chem 171 - molecular geometry (copy)

Electronic geometry

refers to the position of all electrons in a molecule, whether bonding or nonbonding

Molecular geometry

the arrangement of bonded atoms, taking lone pairs into consideration

Linear

2 bonds to a central atom, 0 lone pairs

Trigonal planar

3 bonds, 0 lone pairs

Trigonal planar with one lone electron pair

Bent

Tetrahedral

4 bonds, 0 lone pairs

Tetrahedral with one lone electron pair

Trigonal pyramidal

Tetrahedral with two lone electron pairs

Bent

Tetrahedral with three lone electron pairs

Linear

Linear molecular geometry angle

180

Trigonal planar molecular geometry angle

120

Tetrahedral molecular geometry angle

109.5

2 bonds with 1 lone pair (bent) electronic geometry angle

117.5

3 bonded pairs and 1 lone pair electronic geometry

107