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Q. The IUPAC name of $ [Ni(NH_3 )_4][NiCl_4]$ is

IIT JEEIIT JEE 2008Coordination Compounds

Solution:

$[Ni(NH_3)_4]^{2+}$ = tetraamminenickel (II)
$[NiCl_4]^{2-}$ = tetrachloronickelate (II)
Cationic part is named first, hence : tetraamminenickel (Il)-tetrachloronickelate(II)