Electron & Molecular Geometry (VSPER)

EG: Linear

2 attachments (180°)

EG: Trigonal Planar (120°)

3 attachments

2 attachments + 1 LP

EG: Tetrahedral (109.5°)

4 attachments

3 attachments + 1 lone pair

2 attachments + 2 lone pairs

EG: Trigonal bipyramidal (90°, 120°, 180°)

• 5 attachments

• 4 attachments + 1 LP

• 3 attachments + 2 LPs

• 2 attachments + 3 LPs

EG: Octahedral (90°, 180°)

• 6 attachments

5 attachments + 1 LP

4 attachments + 2 LPs

3 attachments + 3 LPs

2 attachments + 1 LP (Trigonal Planar)

MG: Bent

3 attachments + 1 LP (Tetrahedral)

MG: Trigonal Pyramidal

2 attachments + 2 LPs (tetrahedral)

MG: Bent

4 attachments + 1 LP (trigonal bipyramidal)

MG: Seesaw

3 attachments + 2 LPs (trigonal bipyramidal)

MG: T-shaped

2 attachments + 3 LPs ((trigonal bipyramidal)

MG: Linear

5 attachments + 1 LP (octahedral)

MG: Square pyramidal

4 attachments + 2 LP (octahedral)

MG: Square planar

3 attachments + 3 LP (octahedral)

MG: T-shaped

If there are no LP on central atom then…

the molecular geometry is the same as the electron geometry