{"id":233341,"date":"2025-06-13T04:56:07","date_gmt":"2025-06-13T04:56:07","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233341"},"modified":"2025-06-13T04:56:10","modified_gmt":"2025-06-13T04:56:10","slug":"determine-the-number-of-possible-stereoisomers-for-the-compound-below","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/13\/determine-the-number-of-possible-stereoisomers-for-the-compound-below\/","title":{"rendered":"Determine the number of possible stereoisomers for the compound below."},"content":{"rendered":"\n
Determine the number of possible stereoisomers for the compound below. OH Number of stereoisomers =<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n\n\n\n\n
A stereocenter<\/strong> (or chiral center) is a carbon atom bonded to four different groups. These centers allow for different spatial arrangements, which lead to stereoisomers<\/strong>.<\/p>\n\n\n\n
If a compound has n stereocenters<\/strong> and no internal plane of symmetry<\/strong>, then the maximum number of stereoisomers<\/strong> is given by:Number of stereoisomers=2n\\text{Number of stereoisomers} = 2^nNumber of stereoisomers=2n<\/p>\n\n\n\n
However, if the compound has an internal plane of symmetry<\/strong> (making it a meso compound), the actual number of stereoisomers will be less than 2\u207f<\/strong>, because meso compounds are achiral<\/strong> and do not have enantiomers.<\/p>\n\n\n\n\n\n\n\n
Step 2: Example Case Analysis<\/strong><\/h3>\n\n\n\n
Let\u2019s consider a molecule with two chiral centers<\/strong>. For example:<\/p>\n\n\n\n
This molecule has two stereocenters<\/strong>:<\/p>\n\n\n\n
\n
The second carbon<\/strong> (CH with OH and CH\u2083)<\/li>\n\n\n\n
The third carbon<\/strong> (CH with OH and CH\u2083)<\/li>\n<\/ul>\n\n\n\n
So, n=2n = 2n=2 stereocenters.<\/p>\n\n\n\n
By default, the number of stereoisomers is:22=42^2 = 422=4<\/p>\n\n\n\n
But now consider symmetry<\/strong>: if the molecule is symmetric and the two stereocenters are mirror images of each other, there is a possibility for a meso form<\/strong>, which is superimposable on its mirror image<\/strong>. This meso compound will reduce the total count<\/strong> by 1.<\/p>\n\n\n\n
Therefore, total stereoisomers = 22=42^2 = 422=4, but 1 of these is meso \u2192 only 3 unique stereoisomers<\/strong>.<\/p>\n\n\n\n\n\n\n\n
Conclusion<\/strong><\/h3>\n\n\n\n
To determine the number of stereoisomers:<\/p>\n\n\n\n
\n
Count the chiral centers (n).<\/strong><\/li>\n\n\n\n
Compute 2n2^n2n.<\/li>\n\n\n\n
Check for symmetry<\/strong> (meso compounds) to subtract duplicates.<\/li>\n<\/ol>\n\n\n\n\n\n\n\n
Final Answer Format:<\/h3>\n\n\n\n
Number of stereoisomers<\/strong> = depends on nnn and symmetry. For n = 2 chiral centers<\/strong> with symmetry<\/strong>, Answer: 3 stereoisomers<\/strong> (2 enantiomers + 1 meso compound).<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"
Determine the number of possible stereoisomers for the compound below. OH Number of stereoisomers = The Correct Answer and Explanation is: Step 1: Identify Stereocenters A stereocenter (or chiral center) is a carbon atom bonded to four different groups. These centers allow for different spatial arrangements, which lead to stereoisomers. If a compound has n […]<\/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-233341","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233341","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=233341"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233341\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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