How to draw orbitals on a structure

Steps

1. Draw the structure, for example ethene (press / and type ethene).

2. Press O for the Orbitals tool. Its options appear above the toolbar.

   

3. Pick an orbital with its number key, then click an atom. For π bond (8), click the bond instead.

   

The orbitals

Key	Orbital	Places
1	p orbital	One p orbital standing on the atom. The filled lobe is its phase
2	sp³	One hybrid, pointing to the open side of the atom. Drag to aim it
3	sp²	One hybrid, a little fatter than sp³
4	sp	One hybrid, the fattest (most s character)
5	sp³ set	Four hybrids, tetrahedral, in perspective: one toward you, one away
6	sp² set	Three hybrids at 120° and the leftover p orbital, for alkenes and carbonyls
7	sp set	Two hybrids at 180° and the two leftover p orbitals, for an alkyne carbon
8	π bond	Two parallel p orbitals with matched phases, on the two atoms of the bond you click
9	s orbital	A sphere, one phase

More orbitals (⋯) has a p orbital toward you, the five d orbitals (d x²−y², d xy, d xz, d yz, d z²), the f orbitals, and a benzene ring in perspective with a p orbital on every carbon.