nickel(II) bis(p-hydroxybenzoate) dihydrazinate

[Ni(orotic acid(-2H))(H2O)2(1,3-propanediamine)]

Ni(bis(1-methylimidazol-2-yl)ketone)2(nitrate)2

Ni(N-(6-methyl-2-pyridyl)salicylaldimine)2