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Expanded Octets

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Number of e- pairs
# bonding
(sigma bonds)
# non-bonding
(unshared)
Species Geometry Description Example
6 0 XY6 octahedral Octahedral SF6
5 1 XY5E square pyramidal Square pyramidal ClF5
4 2 XY4E2 square planar Square planar XeF4
5 0 XY5 triangular bipyramidal Triangular bipyramidal PF5
4 1 XY4E disphenoidal Disphenoidal
Distorted tetrahedron
See-saw
SF4
3 2 XY3E2 t-shaped T-shaped ClF3
2 3 XY2E3 linear Linear XeF2


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