Which statement about the shapes and bonding of transition metal complex ions is not correct?
The complex ion [Cr(C2O4)3]3−[Cr(C_2O_4)_3]^{3-}[Cr(C2O4)3]3− has an octahedral shape and contains bidentate ligands.
The complex ion [CoCl4]2−[CoCl_4]^{2-}[CoCl4]2− has a tetrahedral shape with bond angles of approximately 109.5∘109.5^\circ109.5∘.
The active component of Tollens' reagent, [Ag(NH3)2]+[Ag(NH_3)_2]^+[Ag(NH3)2]+, has a tetrahedral geometry.
Cisplatin is a square planar neutral complex of platinum(II) with bond angles of 90∘90^\circ90∘.
