{"id":7341,"date":"2024-12-29T12:15:57","date_gmt":"2024-12-29T12:15:57","guid":{"rendered":"https:\/\/workhouse.sweetdishy.com\/?p=7341"},"modified":"2024-12-29T12:15:58","modified_gmt":"2024-12-29T12:15:58","slug":"what-are-aldehydes","status":"publish","type":"post","link":"https:\/\/workhouse.sweetdishy.com\/index.php\/2024\/12\/29\/what-are-aldehydes\/","title":{"rendered":"What are Aldehydes?"},"content":{"rendered":"\n
\n

Aldehydes are organic compounds which have the functional group -CHO.<\/p>\n<\/blockquote>\n\n\n\n

These carbonyl compounds consist of a central carbonyl carbon doubly bonded to an oxygen and single bonded to the R group (any alkyl group) and a hydrogen atom.
<\/p>\n\n\n\n

Preparation of Aldehydes<\/h3>\n\n\n\n

Acid chlorides are reduced to aldehydes with hydrogen in the presence of palladium catalyst spread on barium sulfate.<\/p>\n\n\n\n

This reaction is known as Rosenmund reduction and is mostly used for the preparation of aromatic aldehydes. This reaction cannot be used for the preparation of ketones and formaldehyde.
<\/a><\/p>\n\n\n\n

Properties of Aldehydes<\/h3>\n\n\n\n
    \n
  • The structure of aldehydes shows a sp2\u00a0<\/sup>hybridized central carbon which is doubly connected to oxygen and has a single bond with hydrogen.<\/li>\n\n\n\n
  • Small aldehydes are quite soluble in water.<\/li>\n\n\n\n
  • Formaldehyde and acetaldehyde are great examples of this. These two aldehydes are quite important industrially.<\/li>\n\n\n\n
  • Aldehydes generally exhibit a tendency to undergo oligomerization or polymerization.<\/li>\n\n\n\n
  • The carbonyl centre of the aldehyde has an electron-withdrawing nature. Therefore, the aldehyde group can be considered somewhat polar.<\/li>\n<\/ul>\n\n\n\n

    Nomenclature of Aldehydes<\/h3>\n\n\n\n
      \n
    • Acyclic and Aliphatic Aldehydes are named after their longest carbon chain along with the \u201c-al\u201d suffix. For example, CH3<\/sub>CH3<\/sub>CH2<\/sub>CHO is called butanal since it has four carbons in the chain.<\/li>\n\n\n\n
    • When the aldehyde functional group is added to a ring, the \u201c-carbaldehyde\u201d suffix must be used. For example, C6<\/sub>H11<\/sub>CHO is called cyclohexanecarbaldehyde.<\/li>\n\n\n\n
    • In the case of natural compounds or carboxylic acids, \u201c-oxo\u201d is used as a prefix to highlight the carbon which is a part of the aldehyde functional group. For example, (CHO)-CH2<\/sub>COOH is called 3-oxopropanoic acid.<\/li>\n<\/ul>\n\n\n\n

      Some common and IUPAC names for some aldehydes are tabulated below.<\/p>\n\n\n\n

      Formula<\/strong><\/td>Common name<\/strong><\/td>IUPAC name<\/strong><\/td><\/tr>
      HCHO<\/td>Formaldehyde<\/td>Methanal<\/td><\/tr>
      CH3<\/sub>CHO<\/td>Acetaldehyde<\/td>Ethanal<\/td><\/tr>
      CH3<\/sub>-CH(CH3<\/sub>)-CHO<\/td>Isobutyraldehyde<\/td>2-Methylpropanal<\/td><\/tr>
      CH3<\/sub>-CH=CH-CHO<\/td>Crotonaldehyde<\/td>2-Butenal<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Uses of Aldehydes<\/h3>\n\n\n\n
        \n
      • Formaldehyde is used as a disinfectant and as a preservative for biological specimens.<\/li>\n\n\n\n
      • Aldehyde is used for silvering mirrors.<\/li>\n\n\n\n
      • Formaldehyde is used for the production of a variety of plastic and resins.<\/li>\n\n\n\n
      • Benzaldehyde is used in perfumery and in the dye industry<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

        Aldehydes are organic compounds which have the functional group -CHO. These carbonyl compounds consist of a central carbonyl carbon doubly bonded to an oxygen and single bonded to the R group (any alkyl group) and a hydrogen atom. Preparation of Aldehydes Acid chlorides are reduced to aldehydes with hydrogen in the presence of palladium catalyst […]<\/p>\n","protected":false},"author":1,"featured_media":7336,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[760],"tags":[],"class_list":["post-7341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aldehydes-ketones-and-carboxylic-acids"],"jetpack_featured_media_url":"https:\/\/workhouse.sweetdishy.com\/wp-content\/uploads\/2024\/12\/skeleton.png","_links":{"self":[{"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/posts\/7341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/comments?post=7341"}],"version-history":[{"count":1,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/posts\/7341\/revisions"}],"predecessor-version":[{"id":7342,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/posts\/7341\/revisions\/7342"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/media\/7336"}],"wp:attachment":[{"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/media?parent=7341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/categories?post=7341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/workhouse.sweetdishy.com\/index.php\/wp-json\/wp\/v2\/tags?post=7341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}