Molecular Shapes

Linear

• AB or AB₂

• 180 degrees

• Electron domain geometry: linear

• 5 fundamental domain arrangements

Trigonal Planar

• AB₃

• 120 degrees

• Electron domain geometry: trigonal planar

• 5 fundamental domain arrangements

Tetrahedral

• AB₄

• 109.5 degrees

• Electron domain geometry: tetrahedral

• 5 fundamental domain arrangements

Trigonal Bipyramidal

• AB₅

• 90 degrees (axial-equitorial)

• 180 degrees (axial-axial)

• 120 degrees (equitorial-equitorial)

• Electron domain geometry: trigonal bipyramidal

• 5 fundamental domain arrangements

Octahedral

• AB₆

• 90 degrees (axial-equitorial)

• 90 degrees (equitorial-equitorial)

• 180 degrees (axial-axial)

• Electron domain geometry: octahedral

• 5 fundamental domain arrangements

Bent

• AB₂E or AB₂E₂

• 3 or 4 electron domains

• 1 or 2 lone pairs

• Electron domain geometry: tetrahedral (2 lone pairs) or trigonal planar (1 lone pairs)

Trigonal Pyramidal

• AB₃E

• 4 electron domains

• 1 lone pair

• <109.5 degrees

• Electron domain geometry: tetrahedral

See Saw

• AB₄E

• 5 electron domains

• 1 lone pair

• 90 degrees (axial-equitorial)

• 180 degrees (axial-axial)

• <120 degrees (equitorial-equitorial)

• Electron domain geometry:

T-shaped

• AB₃E₂

• 5 electron domains

• 2 lone pairs

• 90 degrees (axial-equatorial)

• Electron domain geometry:

Linear

• AB₂E₃

• 5 electron domains

• 3 lone pairs

• 180 degrees (equatorial-equatorial)

• Electron domain geometry:

Square Pyramidal

• AB₅E₁

• 6 electron domains

• <90 degrees

Square Planar

• AB₄E₂

• 6 electron domains

• 90 degree bond angles