{"id":1745,"date":"2024-03-02T16:45:20","date_gmt":"2024-03-02T16:45:20","guid":{"rendered":"https:\/\/cake.appscodestudio.com\/?p=1745"},"modified":"2024-03-02T16:45:21","modified_gmt":"2024-03-02T16:45:21","slug":"structural-arrangements-and-properties","status":"publish","type":"post","link":"https:\/\/cake.appscodestudio.com\/index.php\/2024\/03\/02\/structural-arrangements-and-properties\/","title":{"rendered":"Structural arrangements and properties"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Stereoisomerism<\/h2>\n\n\n\n<p>Studies by German chemist\u00a0Emil Fischer\u00a0in the late 19th century showed that carbohydrates, such as fructose and glucose, with the same\u00a0molecular\u00a0formulas but with different structural arrangements and properties (i.e., isomers) can be formed by relatively simple variations of their\u00a0spatial, or geometric, arrangements. This type of\u00a0isomerism, which is called\u00a0stereoisomerism, exists in all biological systems. Among carbohydrates, the simplest example is provided by the three-carbon aldose\u00a0sugar\u00a0glyceraldehyde. There is no way by which the structures of the two isomers of glyceraldehyde, which can be distinguished by the so-called\u00a0Fischer projection\u00a0formulas, can be made identical, excluding breaking and reforming the linkages, or bonds, of the\u00a0hydrogen\u00a0(\u2015H) and\u00a0hydroxyl\u00a0(\u2015OH) groups attached to the\u00a0carbon\u00a0at position 2. The isomers are, in fact, mirror images akin to right and left hands; the term\u00a0<em>enantiomorphism<\/em>\u00a0is frequently employed for such isomerism. The chemical and physical properties of enantiomers are identical except for the property of\u00a0optical rotation.<\/p>\n\n\n\n<p>Optical rotation is the rotation of the plane of\u00a0polarized\u00a0light.\u00a0Polarized\u00a0light is light that has been separated into two beams that vibrate at right angles to each other; solutions of substances that rotate the plane of polarization are said to be optically active, and the degree of rotation is called the optical rotation of the\u00a0solution. In the case of the isomers of glyceraldehyde, the magnitudes of the optical rotation are the same, but the direction in which the light is rotated\u2014generally designated as plus, or\u00a0<em>d<\/em>\u00a0for dextrorotatory (to the right), or as minus, or\u00a0<em>l<\/em>\u00a0for levorotatory (to the left)\u2014is opposite; i.e., a solution of\u00a0D-(<em>d<\/em>)-glyceraldehyde causes the plane of polarized light to rotate to the right, and a solution of\u00a0L-(<em>l<\/em>)-glyceraldehyde rotates the plane of polarized light to the left. Fischer\u00a0projection\u00a0formulas for the two isomers of glyceraldehyde are given below.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.britannica.com\/82\/16982-004-63FE674B\/Carbohydrates-Formulas-glyceraldehyde-isomers-D-L.jpg\" alt=\"Carbohydrates. Formulas for the two isomers of glyceraldehyde: D-(d)-glyceraldehyde and L-(l)-glyceraldehyde\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Stereoisomerism Studies by German chemist\u00a0Emil Fischer\u00a0in the late 19th century showed that carbohydrates, such as fructose and glucose, with the same\u00a0molecular\u00a0formulas but with different structural arrangements and properties (i.e., isomers) can be formed by relatively simple variations of their\u00a0spatial, or geometric, arrangements. This type of\u00a0isomerism, which is called\u00a0stereoisomerism, exists in all biological systems. Among carbohydrates, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1745","post","type-post","status-publish","format-standard","hentry","category-carbohydrates"],"Cooking_time":"","jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=1745"}],"version-history":[{"count":1,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1745\/revisions"}],"predecessor-version":[{"id":1746,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1745\/revisions\/1746"}],"wp:attachment":[{"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=1745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=1745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cake.appscodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=1745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}