Question

Using VSEPR theory, predict the probable structure of \[\ce{IF^-_6}\].

Answer 1

1. The central atom is iodine (I) with 7 electron pairs (6 bonding + 1 lone pair).
2. Electron geometry is octahedral (6 bonds + 1 lone pair = 7 regions).
3. Lone pair presence distorts the shape from perfect octahedral.
4. Molecular shape is distorted octahedral or distorted pentagonal bipyramidal.
5. The resulting geometry shows a slightly distorted octahedral form due to lone pair repulsion.

Thus, (\[\ce{IF^-_6}\]) has a distorted octahedral shape with one lone pair on iodine.