6.6 Bonds, Angles and torsions

With VEGA ZZ it's possible to change interactively bonds, angles and torsions defined by the Selection Tool. To open the Change bond/angle/torsion dialog, select the Edit -> Change -> Bond/Angle/Torsion item in the main menu.

Change angle/torsion

To select new bonds, angles and torsions, you can open the Selection Tool clicking the Edit button. The Bond/Angle/Torsion box shows the selected angles and torsions that can be changed one at a time, selecting one and pushing the Change button. This is a dynamic button as explained for the 3D Controls dialog box. In the Angle value or Torsion value field, it's possible specify the angle or the torsion value.

When you change the bond length, the Default length button and the Move all checkbox are active. Clicking the first the former, the bond length is automatically set to default value (e.g.  C-H bond is set to 1.14 Å) and checking the latter, when you change the bond length, the whole substructure connected trough the bond is moved instead of the single atom. To revert to the initial value, use the undo function and to close the dialog, press the Done button.