Chapter 9: VSEPR Structures WITH ANGLES

How are electron domains arranged?

Arranged to minimize repulsive energy

How many electron domains is a single bond? Double? Triple?

• Single, Double, and Triple Bonds = ALL WORTH ONE ELECTRON DOMAIN

How many electron domains are two electrons?

• One lone pair = one electron domain

Which has greater repulsion: lone pairs or bond pairs?

Lone pairs > bond pairs

When drawing 3D shapes, what do lines, wedges, and dashed lines mean?

• Lines: Bonds are plane to the paper

• Wedges: Bonds are coming out of the paper, towards you

• Dashed Lines: Bond pointing away, towards the back

• 

EDG and MG: 2 bonded pairs

• EDG: Linear

• MG: Linear

• 180 degrees

EDG and MG: 3 bonded pairs

• EDG: Trigonal Planar

• EDG: Trigonal Planar

• 120 degrees

EDG and MG: 2 bonded pairs, 1 lone pair

• EDG: Trigonal Planar

• MG: Bent

• Two greater than 120, one less than 120

EDG and MG: 4 bonded pairs

• EDG: Tetrahedral

• MG: Tetrahedral

• All 109.5 degrees

EDG and MG: 3 bonded pairs, 1 lone pair

• EDG: Tetrahedral

• MG: Trigonal Pyramidal (has a triangle base)

• Less than 109.5, around 107 degrees

EDG and MG: 2 bonded pairs, 2 lone pairs

• EDG: Tetrahedral

• MG: Bent/Angular (ex. H2O)

• Less than 109.5, approx 104.5. Other side is more than 180

EDG and MG: 5 bonded pairs

• EDG: Trigonal Bipyramidal

• MG: Trigonal Bypyramidal

• Equatorial: 120 degrees. Equatorial to axis: 90 degrees

EDG and MG: 4 bonded pairs, 1 lone pairs

• EDG: Trigonal Bipyramidal

• MG: See saw

EDG and MG: 3 bonded pairs, 2 lone pairs

• EDG: Trigonal Bipyramidal

• MG: T-shaped

EDG and MG: 2 bonded pairs, 3 lone pairs

• EDG: Trigonal Bypyramidal

• MG: Linear

• Axis to axis = 180

EDG and MG: 6 bonded pairs

• EDG: Octahedral

• MG: Octahedral

• 180 axis. 90 equatorial.

EDG and MG: 5 bonded pairs, 1 lone pairs

• EDG: Octahedral

• MG: Square Pyramidal

• Equatorial: less than 90 degrees

EDG and MG: 4 bonded pairs, 2 lone pairs

• EDG: Octahedral

• MG: Square Planar

• All 90 degrees

EDG and MG: 3 bonded pairs, 3 lone pairs

• EDG: Octahedral

• MG: T-shaped

EDG and MG: 2 bonded pairs, 4 lone pairs (not mentioned in class)

• EDG: Octahedral

• MG: Linear