{"id":226784,"date":"2025-06-05T15:00:58","date_gmt":"2025-06-05T15:00:58","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=226784"},"modified":"2025-06-05T15:01:00","modified_gmt":"2025-06-05T15:01:00","slug":"name-these-compounds","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/05\/name-these-compounds\/","title":{"rendered":"Name these compounds"},"content":{"rendered":"\n

Name these compounds: CH
(CH
)
CH
CH
CH
CH
| | | CH
CH
CH
CH CH
H
C
CH
| | H
C
CH
Name these compounds: CH
(CH
)
CH
CH
CH
CH
| | | CH
CH
CH
CH CH
H
C
CH
| | H
C
CH<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Let’s name the three organic compounds from the image:<\/p>\n\n\n\n

\n\n\n\n

1. CH\u2083(CH\u2082)\u2085CH\u2083<\/strong><\/h3>\n\n\n\n

Name:<\/strong> n-heptane<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
This is a straight-chain alkane with 7 carbon atoms. The general formula for an alkane is C\u2099H\u2082\u2099\u208a\u2082. Counting the carbon atoms:<\/p>\n\n\n\n

    \n
  • 1 carbon in CH\u2083 (methyl)<\/li>\n\n\n\n
  • 5 carbons in (CH\u2082)\u2085<\/li>\n\n\n\n
  • 1 carbon in the terminal CH\u2083<\/li>\n<\/ul>\n\n\n\n

    This adds up to 7 carbons \u2192 heptane<\/strong>.
    The “n-” prefix (normal) denotes a straight-chain alkane with no branching.<\/p>\n\n\n\n

    \n\n\n\n

    2. Branched hydrocarbon:<\/h3>\n\n\n\n
            CH3\n         |\nCH3\u2014CH\u2014CH\u2014CH\u2014CH3\n     |       |\n    CH3    CH3\n<\/code><\/pre>\n\n\n\n
    Name:<\/strong> 2,3,4-trimethylpentane<\/strong><\/p>\n\n\n\n
    Explanation:<\/strong><\/p>\n\n\n\n
      \n
    • Longest continuous carbon chain: 5 carbon atoms \u2192 pentane<\/strong><\/li>\n\n\n\n
    • Methyl groups (\u2013CH\u2083) are attached at positions 2, 3, and 4<\/li>\n\n\n\n
    • Number the chain from the end closest to a substituent to get the lowest set of locants: 2,3,4<\/li>\n\n\n\n
    • Three methyl groups \u2192 trimethyl<\/strong><\/li>\n<\/ul>\n\n\n\n
      Final name: 2,3,4-trimethylpentane<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      3. Four-carbon ring:<\/h3>\n\n\n\n
         CH2\u2014CH2\n  |       |\nCH2     CH2\n<\/code><\/pre>\n\n\n\n
      Name:<\/strong> cyclobutane<\/strong><\/p>\n\n\n\n
      Explanation:<\/strong>
      This structure is a closed ring with 4 carbon atoms, all single bonds \u2192 it’s a cycloalkane<\/strong>.<\/p>\n\n\n\n
        \n
      • 4 carbon atoms \u2192 butane<\/strong><\/li>\n\n\n\n
      • Ring structure \u2192 prefix cyclo-<\/strong><\/li>\n<\/ul>\n\n\n\n
        Final name: cyclobutane<\/strong><\/p>\n\n\n\n
        \n\n\n\n
        Summary Table:<\/h3>\n\n\n\n
        Compound Structure<\/th>Name<\/th><\/tr><\/thead>
        CH\u2083(CH\u2082)\u2085CH\u2083<\/td>n-heptane<\/td><\/tr>
        Branched chain with 3 methyl groups<\/td>2,3,4-trimethylpentane<\/td><\/tr>
        Four-carbon ring<\/td>cyclobutane<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \n\n\n\n
        Additional Explanation<\/h3>\n\n\n\n
        The naming of organic compounds follows IUPAC nomenclature<\/strong> rules. Alkanes are saturated hydrocarbons containing only single bonds. Naming them involves identifying the longest carbon chain<\/strong> and then naming and numbering any branches or substituents<\/strong>.<\/p>\n\n\n\n
          \n
        1. For n-heptane<\/strong>, the molecule is linear and unbranched. The base name “heptane” comes from the 7 carbon atoms, and “n-” means it’s the normal (straight) form. No prefixes are needed beyond “n-” since there are no branches.<\/li>\n\n\n\n
        2. The second compound is a branched alkane<\/strong>. The longest chain of carbon atoms is selected (pentane), and the branches (methyl groups) are identified and numbered to give the lowest possible numbers<\/strong>. This ensures the name is unique and systematic. Since there are methyl groups on carbons 2, 3, and 4, the name becomes 2,3,4-trimethylpentane<\/strong>.<\/li>\n\n\n\n
        3. The third compound is a cyclic hydrocarbon<\/strong>, specifically a cycloalkane. The ring contains four carbon atoms, all bonded with single bonds, making it cyclobutane<\/strong>. The “cyclo-” prefix indicates a ring, while “butane” indicates four carbons.<\/li>\n<\/ol>\n\n\n\n
          Understanding these naming rules helps chemists clearly describe molecular structures in a consistent, universally understood way.<\/p>\n\n\n\n
          \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
          Name these compounds: CH(CH)CHCHCHCH| | | CHCHCHCH CHHCCH| | HCCHName these compounds: CH(CH)CHCHCHCH| | | CHCHCHCH CHHCCH| | HCCH The Correct Answer and Explanation is: Let’s name the three organic compounds from the image: 1. CH\u2083(CH\u2082)\u2085CH\u2083 Name: n-heptane Explanation:This is a straight-chain alkane with 7 carbon atoms. The general formula for an alkane is C\u2099H\u2082\u2099\u208a\u2082. […]<\/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-226784","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226784","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=226784"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226784\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=226784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=226784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=226784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}