Hexoses: Difference between revisions
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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 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 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. | 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. | ||
</StructureSection> | |||
<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>select all; label "%[chirality]"; | |||
background label [xffff00];</scriptWhenChecked> | |||
<scriptWhenUnchecked>select all; label off</scriptWhenUnchecked> | |||
<checked>false</checked> | |||
<text>contacts</text> | |||
</jmolCheckbox> | |||
</jmol> | |||
== Terms Defined in Wikipedia == | == Terms Defined in Wikipedia == | ||
