Which of the following complex is considered to be tetrahedral?

[FeCl4]- [Ni(CN)4]2- [PtCl4]2- [PdCl2(NH3)2]

[FeCl4]-

[FeCl4]- is tetrahedral x + 4(-1) = -1 x - 4 = -1 x = -1 + 4 = 3 Fe3+: [Ar]3d5 As Cl- is a weak field ligand, it cannot pair up the electrons in 3d-orbital and uses s and p orbitals to form sp3 hybridization. Hence, the compound is tetrahedral.