Molecular Geometry

Unit 2

linear

• electron domain → 2

• lone pairs → 0

• bond angle → 180 degrees

trigonal planar

• electron domain → 3

• lone pairs → 0

• bond angle → 120 degrees

bent

• electron domain → 3

• lone pairs → 1

• bond angle → < 120 degrees

tetrahedral

• electron domain → 4

• lone pairs → 0

• bond angle → 109.5 degrees

trigonal pyramidal

• electron domain → 4

• lone pairs → 1

• bond angles → < 109.5 degrees

bent

• electron domain → 4

• lone pairs → 2

• bond angle → < 109.5 degrees

trigonal bipyramidal

• electron domain → 5

• lone pairs → 0

• bond angle → 90, 120 degrees

see-saw

• electron domain → 5

• lone pairs → 1

• bond angle → < 90 degrees, < 120 degrees

t-structure

• electron domain → 5

• lone pairs → 2

• bond angle → <90 degrees

linear

• electron domain → 5

• lone pairs → 3

• bond angle → 180 degrees

octahedral

• electron domain → 6

• lone pairs → 0

• bond angle → 90 degrees

square pyramidal

• electron domain → 6

• lone pairs → 1

• bond angle → 90, < 90 degrees

square planar

• electron domain → 6

• lone pairs → 2

• bond angle → 90 degrees