{"id":187150,"date":"2025-02-01T08:52:54","date_gmt":"2025-02-01T08:52:54","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=187150"},"modified":"2025-02-01T08:52:56","modified_gmt":"2025-02-01T08:52:56","slug":"identify-the-expected-major-organic-product-from-the-reaction-shown-below","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/01\/identify-the-expected-major-organic-product-from-the-reaction-shown-below\/","title":{"rendered":"Identify the expected major organic product from the reaction shown below"},"content":{"rendered":"\n

Identify the expected major organic product from the reaction shown below. Br2 \/ H20 ? Br OH Br OH ?? Br OH Br Br III A 1 B 11 III D IV V<\/p>\n\n\n\n

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

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

The reaction shown involves the addition of bromine (Br\u2082) and water (H\u2082O)<\/strong> to an alkene. This is a well-known halohydrin formation reaction<\/strong>, which follows anti-addition<\/strong> and regioselectivity due to the formation of a bromonium ion intermediate.<\/p>\n\n\n\n

Step 1: Formation of the Bromonium Ion<\/strong><\/h3>\n\n\n\n
    \n
  • When Br\u2082<\/strong> is added to the alkene, a three-membered bromonium ion intermediate<\/strong> forms. This structure prevents free rotation and leads to stereospecific addition.<\/li>\n<\/ul>\n\n\n\n

    Step 2: Nucleophilic Attack by Water<\/strong><\/h3>\n\n\n\n
      \n
    • Water (H\u2082O), acting as a nucleophile<\/strong>, attacks the more substituted carbon of the bromonium ion due to Markovnikov’s rule<\/strong> (since the more substituted carbon can better stabilize the positive charge).<\/li>\n\n\n\n
    • This attack occurs anti<\/strong> to the bromine due to steric hindrance, resulting in an anti-addition.<\/li>\n<\/ul>\n\n\n\n

      Step 3: Formation of the Halohydrin<\/strong><\/h3>\n\n\n\n
        \n
      • After deprotonation, the major product is a halohydrin<\/strong> where a hydroxyl (-OH) group attaches to the more substituted carbon and a bromine (Br) remains on the less substituted carbon.<\/li>\n<\/ul>\n\n\n\n

        Product Selection<\/strong><\/h3>\n\n\n\n

        Given the multiple-choice options in the image:<\/p>\n\n\n\n

          \n
        • The correct product should show Br and OH in anti orientation<\/strong>.<\/li>\n\n\n\n
        • The hydroxyl (-OH) should be on the more substituted carbon<\/strong>.<\/li>\n\n\n\n
        • The bromine (Br) should be on the less substituted carbon.<\/li>\n<\/ul>\n\n\n\n

          From the given options, Option II (B) appears to be the correct answer<\/strong> since it follows both anti-addition and regioselectivity rules.<\/p>\n\n\n\n

          Conclusion<\/strong><\/h3>\n\n\n\n

          The reaction of an alkene with Br\u2082 and H\u2082O<\/strong> leads to a halohydrin product<\/strong> with anti-stereochemistry. The bromonium ion intermediate dictates the regioselectivity, leading to the hydroxyl (-OH) attacking the more substituted carbon. Thus, the correct major organic product is II (B)<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

          Identify the expected major organic product from the reaction shown below. Br2 \/ H20 ? Br OH Br OH ?? Br OH Br Br III A 1 B 11 III D IV V The Correct Answer and Explanation is : The reaction shown involves the addition of bromine (Br\u2082) and water (H\u2082O) to an alkene. […]<\/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-187150","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/187150","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=187150"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/187150\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=187150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=187150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=187150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}