Presentation on theme: "Chemical Bonding and Interactions"— Presentation transcript:
1Chemical Bonding and Interactions The Ties That BindChemical Bonding and Interactions
2Chemical Bonding and Interactions Stable Electron ConfigurationsElectron-Dot (Lewis) StructuresDrawing, Rules for DrawingThe Octet RuleSome Exceptions to the RuleIonic BondingNaming ionic compoundsDrawingCovalent BondingNaming covalent compoundsElectronegativity and Polar Covalent CompoundsMolecular Shapes and the VSEPR TheoryIntermolecular Forces of AttractionH-bonds, Dipole-Dipole, Ion-Dipole, London Dispersion Forces
17The VSEPR Model Molecules with More than One Central Atom In acetic acid, CH3COOH, there are three central atoms.We assign the geometry about each central atom separately.
18Predicting Molecular Geometry Draw Lewis structure for molecule.Count number of lone pairs on the central atom and number of atoms bonded to the central atom.Use VSEPR to predict the geometry of the molecule.What are the molecular geometries of SO2 and SF4?SFSOAB4EAB2Edistortedtetrahedronbent10.1
19The VSEPR Model Predicting Molecular Geometries To determine the electron pair geometry:draw the Lewis structure;count the total number of electron pairs around the central atom.arrange the electron pairs in one of the above geometries to minimize e--e- repulsion.multiple bounds count as one bonding pair.