Select the correct IUPAC name for the branched alcohol.<\/p>\n\n\n\n
The IUPAC name of the alcohol is:<\/p>\n\n\n\n
2-ethyl-4-methyl-5-propyl-1-hexanol
2-ethyl-4,5-dimethyl-1-octanol
4,5-dimethyl-7-propyl-8-octanol
3-hydroxymethyl-5,6-dimethylnonane<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct IUPAC name is: To determine the correct IUPAC name for a branched alcohol, we follow the IUPAC nomenclature rules:<\/p>\n\n\n\n In IUPAC nomenclature for alcohols, the longest continuous carbon chain must<\/strong> include the hydroxyl (-OH)<\/strong> group. In this case, the correct name “2-ethyl-4,5-dimethyl-1-octanol” suggests the parent chain is octane<\/strong> (8 carbon atoms) and the OH group is on carbon 1<\/strong>.<\/p>\n\n\n\n Number the carbon atoms in such a way that the hydroxyl group gets the lowest possible number<\/strong>. That\u2019s why the OH is at position 1<\/strong> in “1-octanol”.<\/p>\n\n\n\n So the main chain is:<\/p>\n\n\n\n CH\u2083\u2013CH(Et)\u2013CH\u2082\u2013CH(Me)\u2013CH(Me)\u2013CH\u2082\u2013CH\u2082\u2013CH\u2082OH<\/strong><\/p>\n\n\n\n Which gives us the following numbering:<\/p>\n\n\n\n This matches “2-ethyl-4,5-dimethyl-1-octanol”<\/strong><\/p>\n\n\n\n “2-ethyl-4,5-dimethyl-1-octanol”<\/strong> correctly follows all IUPAC rules: Hence, it is the correct IUPAC name.<\/p>\n","protected":false},"excerpt":{"rendered":" Select the correct IUPAC name for the branched alcohol. The IUPAC name of the alcohol is: 2-ethyl-4-methyl-5-propyl-1-hexanol2-ethyl-4,5-dimethyl-1-octanol4,5-dimethyl-7-propyl-8-octanol3-hydroxymethyl-5,6-dimethylnonane The Correct Answer and Explanation is: The correct IUPAC name is:2-ethyl-4,5-dimethyl-1-octanol Explanation: To determine the correct IUPAC name for a branched alcohol, we follow the IUPAC nomenclature rules: Step 1: Identify the Longest Carbon Chain Containing the OH […]<\/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-217139","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/217139","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=217139"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/217139\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=217139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=217139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=217139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
2-ethyl-4,5-dimethyl-1-octanol<\/strong><\/p>\n\n\n\n
\n\n\n\nExplanation:<\/strong><\/h3>\n\n\n\n
\n\n\n\nStep 1: Identify the Longest Carbon Chain Containing the OH Group<\/strong><\/h3>\n\n\n\n
\n\n\n\nStep 2: Number the Carbon Chain<\/strong><\/h3>\n\n\n\n
\n
\n\n\n\nStep 3: Name the Substituents and Their Positions<\/strong><\/h3>\n\n\n\n
\n
\n\n\n\nWhy the Other Options Are Incorrect:<\/strong><\/h3>\n\n\n\n
\n
\u2192 Parent chain is only 6 carbons (hexanol), even though a longer chain exists. Violates Rule 1.<\/li>\n\n\n\n
\u2192 The OH group is on carbon 8, which is not the lowest possible number. Should be carbon 1.<\/li>\n\n\n\n
\u2192 The \u2013OH group is not on the main chain; it’s in a substituent (hydroxymethyl). Less preferred.<\/li>\n<\/ol>\n\n\n\n
\n\n\n\nConclusion:<\/strong><\/h3>\n\n\n\n
\u2714 Longest chain includes OH
\u2714 OH has the lowest possible number
\u2714 Substituents are correctly named and located<\/p>\n\n\n\n