Question 10.3: Predicting Molecular Geometries Predict the geometry and bon...
Predicting Molecular Geometries
Predict the geometry and bond angles of ICl_{4}^{-}.
ICl_{4}^{-} has 36 valence electrons.
The central atom (I) has six electron groups.
Four of the six electron groups around I are bonding groups and two are lone pairs.
The electron geometry is octahedral (six electron groups), and the molecular geometry—the shape of the molecule—is square planar (four bonding groups and two lone pairs). Even
though lone pairs are present, the bond angles are 90° because the lone pairs are symmetrically arranged and do not compress the I¬Cl bond angles.
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