What are the bond angles in a pentagonal bipyramidal molecule in general? If they vary from molecule to molecule then just the bond angles for IF7 would be ideal. I'd like the same thing for square antiprismatic molecules (any complex ion with coordination number 8 which is square antiprismatic - which I think is the general guess one makes for complex ions of coordination number 8 - would do the trick!). I simply can't find any of this info anywhere online. I would also appreciate if anyone has a 2D diagram (meaning bonds shown as dashes or wedges) for the square antiprismatic shape, if they could link me to it.