VSEPR
From-http://www.chemmybear.com/shapes.html
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Steric Number
(# bonded atoms + # electron pairs) |
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6 |
5 |
4 |
3 |
2 |
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AX6
octahedral
SF6, PCl6-
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AX5
trigonal bipyramidal
PCl5
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AX4
tetrahedral
CH4, AlCl4-,
NH4+, SO42-
|
AX3
trigonal planar
BF3, CO32-, NO3-
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AX2
linear
CO2, BeF2, N3-
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1 lone pair of
electrons |
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AX5E
square pyramidal
IF5, BrF5
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AX4E
distorted tetrahedron
SEESAW or disphenoid
SF4
|
AX3E
pyramidal
NH3, SO32-
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AX2E
nonlinear
SO2, NO2-,
ClNO
|
AXE
linear |
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2 lone pairs of
electrons |
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AX4E2
square planar
XeF4
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AX3E2
T-shaped
ClF3
|
AX2E2
bent
H2O, ClO2-
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AXE2
linear |
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3 lone pairs of
electrons |
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AX3E3
T-shaped |
AX2E3
linear
XeF2, I3-
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AXE3
linear
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4 lone pairs |
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AX2E4
linear |
AXE4
linear |
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5 lone pairs |
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AXE5
linear |
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Concept map from-http://www.chem1.com/acad/webtext/chembond/cb05.html
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