{"id":193015,"date":"2025-02-18T19:34:31","date_gmt":"2025-02-18T19:34:31","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=193015"},"modified":"2025-02-18T19:34:34","modified_gmt":"2025-02-18T19:34:34","slug":"given-the-planar-trisubstituted-cyclohexane-below","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/18\/given-the-planar-trisubstituted-cyclohexane-below\/","title":{"rendered":"Given the planar trisubstituted cyclohexane below"},"content":{"rendered":"\n<p><br>Given the planar trisubstituted cyclohexane below, fill in all boxes (with H, F,Cl or Br) to complete the two possible cyclohexane chair conformations.<br>Which is the more stable conformer?<br>a)Chair1<br>b) Chair2<br>\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-956.png\" alt=\"\" class=\"wp-image-193017\"\/><\/figure>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The stability of the two chair conformations of trisubstituted cyclohexane depends on <strong>steric hindrance<\/strong> and <strong>1,3-diaxial interactions<\/strong>. The <strong>more stable chair conformation<\/strong> will have the <strong>bulkier groups in the equatorial positions<\/strong> to minimize steric strain.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 1: Identifying Substituents<\/strong><\/h3>\n\n\n\n<p>From the image, the given substituents on the planar structure are <strong>H, F, Cl, and Br<\/strong>. Since <strong>Br<\/strong> is the largest, followed by <strong>Cl<\/strong>, then <strong>F<\/strong>, and finally <strong>H<\/strong> (the smallest), we need to place them in the chair conformation appropriately.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 2: Drawing the Two Chair Conformations<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Chair 1:<\/strong> The substituents are positioned based on the axial\/equatorial flips. One possibility has <strong>Br in an axial position<\/strong>, which is unfavorable due to its large size.<\/li>\n\n\n\n<li><strong>Chair 2:<\/strong> The substituents are flipped, placing <strong>Br in an equatorial position<\/strong>, reducing steric strain.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 3: Determining Stability<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Large groups prefer equatorial positions<\/strong> to reduce <strong>1,3-diaxial interactions<\/strong> (steric strain with axial hydrogens).<\/li>\n\n\n\n<li><strong>Bromine (Br)<\/strong> is the largest halogen, so it should ideally be <strong>equatorial<\/strong> for maximum stability.<\/li>\n\n\n\n<li><strong>Fluorine (F)<\/strong> is the smallest and can tolerate axial positioning better than Cl or Br.<\/li>\n\n\n\n<li><strong>Chlorine (Cl)<\/strong> is intermediate in size but is still better suited in an equatorial position if possible.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion: More Stable Conformer<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>more stable conformer<\/strong> will have <strong>Br and Cl in equatorial positions<\/strong>, which occurs in <strong>Chair 2<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the answer is:<br><strong>(b) Chair 2 is the more stable conformer.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Given the planar trisubstituted cyclohexane below, fill in all boxes (with H, F,Cl or Br) to complete the two possible cyclohexane chair conformations.Which is the more stable conformer?a)Chair1b) Chair2\u00a0 The correct answer and explanation is: The stability of the two chair conformations of trisubstituted cyclohexane depends on steric hindrance and 1,3-diaxial interactions. The more stable [&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-193015","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/193015","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=193015"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/193015\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=193015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=193015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=193015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}