Molecular Shape Section 9.4

Slides:

Advertisements

Similar presentations

Molecular Shape Sect 9.4. VSEPR Model Valence Shell Electron Pair Repulsion Valence Shell Electron Pair Repulsion Electron pairs will position themselves.

Advertisements

Covalent Bonding Sec. 8.4: Molecular shape.

Covalent Bonding Sec. 8.4: Molecular shape. Objectives n Discuss the VSEPR bonding theory n Predict the shape of and the bond angles in a molecule n Define.

Section 8.4 Molecular Shapes

1 Shapes of Molecules Determined by number of valence electrons of the central atom 3-D shape a result of bonded pairs and lone pairs of electrons Use.

Molecular Shapes Chapter 6 Section 3. Molecular Structure It mean the 3-D arrangement of atoms in a molecule Lewis dot structures show how atoms are bonded.

Geometry of Molecules VSEPR Theory. Valence Shell Electron Pair Repulsion Theory (VSEPR) The geometry of the molecule at any given central atom is determined.

Section 9-4 Summarize the VSEPR bonding theory.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Molecular Geometry. 2-D and 3-D Lewis Structures explain the two dimensional structure of molecules In order to model the actual structure of a molecule.

Cornell Notes (Section 8.4, especially page 263  Topic: Molecular Geometry  Date: 2/7/2012  VSEPR = Valence Shell Electron Pair Repulsion  Valence.

VSEPR. This is the shape that CO 2 makes. 1. Linear 2. Bent 3. Trigonal planar 4. Tetrahedral 5. Trigonal pyramidal 6. Trigonal bipyramidal 7. See-saw.

VESPR Theory. Molecular Structure Molecular structure – _______________ arrangement of atoms in a molecule.

Molecular Shapes Chapter 6 Section 3. Lewis dot structures show how atoms are bonded together, but they often do not illustrate the true shape of a molecule.

Lecture 43 Molecular Shapes Ozgur Unal 1.  Using the formula or the lewis structure of the following molecule, can you determine its three-dimensional.

Section 8.13 Molecular Structure: The VSEPR Model VSEPR: Valence Shell Electron-Pair Repulsion. ▪Used to predict a 3-dimensional shape of a molecule ▪Based.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Valence Shell Electron Pair Repulsion Theory

Molecular shape: VSEPR:

Section 4: Molecular Shapes

Molecular shape: VSEPR:

Ch 9 – Covalent Bonding: Orbitals

CHEMISTRY Matter and Change

VSEPR and Molecular Geometry

Molecular Shape (Geometry)

Timberlake LecturePLUS

VSEPR Pronounced vesper…a vespa for her A vest purrs???

Molecular Geometries and Bonding Theories

Ch. 6 – Molecular Structure

Valence Shell Electron Pair Repulsion Theory

Molecular Geometry bond length, angle determined experimentally

Valence Shell Electron Pair

Ch. 6.5 Bonding Theories Molecular Geometry.

Valence Shell Electron Pair Repulsion Theory (VSEPR)

Valence Shell Electron Pair Repulsion

MOLECULAR GEOMETRY Bonding Unit.

II. Molecular Geometry (p. 183 – 187)

Molecular Geometry VSEPR and beyond!.

Chapter 6 – 3 Molecular Geometry (p. 214 – 218)

O = O V___________ S________ E________ P______ R____________

Ch 9 – Covalent Bonding: Orbitals

Valence Shell Electron Pair Repulsion Theory

Chapter 8 Section 3 Molecular Structures.

Important Information:

Molecular Structure Molecular Geometry.

Section 8.4 – Molecular Shapes

Chapter 8 Covalent Bonding 8.3 Bonding Theories

Molecular Geometry bond length, angle determined experimentally

Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair Repulsion

Molecular Geometry 11/8 Opener:

Valence Shell Electron Pair Repulsion Theory

Objectives To understand molecular structure and bond angles

Molecular Structure II. Molecular Geometry.

Molecular Geometry.

Molecular Geometry bond length, angle determined experimentally

Molecular Geometry bond length, angle determined experimentally

II. Molecular Geometry (p. 183 – 187)

Valence Shell electron pair repulsion model 3D models

Molecular Shapes VSEPR Model

Molecular Geometry.

Valence Shell Electron Pair Repulsion

II. Molecular Geometry (p. 183 – 187)

II. Molecular Geometry (p. 183 – 187)

Valence Shell Electron Pair Repulsion

Valence Shell Electron Pair Repulsion Theory

Presentation transcript:

Molecular Shape Section 9.4 Chemistry

Objectives Discuss the VSEPR bonding theory Predict the shape of and the bond angles in a molecule Define hybridization

The Shape of Molecules The shape of molecules determines reaction ability The model we use is the VSEPR model Valence Shell Electron Pair Repulsion

VSEPR Model Minimizes the repulsion of shared and unshared pairs of electrons around the central atom 7 key shapes you will need to be able to draw and identify

Linear Molecular Shape Example: BeCl2 Total Pairs of Electrons: 2 Shared Pairs of Electrons: 2 Lone Pairs: 0 Bond Angle: 180° Hybrid Orbitals: sp

Trigonal Planar Example: AlCl3 Total Pairs of Electrons: 3 Shared Pairs of Electrons: 3 Lone Pairs of Electrons: 0 Bond Angle: 120° Hybrid Orbitals: sp²

Tetrahedral Example: CH4 Total Pairs of Electrons: 4 Shared Pairs of Electrons: 4 Lone Pairs of Electrons: 0 Bond Angle: 109.5° Hybrid Orbitals: sp³

Trigonal Pyramidal Example: PH3 Total Pairs of Electrons: 4 Shared Pairs of Electrons: 3 Lone Pairs of Electrons: 1 Bond Angle: 107.3° Hybrid Orbitals: sp³

Bent Example: H2O Total Pairs of Electrons: 4 Shared Pairs of Electrons: 2 Lone Pairs of Electrons: 2 Bond Angle: 104.5° Hybrid Orbitals: sp³

Trigonal Bipyramidal Example: NbBr5 Total Pairs of Electrons: 5 Shared Pairs of Electrons: 5 Lone Pairs of Electrons:0 Bond Angle: 90°, 120° Hybrid Orbitals: sp³d

Octahedral Example: SF6 Total Pairs of Electrons: 6 Shared Pairs of Electrons: 6 Lone Pairs of Electrons: 0 Bond Angle: 90° Hybrid Orbitals: sp³d²

Hybridization Hybridization: A process in which atomic orbitals are mixed to form new, identical hybrid orbitals Carbon is the most common The number of hybrid orbitals = the number of total pairs of electrons

Homework 54-59 on page 262