Molecular geometry and shape chemistry

linear

number of bonds around a central atom: 2

number of lone pairs around a central atom: 0

number of charge clouds: 2

Trigonal planar

3, 0, 3

bent

2, 1, 3

• 120 degrees

tetrahedral

4, 0, 4

Trigonal pyramidal

3, 1, 4

bent

2, 2, 4

• 109.5 degrees

Trigonal bipyramidal

5, 0, 5

seesaw

4, 1, 5

T-shaped

3, 2, 5

linear

2, 3, 5

octahedral

6, 0, 6

Square pyramidal

5, 1, 6

Square planar

4, 2, 6

molecular geometry

describes the three-dimensional shape of just the atoms

electron geometry

describes the shape of all electron groups

Bond angles: linear

180 degrees

bond angles: trigonal planar

120 degrees

bond angles: tetrahedral

109.5 degrees

trigonal bipyramidal

120 degrees, 90 degrees

octahedral

90 degrees

sp

electron group: 2

geometry: linear

angle:180

sp²

electron group: 3

geometry: trigonal planar, bent

angle: 120

sp³

electron group: 4

geometry: trigonal bipyramidal, bent, tetrahedral

angle: 109.5

sp³d

electron group: 5

geometry: trigonal bipyramidal, seesaw, T-shaped

angle: 90, 120, 180

sp³d²

electron group: 6

geometry: octahedral, square pyramidal, square planar

angle: 90, 180