Ni(2-hydroxy-3,5-dimethyl acetophenone oxime(-1H))2

[Ni(1,2,3,6-tetrahydro-2,6-dioxo-4-pyrimidinecarboxylic acid(-2H))(H2O)2(im)2]

[Ni(triethanolamine)2]squarate

[Ni(isonicotinic acid 2-hydroxybenzylidene)hydrazide(-1H))2]*EtOH

nickel(II) allylacetoacetate dihydrate