Chemistry - Unit 2: Molecular structure

2 electron domains

zero lone pairs

Linear

180 degree bonds

AX₂

3 electron domains

zero lone pairs

trigonal planar

120 degree bonds

AX₃

3 electron domains

1 lone pair

bent

<120 degree

AX₂ E₁

4 electron domains

zero lone pairs

tetrahedral

109.5 degree

AX₄

4 electron domains

1 lone pair

trigonal pyramidal

<109.5 degree (~107)

AX₃ E₁

4 electron domain

2 lone pairs

bent

<109.5 (~105)

AX₂ E₂

5 electron domains

zero lone pairs

trigonal bipyramidal

90, 120

AX₅

5 electron domains

1 lone pair

seesaw

<90, <120

AX₄E₁

5 electron domains

2 lone pairs

T-structure

90, 180

AX₃E₂

5 electron domains

3 lone pairs

linear

180

AX₂E₃

6 electron domains

zero lone pairs

octahedral

90

AX₆

6 electron domains

1 lone pair

square pyramidal

90, <90

AX₅E₁

6 electron domains

2 lone pairs

square planar

90

AX₄E₂