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Title: What would be the molecular shape of ICL4 -? Post by: rolfch1p on Sep 21, 2013 I've got trigonal pyramidal, but when I look at the geometric shapes shouldn't it be seesaw?
But ICl4 - has 29 vlence electrons, why wouldn't be a distorted Tetrahedral or seesaw? Title: What would be the molecular shape of ICL4 -? Post by: |R2r| on Sep 21, 2013 it is tetrahedral, Iodine with 4 chlorides around sp3 hybridized
Title: What would be the molecular shape of ICL4 -? Post by: finalace on Sep 21, 2013 ICl4- is square planar; it has the central iodine with 4 equally spaced equatorial chlorines and a lone pair above and below the iodine. The molecule has a grand total of 36 electrons: 3 lone pairs on each chlorine, 2 lone pairs on the central iodine, and 8 bonding electrons.
In this case the iodine has an expanded octet, hence the more than 8 valence electrons. Formal charge on each chlorine: 7 (neutral) - 1 (bonding) - 6 (lone electrons) = 0 Formal charge on iodine: 7 (neutral) - 4 (bonding) - 4 (lone electrons) = -1 |