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-definition"],"_links":{"self":[{"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/posts\/4729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/comments?post=4729"}],"version-history":[{"count":0,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/posts\/4729\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/media\/4730"}],"wp:attachment":[{"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/media?parent=4729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/categories?post=4729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enorcerna.com\/wiki\/wp-json\/wp\/v2\/tags?post=4729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}