[NiCl4]2−-paramagnetic;[Ni(CO)4]-tetrahedral
[NiCl4]2−-square-planar;[Ni(CN)4]2−-paramagnetic
[Ni(CN)4]2−-tetrahedral;[Ni(CO)4]-paramagnetic
[NiCl4]2−-diamagnetic;[Ni(CO)4]-square-planar
[Ni(CN)4]2− is square planar, diamagnetic (0 unpaired electrons) with dsp2 hybridization.