Lecture 24: Applications of Valence Bond Theory The material in this lecture covers the following in Atkins. 14 Molecular structure Valence-bond theory.

Slides:

Advertisements

Similar presentations

Valence Bond Theory. What is it? Created by Linus Pauling – Go America! It is a good qualitative view of the bonding of atoms The main idea is…… Bonds.

Advertisements

Symmetry Translation Rotation Reflection Slide rotation (S n )

The one that is lower in energy is called the bonding orbital, The one higher in energy is called an antibonding orbital. These two.

Valence-bond theory. The remaining 2p orbitals cannot merge to give a bonds as they do not have cylindrical symmetry around the internuclear axis. Instead,

+ Wave Mechanics and Covalent Bond Formation Ch 9.

1 Compounds Containing Double Bonds Ethene or ethylene, C 2 H 4, is the simplest organic compound containing a double bond. Lewis dot formula N = 2(8)

Lecture 23: Introduction to Valence Bond Theory The material in this lecture covers the following in Atkins. 14 Molecular structure Valence-bond theory.

Lecture 15 Molecular Bonding Theories 1) Molecular Orbital Theory Considers all electrons in the field of all atoms constituting a polyatomic species,

Chapter 9 Molecular Geometries and Bonding Theories.

MOLECULAR STRUCTURE CHAPTER 11 Experiments show O 2 is paramagnetic.

Chemical Bonding: The Covalent Bond Model. Chemical Bonds Forces that hold atoms to each other within a molecule or compound.

1 Bonding and Molecular Structure. 2 Valence Bond Theory In covalent bonding, orbitals overlap Most primitive overlap between 2 s- orbitals –sigma (σ)

MO diagram for homonuclear diatomic molecules Li 2 through N 2 MO diagram for homonuclear diatomic molecules O 2 and F 2.

Molecular Orbital Theory Atomic orbitals mix together and make: – Bonding Orbitals Electrons in these orbitals help hold atoms near each other – Antibonding.

Simple MO Theory Chapter 5 Wednesday, October 15, 2014.

Chapter 101 Bonding and Molecular Structure Chapter 10.

Lecture 27: Homonuclear Diatomic Molecules-II The material in this lecture covers the following in Atkins. 14 Molecular structure Molecular Orbital Theory.

Chapter 18 Molecular orbitals and spectroscopy 18.1Diatomic molecules 18.2Polyatomic molecules 18.3Conjugation of bonds and resonance structures 18.4The.

Lecture 37: Symmetry Orbitals

Chemistry 100 Chapter 9 Molecular Geometry and Bonding Theories.

Valence Bond (VB) and Molecular Orbital (MO) Theories

Molecular orbital theory Overcoming the shortcomings of the valence bond.

Molecular Geometry and Bonding Theories 9.1 Molecular Shapes The size and shape of a molecule of a particular substance play an important part in determining.

Chapter 10: Covalent Bond Theories

Lecture 25: Introduction to Molecular Orbital Theory The material in this lecture covers the following in Atkins. 14 Molecular structure Molecular Orbital.

Chemistry 100 Chapter 9 Molecular Geometry and Bonding Theories.

Chemistry 100 Chapter 9 Molecular Geometry and Bonding Theories.

Molecular Orbital Energy Diagrams (16.7) MO energy diagrams are useful in that they show how atomic orbitals from different atoms may combine to molecular.

Atomic QM to Molecular QM ( ) Solution of SE for molecules is more complicated due to much larger number of electrons and multiple nuclei – SE.

Molecular Orbitals An overview. MO Theory Robert Mullikan won the Nobel Prize in 1966 for developing this theory. This theory describes the electrons.

Molecular Geometry & Bonding Theories

What kind of orbital is this? (A)  g (B)  u * (C)  g * (D)  u (E)  g * side viewview along molecular axis.

Hybrid Orbitals With hybrid orbitals the orbital diagram for beryllium would look like this. The sp orbitals are higher in energy than the 1s orbital but.

Chemical Bonding II – Molecular Geometry and Hybridisation of Atomic Orbitals General Chemistry I CHM 111 Dr Erdal OnurhanSlide 1 Molecular Geometry of.

Two Bonding Theories Valence Bond Theory (localized electron model) –Electrons in a molecule still occupy orbitals of individual atoms. Molecular Orbital.

Lecture 18: Orbitals of the Hydrogen Atom The material in this lecture covers the following in Atkins. The structure and Spectra of Hydrogenic Atoms 13.2.

Single, Double, and Triple Bonds Covalent Bonds.

Chapter 8 Lecture 8.5 Hybridization Section 8.3 Bonding Theories.

Lecture 34: Symmetry Elements The material in this lecture covers the following in Atkins. 15 Molecular Symmetry The symmetry elements of objects 15.1.

4.6 Quantum Mechanics and Bonding Hybridization We need next to examine the relationship between: isolated atoms (with valence e’s in s,p, and d orbitals.

Molecular Orbital Theory Bonding Models: Lewis Structures and VSEPR Valence Bond (VB) or Localized Electron (LE) Theory Molecular Orbital (MO) Theory Bonding.

Which one of the following statements is false? Valence.

Chapters 8 , 9 & 22: Covalent Bonding and Naming Compounds

4.6 Quantum Mechanics and Bonding: Hybridization.

Sigma and Pi bonding and Molecular Orbital Theory.

Lecture 2 Chemical Bonds: Atomic Orbital Theory and Molecular Orbital Theory Dr. A.K.M. Shafiqul Islam

Molecular Orbital Theory

Solid State Chemistry Chapter 4 Molecular Structure

CHAPTER 8: ADVANCED THEORIES OF COVALENT BONDING

MOLECULAR ORBITAL THEORY

Chapter 9 Valence Bond Theory.

SCH4U1 September Mr. Dvorsky

Experiments show O2 is paramagnetic

Sigma (s) and Pi Bonds (p)

Chemistry 141 Monday, November 20, 2017 Lecture 32 Hybridization

18.2 Valence bond theory: hybridized orbitals and polyatomic molecules

Hybrid Orbitals Consider beryllium:

8.3 Molecular Orbitals When two atoms combine, the molecular orbital model assumes that their atomic orbitals overlap to produce molecular orbitals,

Chapter 1B Carbon Compounds and Chemical Bonds

University of California,

Symmetry properties of molecular orbitals

Molecular Orbital Theory

Molecular Orbital Theory

The Central Themes of VB Theory

Orbital Hybridization

DEPARTMENT OF CHEMISTRY

Orbital Hybridization

Valence Bond Theory (VBT) Molecular Orbital Theory (MOT)

Molecular Orbital Theory

Rotation about single and multiple bonds

Presentation transcript:

Lecture 24: Applications of Valence Bond Theory The material in this lecture covers the following in Atkins. 14 Molecular structure Valence-bond theory 14.2 Homonuclear Diatomic Molecules 14.3 Polyatomic Molecules Lecture on-line Applications of Valence Bond Theory (PowerPoint) Applications of valence Bond Theory (PDF) Handout for this lecture

The orbital overlap and spin-pairing between electrons in two collinear p orbitals that result in the formation of a ( bond.

A representation of the structure of a triple bond in ethyne; only the  bonds are shown explicitly. The overall electron density has cylindrical symmetry around the axis of the molecule.