Chapter_7 Oct_08 Lecture_21.pptx

Octahedron will be located on opposite sides of the

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octahedron will be located on opposite sides of the central atom, making the shape of ICl 4 - square planar. Worked Example E.D. geometry: trigonal planar Shape: trigonal planar E.D. geometry: octahedral Shape: square planar
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Bond angles deviation due to e- repulsions Some electron domains are better than others at repelling neighboring domains Lone pairs take up more space than bonded pairs of e - - Bonded pairs are restricted between atoms Multiple bonds repel more strongly than single bonds - Multiple bonds have higher e - density, more e - repulsions Lone pair-lone pair repulsion < Lone pair-bonding pair repulsion < Bonding pair-bonding pair repulsion
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Deviation from Ideal Bond Angles Trigonal planar Tetrahedral Trigonal bipyramidal Octahedral
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Geometry of Molecules with Multiple Central Atoms What happen if there is more than one central atoms? - Look at each central atom separately
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Geometry of Molecules with Multiple Central Atoms Look at each central atom separately (No lone pair on the central atom) (2 lone pairs on the central atom)
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Molecular geometry Worked Example tetrahedral tetrahedral trigonal planar trigonal planar tetrahedral bent
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Worked Example Solution The electron-domain geometry of the leftmost C is tetrahedral.
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  • Fall '16
  • hawk
  • Atom, Molecule, trigonal bipyramidal, Molecular Geometry and Polarity

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