Electron Domain Geometry
The spatial arrangement of all electron domains — bonding and lone pairs alike — around a central atom.
Unit
degrees
In depth
Each single, double or triple bond counts as one domain, as does each lone pair. The domains adopt the arrangement that maximises their separation: linear, trigonal planar, tetrahedral, trigonal bipyramidal or octahedral for two through six domains. This geometry is the scaffold from which molecular shape is read off.
Examples in the real world
Water has four domains and so a tetrahedral electron geometry, even though its molecular shape is bent.