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 Chapter 9. Molecular Shapes. Section 9.1. Lewis structures only provide a 2-D representation of a molecule. However, by including the bond angles of molecules, a more accurate 3-D representation can be achieved. 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. Advanced Chemistry. Ms. . Grobsky. Determining Molecular Geometries. In order to predict molecular shape, we use the . V. alence . S. hell . E. lectron . P. air . R. epulsion (VSEPR) theory. This theory proposes that the geometric arrangement of groups of atoms about a central atom in a covalent compound is determined solely by the repulsions between electron pairs present in the valence shell of the central atom. 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.. 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 . Atoms, Orbitals & Bonding Topics:. Very quick history of chemistry…. What is organic chemistry?. Atomic models: nuclear to quantum. All . about . orbitals. How . orbitals fill: electron . configuration. 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. Jennie L. Borders. Section 8.1 – Molecular Compounds. A . covalent bond. is formed between atoms held together by . sharing. electrons.. A . molecule. is a group of atoms joined by . covalent bonds. 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 molecular geometry . & . orbital hybridization. CHE2060 Topic 1: Atoms, orbitals & bonding. VSEPR categorizes geometry & hybridization. # lone. . e. - pr. # . bonds. e. -. pair geometry. Unit II: Gas-filled detectors. CLRS 321. Nuclear Medicine Physics and Instrumentation 1. Objectives. (Mostly from your text). Distinguish . between covalent and delocalized molecular bonding, and briefly describe the electrical conductivity of insulators, conductors, and semiconductors.. The Covalent Bond. Section 9.1. Worldwide, scientists are studying ways to increase food supplies, reduce pollution, and prevent disease. Understanding the chemistry of compounds that make up fertilizers, pollutants, and materials that carry genetic information is essential in developing new technologies in these areas. An understanding of the chemistry of compounds requires an understanding of their bonding..