{"id":237387,"date":"2025-06-17T07:56:06","date_gmt":"2025-06-17T07:56:06","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=237387"},"modified":"2025-06-17T07:56:08","modified_gmt":"2025-06-17T07:56:08","slug":"consider-the-elimination-reaction","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/17\/consider-the-elimination-reaction\/","title":{"rendered":"Consider the elimination reaction"},"content":{"rendered":"\n

Consider the elimination reaction: 2-bromohexane CH3CH2CH2CH2CH2CH2Br + NaOH \u00e2\u2020\u2019 CH3CH2CH2CH2CH2CH2OH + NaBr The product(s) of the reaction is(are): Select one: a. CH3CH=CHCH2CH2CH3 b. CH3CH2CH2CH2CH=CH2 c. An equimolar mixture of a and b. d. A mixture of the major product a with the minor product b. e. A mixture of the major product b with the minor product<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The elimination reaction of 2-bromohexane with sodium hydroxide proceeds via the E2 mechanism<\/strong>, given that the reaction involves a strong base. In this mechanism, the base abstracts a proton from the \u03b2-carbon<\/strong> (the carbon adjacent to the carbon bearing the leaving group), leading to the formation of a double bond<\/strong> and the expulsion of the leaving group (bromine).<\/p>\n\n\n\n

Determining the Major and Minor Products:<\/h3>\n\n\n\n

For 2-bromohexane, elimination can occur in two different ways:<\/p>\n\n\n\n

    \n
  1. Formation of CH3CH=CHCH2CH2CH3<\/strong> This product forms when the base abstracts a proton from the carbon adjacent to the more substituted<\/strong> site, leading to a more stable<\/strong>, more substituted alkene<\/strong>.<\/li>\n\n\n\n
  2. Formation of CH3CH2CH2CH2CH=CH2<\/strong> This product forms when the base abstracts a proton from the less substituted<\/strong> carbon, yielding a less substituted alkene<\/strong>.<\/li>\n<\/ol>\n\n\n\n

    Applying Zaitsev’s Rule:<\/h3>\n\n\n\n

    According to Zaitsev’s Rule<\/strong>, the more substituted alkene<\/strong> is favored as the major product. This means that CH3CH=CHCH2CH2CH3<\/strong> is major<\/strong>, while CH3CH2CH2CH2CH=CH2<\/strong> is minor<\/strong>.<\/p>\n\n\n\n

    Correct Answer:<\/h3>\n\n\n\n

    The reaction yields a mixture<\/strong> of products, with CH3CH=CHCH2CH2CH3<\/strong> as the major product and CH3CH2CH2CH2CH=CH2<\/strong> as the minor product. Therefore, the correct answer is: d. A mixture of the major product a with the minor product b.<\/strong><\/p>\n\n\n\n

    This result aligns with Zaitsev\u2019s Rule<\/strong>, which predicts the formation of the most substituted<\/strong> and most stable alkene<\/strong> in E2 elimination<\/strong>. The reaction favors thermodynamic stability<\/strong>, making the more substituted<\/strong> product predominant<\/strong> in the mixture.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Consider the elimination reaction: 2-bromohexane CH3CH2CH2CH2CH2CH2Br + NaOH \u00e2\u2020\u2019 CH3CH2CH2CH2CH2CH2OH + NaBr The product(s) of the reaction is(are): Select one: a. CH3CH=CHCH2CH2CH3 b. CH3CH2CH2CH2CH=CH2 c. An equimolar mixture of a and b. d. A mixture of the major product a with the minor product b. e. A mixture of the major product b with the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-237387","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=237387"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237387\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=237387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=237387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=237387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}