In order to find the angle dihedral angle between two sets of atoms:

• Select Tools/Analysis/Dihedral Angles.

• Right click on each of the four atoms which you wish to use, and select the name of the atoms. The spaces next to Atom 1, Atom 2, Atom 3, and Atom 4 should now contain the names of your atoms.

• To find the correct angle, select your atoms according to the following diagram:

• Click Apply to display your dihedral angle measure in the terminal window.