Basic VSEPR

Investigate molecular geometries using VSEPR rules.

Task

Build and optimize the geometry of simple molecules to illustrate VSEPR theory.

• For organic-type molecules, use the MMFF94 forcefield.

Examples: methane, water, ammonia, etc.

• For octahedral-based geometries, use the UFF forcefield which is optimized for all elements.

Examples: SF₆, IF₅, XeF₄, etc.

• Try even 7, 8, or 9 atoms around a central metal - how do the VSEPR rules extend beyond octahedral molecules?

See also

Organic Hybridization

Further reading

VSEPR theory (wikipedia)

Warning

Geometries derived from the trigonal bipyramidal geometry are not currently reliable.

Tip

When using the Draw tool, you may wish to uncheck the “Adjust Hydrogens” box.