We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byBraiden Shingler
Modified about 1 year ago
Lecture 11 - VSEPR Theory, Molecular Shape 5 Base e - pair geometries will predict 13 Molecular geometries STEPS FOR SUCCESS: 1.draw Lewis 2. bonding pairs 3.lone pairs 4.multiple bonds count as one bonded pair
Resonance Structures e.g. O 3 (ozone) OOO.. : :
e.g. SO 3 OOOSOSOSOOOOOOOSOSOSOOOO
e.g. carbonate ion, CO 3 -2 OOOCOCOCOOOOOOOCOCOCOOOO -2
Molecules that don’t obey rules Case 2. Incomplete octets FBFFFBFF H - Cl
Molecules that don’t obey rules Case 3. Expanded Octets e.g. Phosphorus[Ne] 3s 2 3p 3 e.g. Sulfur[Ne] 3s 2 3p 4 e.gXenon[Ne] 3s 2 3p 6 3d sublevel is close in energy to 3p!
Molecules that don’t obey rules Case 3. Expanded Octets ClF ClFF ClPS ClFF ClF 10 electrons! 12 electrons!
Molecules that don’t obey rules Case 3. Expanded Octets Xe F F F F : : 12 electrons!
Predicting Molecular Shapes VSEPR Theory (Valence Shell Electron Pair Repulsion) - Electron clouds repel one another - Terminal atoms move as far apart as possible - Distinctive geometry results
VSEPR Step 1. - count the number of total electron pairs around the central atom - count # Bonding Pairs -count # Nonbonding or Lone Pairs Step 2. Predict the shape!
VSEPR ElectronBonds Lone NotationShape Pairs AX 2 linear AX 3 trigonal planar AX 2 Ebent
AX 2 e.g. CO 2 (Linear) O = C = O bond angle = 180 o
AX 3 e.g. BF 3 (trigonal planar) bond angle = 120 o B F F F
AX 2 E e.g. SO 2 (bent) bond angle = 105 o S O O :
VSEPR ElectronBonds Lone NotationShape Pairs AX 4 tetrahedral AX 3 E trigonal pyramidal AX 2 E 2 bent
AX 4 e.g. methane C All angles o (tetrahedral)
AX 3 E e.g. ammonia o (trigonal pyramidal)
AX 2 E 2 e.g. water o (bent)
VSEPR ElectronBonds Lone NotationShape Pairs AX 5 trigonal bipyramidal AX 4 E see-saw AX 3 E 2 T-shaped AX 2 E 3 Linear
AX 5 Cl ClP Cl ideal angles: 90 o, 120 o (trigonal bipyramidal)
AX 4 E FFSFFFFSFF : ideal angles: 90 o, 120 o (seesaw)
AX 3 E 2 Cl Cl I Cl : : ideal angles: 90 o (t-shaped)
AX 2 E 3 F Xe: F : : angle: 180 o (linear)
VSEPR ElectronBonds Lone NotationShape Pairss Pairs AX 6 octahedral AX 5 E square pyramidal AX 4 E 2 square planar
AX 6 FFFSFFFFFFSFFFFF all angles 90 o (octahedral)
AX 5 E FFFIFF:FFFIFF:FF all angles 90 o (square pyramidal)
AX 4 E 2 :F XeF : all angles 90 o (square planar)
Molecular Geometry Chapter 8 Part 2 Bucky ball Carvone.
Predict the geometry of the molecule from the electrostatic repulsions between the electron (bonding and nonbonding) pairs. Valence shell electron pair.
Molecular Geometry and VSEPR Theory. VSEPR Theory Valence Shell Electron Pair Repulsion Theory States that electron pairs repel each other and assume.
Copyright McGraw-Hill Chapter 9 Chemical Bonding II: Molecular Geometry and Bonding Theories.
+ Bonding Part III Unit 5: Bonding Mrs. Callender VS E P R.
VESPR Theory. Molecular Structure Molecular structure – _______________ arrangement of atoms in a molecule.
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.
Molecular Shape The Geometry of molecules. Molecular Geometry nuclei The shape of a molecule is determined by where the nuclei are located. nuclei electron.
Molecular Structure Molecular geometry is the general shape of a molecule or the arrangement of atoms in three dimensional space. Physical and chemical.
Chapter 9 Molecular Geometry and Bonding Theories.
IIIIII Molecular Geometry Molecular Structure. A. VSEPR Theory Valence Shell Electron Pair Repulsion Theory Electron pairs orient themselves so that.
Shapes of molecules & ions. VSEPR theory VSEPR - the Valence Shell Electron Pair Repulsion theory is used to obtain the shape of simple molecules and.
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.
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.
to predict the molecular shape for molecules using Valence Shell Electron Pair Repulsion (VSEPR) theory. shapes to know: –linear –bent –trigonal planar.
Molecular Geometry and Bonding Theories. The properties of a molecule depend on its shape and and the nature of its bonds. In this unit, we will discuss.
VSEPR Theory Valence Shell Electron Pair Repulsion.
Ch-8 Part II Bonding: General Concepts. Molecular Geometry and Bond Theory In this chapter we will discuss the geometries of molecules in terms of their.
MOLECULAR STRUCTURE MOLECULAR GEOMETRY. VSEPR THEORY Valence-Shell Electron-Pair Repulsion Theory: Because electron pairs repel, molecules adjust their.
Chemistry Chapter 9 Notes #3. Representing Molecules Molecular Formula –Ex. CH 4 –Ex. H 2 O Structural/ Lewis Formula Ball & Stick Model Space Filling.
Bonds. Bond Energy Bond Energy: the energy required to break a bond What type of bond has the highest bond energy? (Single, Double, or Triple) C-C348.
VSEPR Covalent Bonding Shapes VALENCE SHEELL 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.
Drawing Lewis structures 1.Calculate the total number of valence electrons in the compound. 2.Choose the central atom and place the remaining atoms symmetrically.
Molecular shapes Balls and sticks. Learning objectives Apply VSEPR to predict electronic geometry and shapes of simple molecules.
The Shape of Covalent Molecules 1.VSEPR Theory 2.Different ways to draw covalent bond 3.Different shapes of molecules 4.Shapes of molecules with lone.
Molecular Geometry Chapter 9. Molecular Shapes The shape of a molecule plays an important role in its reactivity. By noting the number of bonding and.
Cornell Notes (Section 8.4, especially page 263 Topic: Molecular Geometry Date: 2/7/2012 VSEPR = Valence Shell Electron Pair Repulsion Valence.
Chemical Bonding: Molecular Shapes. VSEPR Theory From a correct Lewis structure, we can get to the 3-D shape using this theory. VSEPR stands for valence.
Unit 7 Lewis Structures and VSEPR. Lewis Structures Show the valence electrons and bonds for a compound. 1. Draw the electron dot for each element.
AS Jul-12. BASIC IDEAS Shapes of molecules and ions depends on total number of electron pairs around the central atom. Two types of electron pairs:
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.
Lewis Structures & VSEPR. Lewis Structure Lewis Structures – shows how the _______________ are arranged among the atoms of a molecule There are rules.
Drawing Lewis Structures and VSEPR A Tutorial on Writing Lewis Dot Structure.
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.
Molecular Shape Sect 9.4. VSEPR Model Valence Shell Electron Pair Repulsion Valence Shell Electron Pair Repulsion Electron pairs will position themselves.
Molecular Geometry Chapter 6.5. VSEPR THEORY Lewis Structures are 2D but we live in a 3D world. molecular geometry: the three-dimensional arrangement.
VSEPR Theory. Problem Give possible Lewis structures for XeO 3, an explosive compound of xenon. Which Lewis structure or structures are most appropriate.
1 Trigonal Bipyramidal Electronic Geometry: AB 5, AB 4 U, AB 3 U2, and AB 2 U 3 If lone pairs are incorporated into the trigonal bipyramidal structure,
Drawing Lewis Structures and VSEPR. Draw basic Lewis dot structures of atoms and compounds. Using VSEPR, predict bond shape from electron arrangement.
Notes #10 Lewis Structures. Valence Electrons Valence electrons are those electrons in the highest principle energy level (n). Only these outer electrons.
After today, you will be able to… Explain Valence Shell Electron Pair Repulsion Theory (VSEPRT) Use structural formulas to describe the molecular geometry.
Honors Shapes to Know: See Honors Packet – Linear – Trigonal Planar – Bent (with 3 e- regions and with 4) – Trigonal Pyramidal – Tetrahedral – Trigonal.
IIIIII I. Lewis Diagrams Molecular Structure. A. Octet Rule n Remember… Most atoms form bonds in order to have 8 valence electrons.
Chemistry 545 Inorganic Chemistry Lecture 1. VSEPR.
Molecular Geometry (Shapes of Molecules) VSEPR Theory Honors Chemistry.
Molecular Geometries and Bonding Molecular Geometries and Bonding Chapter 9 Molecular Geometries and Bonding Theories.
© 2017 SlidePlayer.com Inc. All rights reserved.