1 / 19

V alence S hell E lectron P air R epulsion Theory

Planar triangular. V alence S hell E lectron P air R epulsion Theory. Tetrahedral. Trigonal pyramidal. Bent. Molecular Shape. VSEPR theory assumes that the shape of a molecule is determined by the repulsion of electron pairs. VSEPR Theory. Based on Electron Dot (Lewis structures)

leda
Download Presentation

V alence S hell E lectron P air R epulsion Theory

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Planar triangular ValenceShellElectronPairRepulsionTheory Tetrahedral Trigonal pyramidal Bent

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

  3. VSEPR Theory • Based on Electron Dot (Lewis structures) • Theory predictsshapesof compounds • abbreviated VSEPR • VSEPR (pronounced “vesper”) stands for Valence Shell Electron Pair Repulsion • VSEPR predicts shapes based on electron pairs repelling (in bonds or by themselves) • Electronsaround central nucleus repeleach other. So, structures have atoms maximally spread out

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

  5. Models Tetrahedral TriangularPlanar Bent Linear Trigonal pyramidal

  6. 109.5° methane, CH4 Tetrahedral Bonds are all evenly spaced electrons

  7. .. .. .. .. ammonia NH3 Trigonal Pyramidal Less repulsion between the bonding pairs of electrons

  8. .. .. 109.5° (109.5°) 109.5° (107°) 109.5° (105°) .. water, H2O

  9. .. .. ..

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

  11. molecular geometry. H2CO

  12. molecular geometry. H2CO

  13. Methane (CH4) simple hydrocarbon. Shape is not planar but tetrahedral. H C H H H tetrahedral

  14. 4 Tetrahedral Trigonal Pyramidal 4 (3 shared 1 lone pair)

  15. Bent 4 (2 shared 2 lone pairs) Linear CO2 4

  16. Linear 2 Trigonal Planar 3

  17. SL Content

  18. HL Content

  19. HL Content

More Related