{"id":219243,"date":"2025-05-25T21:16:28","date_gmt":"2025-05-25T21:16:28","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=219243"},"modified":"2025-05-25T21:16:30","modified_gmt":"2025-05-25T21:16:30","slug":"arrange-the-following-carbocations-in-order-of-decreasing-stability","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/25\/arrange-the-following-carbocations-in-order-of-decreasing-stability\/","title":{"rendered":"Arrange The Following Carbocations In Order Of Decreasing Stability"},"content":{"rendered":"\n
    \n
  1. [6 Points] Arrange The Following Carbocations In Order Of Decreasing Stability. (1 = Most Stable, 5 = Least Stable) H2 -CH3 CH3 CH2<\/li>\n<\/ol>\n\n\n\n

    Arrange the following carbocations in the order of decreasing stability<\/p>\n\n\n\n

      \n
    1. [6 points] Arrange the following carbocations in order of decreasing stability. (1 = most stable, 5 = least stable) H2 -CH3 CH3 CH2<\/li>\n<\/ol>\n\n\n\n

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

      To accurately arrange the given carbocations in order of decreasing stability<\/strong>, we need to first identify what each species refers to:<\/p>\n\n\n\n

        \n
      1. CH\u2083\u207a<\/strong> \u2014 Methyl carbocation<\/li>\n\n\n\n
      2. CH\u2082\u207a (H\u2082C\u207a)<\/strong> \u2014 Methylene carbocation<\/li>\n\n\n\n
      3. CH\u2083CH\u2082\u207a<\/strong> \u2014 Ethyl carbocation<\/li>\n\n\n\n
      4. The question is somewhat ambiguous with formatting. Assuming it’s listing 5 distinct species, here is a likely interpretation:\n
          \n
        • CH\u2083\u207a<\/strong> (methyl carbocation)<\/li>\n\n\n\n
        • CH\u2082\u207a<\/strong> (methylene)<\/li>\n\n\n\n
        • CH\u2083CH\u2082\u207a<\/strong> (ethyl)<\/li>\n\n\n\n
        • Possibly (CH\u2083)\u2082CH\u207a<\/strong> (isopropyl carbocation)<\/li>\n\n\n\n
        • Possibly (CH\u2083)\u2083C\u207a<\/strong> (tert-butyl carbocation)<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n

          Let\u2019s assume the intended carbocations are:<\/p>\n\n\n\n

            \n
          1. (CH\u2083)\u2083C\u207a<\/strong> \u2013 tert-butyl<\/li>\n\n\n\n
          2. (CH\u2083)\u2082CH\u207a<\/strong> \u2013 isopropyl<\/li>\n\n\n\n
          3. CH\u2083CH\u2082\u207a<\/strong> \u2013 ethyl<\/li>\n\n\n\n
          4. CH\u2083\u207a<\/strong> \u2013 methyl<\/li>\n\n\n\n
          5. CH\u2082\u207a<\/strong> \u2013 methylene<\/li>\n<\/ol>\n\n\n\n

            Correct Order (1 = Most Stable):<\/strong><\/h3>\n\n\n\n

            (CH\u2083)\u2083C\u207a > (CH\u2083)\u2082CH\u207a > CH\u2083CH\u2082\u207a > CH\u2083\u207a > CH\u2082\u207a<\/strong><\/p>\n\n\n\n

            \n\n\n\n

            Explanation<\/strong><\/h3>\n\n\n\n

            Carbocation stability is influenced by inductive effects<\/strong>, hyperconjugation<\/strong>, and resonance<\/strong>. In this list, none of the carbocations are resonance-stabilized, so hyperconjugation and inductive effects<\/strong> dominate.<\/p>\n\n\n\n

              \n
            1. Tert-butyl carbocation ((CH\u2083)\u2083C\u207a)<\/strong> is the most stable<\/strong> because the central carbon is attached to three methyl groups, providing maximum hyperconjugation<\/strong>. Each methyl donates electron density through sigma bonds to the positively charged carbon, delocalizing the charge.<\/li>\n\n\n\n
            2. Isopropyl carbocation ((CH\u2083)\u2082CH\u207a)<\/strong> is next. It is a secondary carbocation<\/strong>, receiving stabilizing hyperconjugation from two methyl groups. Though less stabilized than a tertiary carbocation, it is still more stable than a primary one.<\/li>\n\n\n\n
            3. Ethyl carbocation (CH\u2083CH\u2082\u207a)<\/strong> is a primary carbocation<\/strong>, with only one methyl group available to donate electron density. Therefore, it has minimal hyperconjugation, making it less stable than both isopropyl and tert-butyl.<\/li>\n\n\n\n
            4. Methyl carbocation (CH\u2083\u207a)<\/strong> has no alkyl groups to stabilize the positive charge, making it highly unstable<\/strong>. It lacks hyperconjugation and inductive stabilization.<\/li>\n\n\n\n
            5. Methylene carbocation (CH\u2082\u207a)<\/strong> is the least stable<\/strong> because the positive charge is on a carbon that only has two hydrogen atoms and lacks even the stabilization of a full methyl group. It is a singlet carbene-like species<\/strong>, extremely reactive and unstable.<\/li>\n<\/ol>\n\n\n\n

              Thus, the more substituted the carbocation, the more stable it is due to greater hyperconjugation and inductive electron donation from surrounding alkyl groups.<\/p>\n\n\n\n

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

              Arrange the following carbocations in the order of decreasing stability The Correct Answer and Explanation is: To accurately arrange the given carbocations in order of decreasing stability, we need to first identify what each species refers to: Let\u2019s assume the intended carbocations are: Correct Order (1 = Most Stable): (CH\u2083)\u2083C\u207a > (CH\u2083)\u2082CH\u207a > CH\u2083CH\u2082\u207a > […]<\/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-219243","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/219243","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=219243"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/219243\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=219243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=219243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=219243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}