11-07-07%20-%20Lecture%2013%20-%20Chapter%203

11-07-07%20-%20Lecture%2013%20-%20Chapter%203 - Orientation...

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Unformatted text preview: Orientation around the Central Atom Possible Orientations Central Atom with Lone Pair Sulfur Tetrafluoride, SF4 Sulfur Lone pair is in the equatorial position because it requires more room and it repulses fewer atoms. •F • •• • •• •F •• •• •• o 90Þ F S F F F 120Þ o S • F• •• •• •• • F• •• • • Molecular Geometries for Five Electron Pairs Electron Molecular Geometries for Six Electron Pairs Electron Molecular Polarity Molecular Why do ionic compounds dissolve in water? Molecular Polarity Molecular Molecules will be POLAR if a) bonds are polar AND b) the molecule is NOT “symmetric” All above are NON polar Polar or Nonpolar? Polar Compare CO2 and H2O. Which one is polar? Why? ...
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