Correct Answer:<\/strong> Explanation<\/strong><\/p>\n\n\n\n This is a classic example of a Diels\u2013Alder cycloaddition reaction<\/strong>, which is a [4+2] cycloaddition between a conjugated diene and a dienophile. In this case, anthracene<\/strong> acts as the diene. Anthracene is an aromatic hydrocarbon made of three fused benzene rings. The 9 and 10 positions of anthracene are the most reactive for Diels\u2013Alder reactions because forming a new six-membered ring at these positions preserves aromaticity in the outer rings while allowing temporary loss of aromaticity in the central ring.<\/p>\n\n\n\n Maleic anhydride<\/strong> is a strong dienophile due to the presence of two electron-withdrawing carbonyl groups. These groups pull electron density away from the double bond, making it more reactive towards electron-rich dienes such as anthracene.<\/p>\n\n\n\n The reaction typically takes place in a non-polar solvent<\/strong> such as xylene<\/strong>, and refluxing<\/strong> the mixture for about 30 minutes<\/strong> provides the energy needed to drive the reaction to completion. Under these conditions, the diene and dienophile react to form 9,10-dihydroanthracene-9,10-\u03b1,\u03b2-succinic anhydride<\/strong>, where a new six-membered ring is formed and the central ring of anthracene becomes non-aromatic.<\/p>\n\n\n\n The product is a bicyclic compound<\/strong> with an attached succinic anhydride group. It is a solid at room temperature and has a relatively high melting point around 260\u00b0C<\/strong>, indicating strong intermolecular forces and stability due to its rigid structure and potential for hydrogen bonding through the anhydride group.<\/p>\n\n\n\n This reaction is widely used in organic synthesis to form complex cyclic systems in a predictable and stereospecific manner, and it is commonly demonstrated in undergraduate chemistry labs.<\/p>\n\n\n\n Xylenes reflux, 30 mins Anthracene Maleic anhydride until 9,10-dihydroanthracene-9,10-a,B-succinic anhydride Melting point 260\u00c2\u00b0C The Correct Answer and Explanation is: Correct Answer:The reaction described is a Diels\u2013Alder reaction between anthracene and maleic anhydride in xylene under reflux to form 9,10-dihydroanthracene-9,10-\u03b1,\u03b2-succinic anhydride, which has a melting point around 260\u00b0C. Explanation This is a classic example of a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-37293","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/37293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=37293"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/37293\/revisions"}],"predecessor-version":[{"id":37301,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/37293\/revisions\/37301"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=37293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=37293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=37293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
The reaction described is a Diels\u2013Alder reaction<\/strong> between anthracene<\/strong> and maleic anhydride<\/strong> in xylene under reflux<\/strong> to form 9,10-dihydroanthracene-9,10-\u03b1,\u03b2-succinic anhydride<\/strong>, which has a melting point around 260\u00b0C<\/strong>.<\/p>\n\n\n\n
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