1372 Lec 04Oct2011 - 1 Chapter Ten (secs 10.1-10,4)...

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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 1 Molecular Geometry Molecular geometry, or the shape of a molecule, is described by the geometric figure formed when the atomic nuclei are joined by (imaginary) straight lines. Molecular geometry is found using the Lewis structure, but the Lewis structure itself does NOT necessarily represent the molecule’s shape. Chapter Ten (secs 10.1-10,4) Chapter Ten (secs 10.1-10,4)
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 2 VSEPR Valence-Shell Electron-Pair Repulsion ( VSEPR ) is a simple method for determining geometry. Basis: pairs of valence electrons in bonded atoms repel one another. These mutual repulsions push electron pairs as far from one another as possible. B A B B B B B A
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 3 Electron-Group Geometries An electron group is a collection of valence electrons, localized in a region around a central atom. One electron group: A single unpaired electron an unshared pair of valence electrons (a lone pair) a bond (single, double, or triple) The repulsions among electron groups lead to an orientation of the groups that is called the
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This note was uploaded on 12/19/2011 for the course CHEM 1372 taught by Professor Staff during the Spring '08 term at University of Houston.

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1372 Lec 04Oct2011 - 1 Chapter Ten (secs 10.1-10,4)...

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