Stereochemistry

Stereochemistry refers to the three dimensional arrangement of atoms in molecules, especially those aspects that go beyond the connectivity (which atoms are connected to each other) captured in a Lewis structure. Two molecules that are mirror images of each other (enantiomers) differ in stereochemistry. Another common example are cis and trans double bonds, such as in fatty acids.

spinqualitylabelsall models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D

spinqualitylabelsall models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D

<jmol>

 <jmolButton>
   <target>A</target>
   <script>load $"(R) 2-butanol"; script applet B @{"load $2-butanol"};</script>
   <text>2-Butanol</text>
 </jmolButton>

<jmol>

 <jmolButton>
   <target>A</target>
   <script>load $"cis-butene"; script applet B @{"load $trans-butene"};</script>
   <text>Butene</text>
 </jmolButton>

<jmol>

 <jmolButton>
   <target>A</target>
   <script>load $"D-Alanine"; script applet B @{"load $alanine"};</script>
   <text>Alanine enantiomers</text>
 </jmolButton>

<jmol>

 <jmolButton>
   <target>A</target>
   <script>load $erythrose; script applet B @{"load $threose"};</script>
   <text>Erythrose vs. Threose</text>
 </jmolButton>

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Karsten Theis