{"id":208490,"date":"2025-04-27T11:34:39","date_gmt":"2025-04-27T11:34:39","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=208490"},"modified":"2025-04-27T11:34:41","modified_gmt":"2025-04-27T11:34:41","slug":"indicate-whether-or-not-the-following-molecules-are-chiral-6","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/27\/indicate-whether-or-not-the-following-molecules-are-chiral-6\/","title":{"rendered":"Indicate whether or not the following molecules are chiral"},"content":{"rendered":"\n<p>Indicate whether or not the following molecules are chiral.<\/p>\n\n\n\n<p>1 3,3-dimethylheptane<br>2 2,3-dimethylheptane<br>3 2-methylheptane<br>4 3-methylheptane<br>5 4-methylheptane<\/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<h3 class=\"wp-block-heading\">1. <strong>3,3-Dimethylheptane<\/strong><\/h3>\n\n\n\n<p><strong>Not Chiral.<\/strong><br>This molecule has no chiral centers. In 3,3-dimethylheptane, the two methyl groups (\u2013CH\u2083) are attached to the same carbon at position 3. This creates a symmetry, meaning this carbon is not attached to four different groups. A chiral center requires four distinct substituents. Thus, the molecule is <strong>achiral<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>2,3-Dimethylheptane<\/strong><\/h3>\n\n\n\n<p><strong>Chiral.<\/strong><br>In 2,3-dimethylheptane, there is a chiral center at carbon 3. Carbon 3 is attached to a \u2013CH\u2082CH\u2083 group, a \u2013CH\u2083 group, a \u2013CH\u2082CH\u2083 group, and a \u2013H atom, making it attached to four different groups. This lack of symmetry creates chirality, meaning the molecule has a <strong>chiral center<\/strong> and can exist as two non-superimposable mirror images (enantiomers).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>2-Methylheptane<\/strong><\/h3>\n\n\n\n<p><strong>Not Chiral.<\/strong><br>In 2-methylheptane, carbon 2 is attached to a \u2013CH\u2083 group, a \u2013CH\u2082CH\u2083 group, a \u2013CH\u2082CH\u2083 group, and a \u2013H atom. Despite the substitution, carbon 2 is not attached to four distinct groups because two of them are ethyl groups (\u2013CH\u2082CH\u2083). As a result, this carbon is not a chiral center, and the molecule is <strong>achiral<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>3-Methylheptane<\/strong><\/h3>\n\n\n\n<p><strong>Not Chiral.<\/strong><br>In 3-methylheptane, the chiral center would be carbon 3, but this carbon is attached to a \u2013CH\u2082CH\u2083 group, a \u2013CH\u2083 group, and two hydrogens (because of symmetry in the molecule). Because carbon 3 is not attached to four distinct groups, the molecule is <strong>achiral<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong>4-Methylheptane<\/strong><\/h3>\n\n\n\n<p><strong>Not Chiral.<\/strong><br>In 4-methylheptane, the chiral center would be carbon 4, but carbon 4 is attached to a \u2013CH\u2082CH\u2083 group, a \u2013CH\u2083 group, and two hydrogens. This makes it <strong>not chiral<\/strong>, as the carbon is not attached to four distinct groups, leading to a lack of chirality.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chiral molecule<\/strong>: 2,3-dimethylheptane.<\/li>\n\n\n\n<li><strong>Achiral molecules<\/strong>: 3,3-dimethylheptane, 2-methylheptane, 3-methylheptane, and 4-methylheptane.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Indicate whether or not the following molecules are chiral. 1 3,3-dimethylheptane2 2,3-dimethylheptane3 2-methylheptane4 3-methylheptane5 4-methylheptane The correct answer and explanation is : 1. 3,3-Dimethylheptane Not Chiral.This molecule has no chiral centers. In 3,3-dimethylheptane, the two methyl groups (\u2013CH\u2083) are attached to the same carbon at position 3. This creates a symmetry, meaning this carbon is [&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-208490","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208490","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=208490"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208490\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}