Ni(8-(-2-azobenzothiazolyl)-7-hydroxy-4-methyl coumarin)2(H2O)2*H2O

Na[nickel(II)(2-[4-(2-hydroxy-3-isopropylaminopropoxy)phenyl]acetamide dithiocarbamate)(MeO)2]*H2O

[NiCl(H2O)(3-[(Z)-5-amino-1,3,3-trimethyl cyclohexylmethylimino]-1,3-dihydroindol-2-one)]

[Ni(1,5-pentanedicarboxylato)(dipyridylamine)](n)

[Ni(orotic acid-2H)(2,2-dimethylpropane-1,3-diamine)2]