{"id":148626,"date":"2022-03-21T09:27:58","date_gmt":"2022-03-21T03:57:58","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/preparation-of-alkynes-introduction-methods-of-preparation-and-faqs\/"},"modified":"2024-12-13T15:56:12","modified_gmt":"2024-12-13T10:26:12","slug":"preparation-of-alkynes-introduction-methods-of-preparation-and-faqs","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/chemistry\/preparation-of-alkynes\/","title":{"rendered":"Preparation of Alkynes &#8211; Introduction, Methods of Preparation, and FAQs"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/preparation-of-alkynes\/#Introduction_to_Alkynes\" title=\"Introduction to Alkynes\">Introduction to Alkynes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/preparation-of-alkynes\/#Methods_of_Preparation_of_Alkynes\" title=\"Methods of Preparation of Alkynes\">Methods of Preparation of Alkynes<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_to_Alkynes\"><\/span>Introduction to Alkynes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Alkynes are organic molecules that contain a carbon-carbon triple bond. They are named for the alkane functional group they resemble (e.g., ethyne is the simplest alkyne). Alkynes are generally unstable and reactive, and are not found in nature. Preparation of Alkynes &#8211; Introduction Methods of Preparation and FAQs.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-148625 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/preparation-of-alkynes-introduction-methods-of-preparation-and-faqs.jpg\" alt=\"Preparation of Alkynes - Introduction, Methods of Preparation, and FAQs\" width=\"606\" height=\"428\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/preparation-of-alkynes-introduction-methods-of-preparation-and-faqs.jpg?v=1647835075 606w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/preparation-of-alkynes-introduction-methods-of-preparation-and-faqs-300x212.jpg?v=1647835075 300w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Methods_of_Preparation_of_Alkynes\"><\/span>Methods of Preparation of Alkynes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are two main methods for preparing alkynes: the Wittig reaction and the hydroboration-oxidation reaction.<\/p>\n<p>The Wittig reaction involves the reaction of a phosphonium ylide with an aldehyde or ketone to form an alkene. The hydroboration-oxidation reaction involves the reaction of an alkyne with hydrogen and borane to form an alkene, followed by the oxidation of the alkene to an alkyne.<\/p>\n<p>Alkynes, also known as acetylenes, are a type of hydrocarbon that contain a carbon-carbon triple bond. They are relatively rare and are most commonly found in natural gas and petroleum. Alkynes can be prepared in the laboratory by a variety of methods, the most common of which is the reduction of an alkyne with a strong reducing agent such as lithium aluminum hydride (LiAlH4).<\/p>\n<p>The most common method for the preparation of alkynes is the reduction of an alkyne with a strong reducing agent such as lithium aluminum hydride (LiAlH4). In this procedure, the alkyne is dissolved in anhydrous tetrahydrofuran (THF) and the LiAlH4 is added. The reaction produces lithium hydride (LiH) and the alkane product.<\/p>\n<p>The following equation illustrates the reaction:<\/p>\n<p>C\u2261C + 2LiAlH4 \u2192 LiH + C2H4<\/p>\n<p>Another common method for the preparation of alkynes is the reaction of an alkyne with a halogenated alkane in the presence of a base. In this procedure, the alkyne is treated with a halogenated alkane in the presence of a base such as sodium hydroxide (NaOH). The reaction produces the alkane product and a salt.<\/p>\n<p>The following equation illustrates the reaction:<\/p>\n<p>C\u2261C + CH3CH2Br \u2192 C2H4 + CH3CH2BrO<\/p>\n<p>Alkynes can also be prepared by the reaction of an alkyne with an aldehyde or ketone in the presence of a base. In this procedure, the alkyne is treated with an aldehyde or ketone in the presence of a base such as<a href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/sodium-hydroxide\/\"> sodium hydroxide<\/a> (NaOH). The reaction produces the alkane product and an alcohol.<\/p>\n<p>The following equation illustrates the reaction:<\/p>\n<p>C\u2261C + CH3CHO \u2192 C2H4 + CH3CH2OH<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction to Alkynes Alkynes are organic molecules that contain a carbon-carbon triple bond. They are named for the alkane functional [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Preparation of Alkynes - Introduction Methods of Preparation and FAQs","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Learn about Preparation of Alkynes - Introduction Methods of Preparation and FAQs explained by subject experts on infinitylearn.com.","custom_permalink":"chemistry\/preparation-of-alkynes\/"},"categories":[1],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Preparation of Alkynes - Introduction, Methods of Preparation, and FAQs - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Learn about Preparation of Alkynes - Introduction Methods of Preparation and FAQs explained by subject experts on infinitylearn.com.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/preparation-of-alkynes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Preparation of Alkynes - 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