Unformatted text preview: 1. One lone pair - square pyramidal 2. Two lone pairs - square planar The lone pairs occupy axial positions because they are 90 o from four bonding pairs. – Results in decreased repulsions compared to lone pairs in equatorial positions. Octahedral electronic arrangement: AB 6 , AB 5 U, and AB 4 U 2 AB 5 U molecules have: 1.1. octahedral electronic arrangement 1.2. Square pyramidal shape 1.3. and are polar . One example of an AB 5 U molecule is IF 5...
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- Fall '07
- Chemical bond, octahedral electronic arrangement