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Covalent Bonding Shapes VALENCE SHEELL ELECTRON PAIR REPULSION

Published byLewis Bennett Modified over 8 years ago

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Presentation on theme: "Covalent Bonding Shapes VALENCE SHEELL ELECTRON PAIR REPULSION"— Presentation transcript:

1 Covalent Bonding Shapes VALENCE SHEELL ELECTRON PAIR REPULSION
VSEPR Covalent Bonding Shapes VALENCE SHEELL ELECTRON PAIR REPULSION

2 VSEPR Basics

3 Rules for Drawing If carbon is present, it is the central atom
Least electronegative atom is in the center. Hydrogen is never central Must achieve an octet (except Hydrogen!) Electrons to start = electrons to finish

4 VSEPR Theory Basics How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

5 Common Molecular Shapes

6

7

8 What Shape? Groups 2 Pairs 0 BeH2 CO2 HCN
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Groups 2 Pairs 0

9 BeH2 How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

10 CO2 Carbon Dioxide How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

11 HCN Hydrogen Cynanide How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Prussic Acid

12 Linear Shape BeH2 CO2 Groups 2 Pairs 0 HCN
BaF2 is an exception to VSEPR theory….non-linear….108 degeen angles…

13 What Shape? BCl3 BF3 CO32- COCl2 Groups 3 Pairs 0

14 BCl3 Boron Trichloride How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

15 [CO3]-2 Carbonate Ion How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

16 COCl2 Carbonyl dichloride
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? This colorless gas gained infamy as a chemical weapon during World War Phosgene

17 Trigonal Planar BCl3 BF3 CO32- COCl2 Groups 3 Pairs 0

18 What Shape? Groups 2 Pairs 1 SO2 NO2- O3
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Groups 2 Pairs 1

19 SO2 Sulfur Dioxide Is this correct?
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Is this correct?

20 SO2 Sulfur Dioxide Not correct, there are 10 electrons in the circle.
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Not correct, there are 10 electrons in the circle.

21 SO2 Sulfur Dioxide How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? The Single Bond is a Coordinate Covalent Bond

22 O3 Ozone How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like? Ozone also has a single coordinate covalent bond.

23 Bent Geometry SO2 NO2- O3 Groups 2 Pairs 1

24 Tetrahedral Shape CH4 CCl4 SO42- Groups 4 Pairs 0

25 CH4 Methane How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

26 CCl4 Carbon TetraFluoride
How many things are there around the central atom? What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

27

28 Trigonal Pyramidal NH3 NF3 PCl3 Groups 3 Pairs 1

29 NH3 Ammonia How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

30 Bent Geometry H2O ClO2 OF2 Groups 2 Pairs 2

31 H20 Water How many things are there around the central atom?
What structure is this molecule based on? Which atoms are replaced by lone electron pairs? What is the final structure and what are the bond angles like?

32 Trigonal Bipyramidal PF5 PCl5 Groups 5 Pairs 0

33 T-Shaped PF5 PCl5ClF3 BrF3 SeO32- Groups 3 Pairs 2

34 Seasaw Shaped SF4 BrF4+ Groups 4 Pairs 1

35 Octahedral SF6 SiF63- Groups 6 Pairs 0

36 SF6 Sulfur hexafluoride and PF5 Phosphorous Pentafluoride

37 Square Pyramidal BrF5 IF5 Groups 5 Pairs1

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