The number of species having a square planar shape from the following is _______ XeF4, SF4, SiF4, BF4 –, BrF4 – , [Cu(NH3)4]2+, [FeCl4]2–, [PtCl4]2– | JEE Mains Chemistry Past Papers β€” Chem-Mantra | Chem-Mantra