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Molecular Shapes of Compounds VSEPR Models
17

VSEPR Models

Jan 01, 2016

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hakeem-holmes

VSEPR Models. Molecular Shapes of Compounds. VSEPR. V = Valence S= Shell E = Electron P = Pair R = Repulsion Used to predict the 3-D molecular shape of molecules. VSEPR Traits. Electrons on central atom arrange themselves as far apart as possible. - PowerPoint PPT Presentation
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Page 1: VSEPR Models

Molecular Shapes of Compounds

VSEPR Models

Page 2: VSEPR Models

VSEPR

V = Valence

S = Shell

E = Electron

P = Pair

R = RepulsionUsed to predict the 3-D molecular shape

of molecules

Page 3: VSEPR Models

VSEPR TraitsElectrons on central atom arrange themselves

as far apart as possible.Lone pairs on central atom repel the mostShared pairs on central atom repel the leastWe need to know:

- Lewis structure (#of bonded e- pairs & # of lone pair e- pairs)- VSEPR structure- VSEPR name- Bond angle

No VSEPR models for Ionic compounds

Page 4: VSEPR Models

One more things that may helpGeneric formula to remember shapesA = central atomX = bonded pair e-

E = lone pair e-

Example – AX2E

-two bonded pair e-

-one lone pair e-

Page 5: VSEPR Models

LinearAX2 2 bonded pairs; 0 lone pairsBond angle = 1800

Page 6: VSEPR Models

Trigonal PlanarAX3

3 bonded pairs; 0 lone pairsBond angle = 1200

Page 7: VSEPR Models

BentAX2E2 bonded pairs; 1 lone pairBond angle = <1200

Page 8: VSEPR Models

TetrahedralAX4

4 bonded pairs; 0 lone pairsBond angle = 109.50

Page 9: VSEPR Models

Trigonal PyramidalAX3E3 bonded pairs; 1 lone pairBond angle = <109.50

Page 10: VSEPR Models

BentAX2E2

2 bonded pairs; 2 lone pairsBond angle = <109.50

Page 11: VSEPR Models

Trigonal BipyramidalAX5

5 bonded pairs; 0 lone pairsBond angle = 900 & 1200

Page 12: VSEPR Models

SeesawAX4E4 bonded pairs; 1 lone pairBond angle = <900 & 1200

Page 13: VSEPR Models

T - shapeAX3E2

3 bonded pairs; 2 lone pairsBond angle = <900

Page 14: VSEPR Models

LinearAX2E3

2 bonded pairs; 3 lone pairsBond angle = 1800

Page 15: VSEPR Models

OctahedralAX6

6 bonded pairsBond angle = 900

Page 16: VSEPR Models

Square PyramidalAX5E5 bonded pairs; 1 lone pairBond angle = <900

Page 17: VSEPR Models

Square PlanarAX4E2

4 bonded pairs; 2 lone pairsBond angle = 900