{"id":192967,"date":"2025-02-18T14:16:46","date_gmt":"2025-02-18T14:16:46","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=192967"},"modified":"2025-02-18T14:16:49","modified_gmt":"2025-02-18T14:16:49","slug":"draw-the-two-chair-conformations-of-each-of-the-following-substituted-cyclohexanes","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/18\/draw-the-two-chair-conformations-of-each-of-the-following-substituted-cyclohexanes\/","title":{"rendered":"Draw the two chair conformations of each of the following substituted cyclohexanes"},"content":{"rendered":"\n<p>Draw the two chair conformations of each of the following substituted cyclohexanes. In each case, label the more stable conformation.<\/p>\n\n\n\n<p>(a) cis-1-ethyl-2-methylcyclohexane<\/p>\n\n\n\n<p>(b) trans-1,2-diethylcyclohexane<\/p>\n\n\n\n<p>(c) cis-1-ethyl-4-isopropylcyclohexane<\/p>\n\n\n\n<p>(d) trans-1-ethyl-4-methylcyclohexane<\/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>To draw the two chair conformations for each substituted cyclohexane, we first need to understand how chair conformations work. Cyclohexane adopts a chair form that minimizes steric strain by placing bulky substituents in equatorial positions, which are more favorable than axial positions because axial substituents cause 1,3-diaxial interactions. The most stable conformation for a substituted cyclohexane places the larger substituents in the equatorial positions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(a) <strong>cis-1-ethyl-2-methylcyclohexane<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure Explanation:<\/strong><\/li>\n\n\n\n<li>In the <em>cis<\/em> conformation, both substituents (ethyl and methyl) are on the same side of the ring.<\/li>\n\n\n\n<li>For the most stable chair form, the ethyl group (larger) should occupy the equatorial position, and the methyl group (smaller) should be axial.<\/li>\n\n\n\n<li>The less stable chair form would have the ethyl group axial and the methyl group equatorial.<\/li>\n\n\n\n<li><strong>Most stable conformation:<\/strong> The chair where the ethyl group is in the equatorial position and the methyl group is axial.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(b) <strong>trans-1,2-diethylcyclohexane<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure Explanation:<\/strong><\/li>\n\n\n\n<li>In the <em>trans<\/em> conformation, the two ethyl groups are on opposite sides of the ring.<\/li>\n\n\n\n<li>For the most stable conformation, each ethyl group should be placed in the equatorial position to avoid steric hindrance.<\/li>\n\n\n\n<li>The less stable chair would have the ethyl groups in axial positions.<\/li>\n\n\n\n<li><strong>Most stable conformation:<\/strong> The chair where both ethyl groups are equatorial.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(c) <strong>cis-1-ethyl-4-isopropylcyclohexane<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure Explanation:<\/strong><\/li>\n\n\n\n<li>In the <em>cis<\/em> conformation, both the ethyl and isopropyl groups are on the same side of the ring.<\/li>\n\n\n\n<li>For the most stable conformation, the larger isopropyl group should occupy the equatorial position to reduce steric strain, while the ethyl group would be placed in the axial position.<\/li>\n\n\n\n<li>The less stable chair would have the ethyl group axial and the isopropyl group axial.<\/li>\n\n\n\n<li><strong>Most stable conformation:<\/strong> The chair where the isopropyl group is equatorial, and the ethyl group is axial.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(d) <strong>trans-1-ethyl-4-methylcyclohexane<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structure Explanation:<\/strong><\/li>\n\n\n\n<li>In the <em>trans<\/em> conformation, the ethyl and methyl groups are on opposite sides of the ring.<\/li>\n\n\n\n<li>The more stable conformation places the larger ethyl group in the equatorial position, and the methyl group will be placed in the axial position.<\/li>\n\n\n\n<li>The less stable chair would have the ethyl group in the axial position and the methyl group in the equatorial position.<\/li>\n\n\n\n<li><strong>Most stable conformation:<\/strong> The chair where the ethyl group is equatorial, and the methyl group is axial.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>In all cases, the more stable conformation is the one where bulky substituents are placed in the equatorial position. This reduces steric hindrance from 1,3-diaxial interactions, leading to a lower energy state for the molecule.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Draw the two chair conformations of each of the following substituted cyclohexanes. In each case, label the more stable conformation. (a) cis-1-ethyl-2-methylcyclohexane (b) trans-1,2-diethylcyclohexane (c) cis-1-ethyl-4-isopropylcyclohexane (d) trans-1-ethyl-4-methylcyclohexane The Correct Answer and Explanation is : To draw the two chair conformations for each substituted cyclohexane, we first need to understand how chair conformations work. Cyclohexane [&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-192967","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192967","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=192967"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192967\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=192967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=192967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=192967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}