Hexoses: Difference between revisions

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== Fructose ==

The applet on the right shows <scene name='Hexoses/Open_fructose/3'>D-fructose</scene> in a conformation in which the oxygen of C-5 is in position to react with C-2, the carbonyl carbon, forming a hemiketal<ref>[http://en.wikipedia.org/wiki/Hemiacetal Hemiketal]</ref>. As in the case of glucose forming a hemiacetal, the carbonyl carbon becomes a chiral carbon and an anomeric carbon. The two possible anomers are called <scene name='Hexoses/Alpha_fructose/3'>α-D-fructofuranose</scene> <ref>[http://en.wikipedia.org/wiki/Furanose Furanose]</ref> and <scene name='Hexoses/Beta_fructose/2'>β-D- fructofuranose</scene>~~. The α and β furanoses are shown below~~.

The applet on the right shows <scene name='Hexoses/Open_fructose/3'>D-fructose</scene> in a conformation in which the oxygen of C-5 is in position to react with C-2, the carbonyl carbon, forming a hemiketal<ref>[http://en.wikipedia.org/wiki/Hemiacetal Hemiketal]</ref>. As in the case of glucose forming a hemiacetal, the carbonyl carbon becomes a chiral carbon and an anomeric carbon. The two possible anomers are called <scene name='Hexoses/Alpha_fructose/3'>α-D-fructofuranose</scene> <ref>[http://en.wikipedia.org/wiki/Furanose Furanose]</ref> and <scene name='Hexoses/Beta_fructose/2'>β-D- fructofuranose</scene>.

The α anomer ~~on the left~~ is shown with an edge-on-view, with the anomeric carbon (C-2) on the right side of the structure and with its hydroxyl group projecting down. C-1 is not part of the five membered ring and projects above the ring. Toggle off the spin of the β anomer on the right and rotate the structure so that it has a position similar to that of the α anomer. Confirm that the configuration about the anomeric carbon of the β anomer is different from that of the α anomer.

The α anomer is shown with an edge-on-view, with the anomeric carbon (C-2) on the right side of the structure and with its hydroxyl group projecting down. C-1 is not part of the five membered ring and projects above the ring.

~~{{clear}}~~

== Terms Defined in Wikipedia ==

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 == Fructose ==
-The applet on the right shows <scene name='Hexoses/Open_fructose/3'>D-fructose</scene> in a conformation in which the oxygen of C-5 is in position to react with C-2, the carbonyl carbon, forming a hemiketal<ref>[http://en.wikipedia.org/wiki/Hemiacetal Hemiketal]</ref>. As in the case of glucose forming a hemiacetal, the carbonyl carbon becomes a chiral carbon and an anomeric carbon. The two possible anomers are called <scene name='Hexoses/Alpha_fructose/3'>α-D-fructofuranose</scene> <ref>[http://en.wikipedia.org/wiki/Furanose Furanose]</ref> and <scene name='Hexoses/Beta_fructose/2'>β-D- fructofuranose</scene>. The α and β furanoses are shown below.
+The applet on the right shows <scene name='Hexoses/Open_fructose/3'>D-fructose</scene> in a conformation in which the oxygen of C-5 is in position to react with C-2, the carbonyl carbon, forming a hemiketal<ref>[http://en.wikipedia.org/wiki/Hemiacetal Hemiketal]</ref>. As in the case of glucose forming a hemiacetal, the carbonyl carbon becomes a chiral carbon and an anomeric carbon. The two possible anomers are called <scene name='Hexoses/Alpha_fructose/3'>α-D-fructofuranose</scene> <ref>[http://en.wikipedia.org/wiki/Furanose Furanose]</ref> and <scene name='Hexoses/Beta_fructose/2'>β-D- fructofuranose</scene>.
-The α anomer on the left is shown with an edge-on-view, with the anomeric carbon (C-2) on the right side of the structure and with its hydroxyl group projecting down. C-1 is not part of the five membered ring and projects above the ring.  Toggle off the spin of the β anomer on the right and rotate the structure so that it has a position similar to that of the α anomer. Confirm that the configuration about the anomeric carbon of the β anomer is different from that of the α anomer.
+The α anomer is shown with an edge-on-view, with the anomeric carbon (C-2) on the right side of the structure and with its hydroxyl group projecting down. C-1 is not part of the five membered ring and projects above the ring.
-{{clear}}
 == Terms Defined in Wikipedia ==