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document Anti Conformation
Description given to two substitutents attached to adjacent atoms when their bonds are at 180 degrees with respect to each other.  Below are generic representations of anti conformations in both a Newman projection and a wedge-and-dash drawings.   This idea also explains why...
31 Jan, 2011 Comments: 0
document Conformational Analysis of Cyclohexane
VISIT THE MODELS&# 160;360 SITE AT THE CHEMED DL! (search for cyclohexane to get started, is that model a chair?)   Conformations of cyclohexane provide a much more complex study on how rotation around C-C bonds can lead to structures with differing potential energies. ...
18 Sep, 2012 Comments: 0
document Conformational Analysis of Higher Alkanes
VISIT THE MODELS 0;360 SITE AT THE CHEMED DL! (search for butane to get started, is that model eclipsed, anti, or gauche around the C2-C3 bond?)   In order to fully understand conformations of cyclohexane and greater alkanes, one must be able to analyze and determine the...
26 Aug, 2011 Comments: 0
document Gauche Conformation
Description given to two substitutents attached to adjacent atoms when their bonds are at 60o with respect to each other. Below are generic representations of gauche conformations in both Newman projects and wedge-and-dash drawings. Gauche conformations are a form of staggered conformations,...
16 Mar, 2011 Comments: 0
document Eclipsed Conformation
Eclipsed conformations of alkanes usually represent the highest energy conformation where the bonds on adjacent atoms are exactly aligned with each other, thereby increasing steric/torsional strain. Below are representations of eclipsed conformations in both Newman projections and...
12 Jul, 2011 Comments: 0
document Newman Projections
Check out this interactive stereochemistry tutorial on the ChemEdDL   Newman projections are simply another way to draw organic molecules that specifically helps in visualizing conformational isomers.  These projections are drawn by looking directly along a particular bond in the ...
25 Jan, 2013 Comments: 0
document Sawhorse Diagram
Check out this interactive stereochemistry tutorial on the ChemEdDL Sawhorse diagrams are similar to wedge-dash diagrams, but without trying to use "shading" to denote the perspective. The representation to the right of propane has been drawn so that we are looking at the molecule, which is...
25 Jan, 2013 Comments: 0
document Staggered Conformation
A low energy conformation where the bonds on adjacent atoms bisect each other, maximizing the separation and increasing stability. Below are generic representations of staggered conformations in both Newman projects and wedge-and-dash drawings.  Staggered conformations include both...
16 Mar, 2011 Comments: 0
document Syn Conformation
Syn conformation is a descriptive term given to two substituents attached to adjacent atoms when their bonds are at 0o with respect to each other (the bond angle refers to the C-X and C-Y bonds 0o apart).  Another way to describe bonds that are at 0o is to say they are eclipsed.  Notice...
20 Feb, 2013 Comments: 0
document Torsional Angle
Angle between C-X and C-Y bonds in a X-C-C-Y system when viewed along the C-C bond. Rotation about the C-C bond will change this torsional angle.  This is also known as a dihedral angle.
16 Mar, 2011 Comments: 0

Department of Chemistry & Chemical Biology