{"id":203949,"date":"2025-03-21T06:48:28","date_gmt":"2025-03-21T06:48:28","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=203949"},"modified":"2025-03-21T06:48:30","modified_gmt":"2025-03-21T06:48:30","slug":"in-a-sn2-reaction-what-is-the-required-angle-for-the-reaction-to-occur","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/21\/in-a-sn2-reaction-what-is-the-required-angle-for-the-reaction-to-occur\/","title":{"rendered":"In a SN2 reaction, what is the required angle for the reaction to occur"},"content":{"rendered":"\n<p>In a SN2 reaction, what is the required angle for the reaction to occur? <\/p>\n\n\n\n<p>a) 90 <\/p>\n\n\n\n<p> b)120<\/p>\n\n\n\n<p> c) 180<\/p>\n\n\n\n<p> d) None of the above <\/p>\n\n\n\n<p>e) a and b<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is:<\/p>\n\n\n\n<p><strong>c) 180<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>An <strong>SN2 (Substitution Nucleophilic Bimolecular)<\/strong> reaction occurs in a single, concerted step where the nucleophile directly attacks the electrophilic carbon, displacing the leaving group in a <strong>backside attack<\/strong> mechanism. This backside attack is crucial for the reaction to proceed and results in <strong>inversion of configuration<\/strong> at the carbon center.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Why 180\u00b0 is Required?<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Backside Attack Mechanism<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In an SN2 reaction, the nucleophile must approach the carbon center from the side opposite to the leaving group.<\/li>\n\n\n\n<li>For this to happen efficiently, the angle between the nucleophile and the leaving group must be <strong>180\u00b0<\/strong>, meaning they are positioned exactly opposite each other.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Orbital Overlap Consideration<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The carbon undergoing substitution is usually <strong>sp\u00b3 hybridized<\/strong>, with a tetrahedral geometry.<\/li>\n\n\n\n<li>The optimal orbital overlap occurs when the nucleophile attacks along the axis directly opposite the leaving group. This ensures a <strong>smooth transition state<\/strong> and effective bond formation.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Steric and Electronic Factors<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If the angle were anything other than 180\u00b0, the overlap between the nucleophile\u2019s lone pair and the carbon\u2019s antibonding orbital would be inefficient, leading to a slower or failed reaction.<\/li>\n\n\n\n<li>A smaller angle, such as <strong>90\u00b0 or 120\u00b0<\/strong>, would cause steric hindrance and reduced orbital alignment, making the reaction highly unfavorable.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h3>\n\n\n\n<p>For an SN2 reaction to proceed efficiently, the nucleophile must attack from exactly the opposite direction of the leaving group. This <strong>180\u00b0 approach<\/strong> ensures the best orbital alignment and results in a smooth transition state. Thus, the correct answer is <strong>(c) 180\u00b0.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In a SN2 reaction, what is the required angle for the reaction to occur? a) 90 b)120 c) 180 d) None of the above e) a and b The correct answer and explanation is : The correct answer is: c) 180 Explanation: An SN2 (Substitution Nucleophilic Bimolecular) reaction occurs in a single, concerted step where [&hellip;]<\/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-203949","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/203949","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=203949"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/203949\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=203949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=203949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=203949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}