{"id":257203,"date":"2025-07-16T19:42:25","date_gmt":"2025-07-16T19:42:25","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=257203"},"modified":"2025-07-16T19:42:28","modified_gmt":"2025-07-16T19:42:28","slug":"there-are-actually-three-constitutional-isomers-with-the-molecular-formula-we-have-seen-two-of-them-in-propyl-alcohol-and-isopropyl-alcohol","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/16\/there-are-actually-three-constitutional-isomers-with-the-molecular-formula-we-have-seen-two-of-them-in-propyl-alcohol-and-isopropyl-alcohol\/","title":{"rendered":"There are actually three constitutional isomers with the molecular formula\u00a0\u00a0We have seen two of them in propyl alcohol and isopropyl alcohol."},"content":{"rendered":"\n<pre id=\"preorder-ask-header-text\" class=\"wp-block-preformatted\">There are actually three constitutional isomers with the molecular formula&nbsp;&nbsp;We have seen two of them in propyl alcohol and isopropyl alcohol. Write a dash formula for the third isomer.<\/pre>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The molecular formula for three constitutional isomers of C\u2083H\u2088O is C\u2083H\u2088O. The two isomers you&#8217;ve mentioned, <strong>propyl alcohol<\/strong> and <strong>isopropyl alcohol<\/strong>, are part of this family. The third isomer can be a compound with a different functional group or connectivity but still maintains the formula C\u2083H\u2088O.<\/p>\n\n\n\n<p>The third constitutional isomer of C\u2083H\u2088O is <strong>cyclopropanol<\/strong>. It contains a three-membered ring with an -OH group attached to one of the carbon atoms in the ring.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dash Formula for Cyclopropanol:<\/h3>\n\n\n\n<p>Here\u2019s how the dash formula would look for <strong>cyclopropanol<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">mathematicaCopyEdit<code>      H\n      |\nH - C - C - C - OH\n      |\n      H\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cyclopropanol<\/strong> consists of a three-membered cyclopropane ring with a hydroxyl group (-OH) attached to one of the carbon atoms.<\/li>\n\n\n\n<li>The three carbon atoms form a triangle (cyclopropane), and one of them is bonded to the hydroxyl group.<\/li>\n\n\n\n<li>Each of the remaining two carbon atoms is bonded to two hydrogens, and the hydroxyl group is placed on one of the carbons, making it an alcohol.<\/li>\n<\/ul>\n\n\n\n<p>This is different from <strong>propyl alcohol<\/strong> and <strong>isopropyl alcohol<\/strong>, where the alcohol group (-OH) is attached to a primary or secondary carbon chain.<\/p>\n\n\n\n<p>The other two isomers, <strong>propyl alcohol<\/strong> (CH\u2083CH\u2082CH\u2082OH) and <strong>isopropyl alcohol<\/strong> (CH\u2083CHOHCH\u2083), differ in the position of the -OH group along the carbon chain.<\/p>\n\n\n\n<p>Thus, cyclopropanol represents the third constitutional isomer with the formula C\u2083H\u2088O, with a unique structure compared to the alcohols.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner6-719.jpeg\" alt=\"\" class=\"wp-image-257204\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>There are actually three constitutional isomers with the molecular formula&nbsp;&nbsp;We have seen two of them in propyl alcohol and isopropyl alcohol. Write a dash formula for the third isomer. The Correct Answer and Explanation is: The molecular formula for three constitutional isomers of C\u2083H\u2088O is C\u2083H\u2088O. The two isomers you&#8217;ve mentioned, propyl alcohol and isopropyl [&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-257203","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/257203","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=257203"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/257203\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=257203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=257203"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=257203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}