Lecture _VSPER.pptx educational purpose only

VSPER for education purpose only

1. ‹#›

2. ‹#›

3. ‹#›

4. ‹#›

5. ‹#›

6. V alence S hell E lectron P air R epulsion Theory Planar triangular Tetrahedral Trigonal pyramidal Bent

7. VSEPR theory assumes that the shape of a molecule is determined by the repulsion of electron pairs. Molecular Shape

8. VSEPR Theory Based on Electron Dot (Lewis structures) Theory predicts shapes of compounds abbreviated VSEPR VSEPR (pronounced “vesper”) stands for V alence S hell E lectron P air R epulsion VSEPR predicts shapes based on electron pairs repelling (in bonds or by themselves) Electrons around central nucleus repel each other. So, structures have atoms maximally spread out

9. VSEPR overview Each shape has a name (you will have to know these ) Names of Shapes: tetrahedral trigonal pyramidal Bent Linear trigonal planar

10. Triangular Planar Tetrahedral Trigonal pyramidal Linear Bent or V Models

11. methane, CH 4 Bonds are all evenly spaced electrons 109.5° Tetrahedral

12. Less repulsion between the bonding pairs of electrons .. ammonia NH 3 .. .. .. Trigonal Pyramidal

13. .. .. .. 109.5° ( 109.5 °) 109.5° ( 107 °) 109.5° ( 104.5°) water, H 2 O

14. .. .. ..

15. Bent or V 2 unshared pairs of e’s at top of O repel bonds and force them to bend

16. molecular geometry. H 2 CO

17. molecular geometry. H 2 CO

18. VSEPR shape orbitals tetrahedral planar linear sp 3 sp 2 sp