VSEPR Theory
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Last updated 5:26 PM on 1/23/23
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38 Terms
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What does A represent?
the center atom
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What does X represent?
atoms bonded to the center atom(ligands)
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What does E represent?
lone pair of electrons around the center atom
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Planar molecules are…
generally flat and nonpolar
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If a molecule has all of the same ligands…
it will be nonpolar
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If there is a lone pair on the center atom…
it is polar
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If the ligands are different…
it will be polar
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AX3(3 electron domain)
trigonal planar
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AX3 polarity
nonpolar molecule with polar bonds
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AX3 angle measure
120 degrees
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AX2E(3 electron domain)
angular
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AX2E polarity
polar molecule
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AX2E angle measure
114 degrees
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AX4(4 electron domain)
tetrahedral
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AX4 polarity
nonpolar
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AX4 angle measure
109\.5 degrees
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AX3E(4 electron domain)
trigonal pyramidal
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AX3E polarity
polar
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AX3E angle measure
107 degrees
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AX2E2(4 electron domain)
angular
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AX2E2 polarity
polar
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AX2E2 angle measure
104 degrees
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AX5(5 electron domain)
trigonal bipyramidal
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AX5 polarity
nonpolar
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AX5 angle measure
90, 120 degrees
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AX6(6 electron domain)
octahedral
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AX6 polarity
nonpolar
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AX6 angle measure
90 degrees
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AX4E2(6 electron domain)
square planar
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AX4E2 polarity
nonpolar
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AX4E2 angle measure
90 degrees
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AX2E0 or AX2(2 electron domain)
linear
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AX2E0 or AX2 polarity
polar
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AX2E0 or AX2 angle measure
180 degrees
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AX(no domain)
linear
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AX polarity
have to find the difference in electronegativities to determine the polarity
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AX angle measure
no angle measure because there is no true center atom
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What does VSEPR stand for?
valence shell electron pair repulsion
