PPT-Chapter 9: Molecular Geometry and Bonding Theories

Jennie L Borders Section 91 Molecular Shapes Lewis do not indicate the shapes of molecules they simply show the number and types of bonds between atoms The overall shape of a molecule is determined by its bond angles the angles made by the lines joining the nuclei of the atoms in the molecule. This arrangement is for the valence electron pairs . What about the atoms in a compound? The molecular geometry is the location of the atoms of a compound in space We can predict the molecular geometr and . Electronegativity. Presented by . Leticia Bonita Prince. Newcastle University 4. th. Year . MChem. Student. Aims of Today. Increase your understanding of bonding and electronegativity. Increase your spatial skills and awareness using software designed by the CCDC. Molecular Geometry. Ch. 6 Sections 1-4 Review. In general, what determines whether atoms will form chemical bonds?. Atoms will form a chemical bond if their potential energy is lowered in doing so.. Describe the difference between ionic and covalent bonding.. Chapter 9. Molecular Geometry and Bonding Theories. Molecular Geometry . The three-dimensional arrangement of atoms in a molecule .  . molecular geometry. Lewis structures can’t be used to predict geometry. Metals. Look at the Periodic Table…. 75% of elements are metals!. Metals. They can vary a lot…. General Properties of Metals. Dense. Malleable. Ductile. Good conductors of heat and electricity. Shiny Lustre. Molecular Shapes. VSEPR Theory. From a correct Lewis structure, we can get to the 3-D shape using this theory.. VSEPR stands for . v. alence . s. hell . e. lectron . p. air . r. epulsion.. The theory is based on the idea that e- pairs want to get as far away from each other as possible!. Orbitals. Organic compounds are organised into groups according to similarities and differences in their structure.. Groups of atoms within a molecule give the molecule specific characteristic properties.. Higher Supported Study - Week 2 . Key Areas – Periodic Trends . The trends in . covalent radius . across periods and down groups.. The trends in . ionisation energies . across periods and down groups. . The . SHAPES . of molecules. The shape of a molecule . may determine its properties and uses. Why the shape of a molecule is important. Properties such as smell, taste, and proper targeting (of drugs) are all . 4.4.1: Describe the metallic bond as the electrostatic attraction between a lattice of positive ions and delocalized ions. . 4.4.2. : Explain the electrical conductivity and malleability of metals. . No . Lone Pair(s) on the Central Atom. . . Molecular Geometry of Molecules with Lone Pair(s) on the Central Atom. . . Carbon Dioxide and Water. CO. 2. H. 2. O. . . Dipole Moments and Structure. Dewayne E Perry. ARiSE. , ECE, UT Austin. perry@ece.utexas.edu. Theories D & E. I begin with two simple theories:. A theory about design – D. A theory about empirical evaluation – E. And a theory about how to model theories. Coverage of Chapter 991 All92 All93 All94 All95 Omit Hybridization Involving d Orbitals96 All97 and 98 Omit ALLnnThe shape of a molecule plays an important role in its reactivityBy knowing Nature of coordinative bond. Back-bonding. Bonding of metals to . p. -systems. Valence bond and hybridization. Each bond treated independently from the environment. Resonance concept. Impossibility to explain molecular geometries.