Name the following coordination entities and describe their structures:
(i) $F e (C N)_{6}]^{4 -}$
(ii) $[C r (N H_{3})_{4} C l_{2}]^{+}$
(iii) $[N i (C N)_{4}] 2 -$
(Atomic Numbers $F e = 26, C r = 74, N i = 28$ )

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Solution

Names of the given compounds
i) Hexacyanoferrate (II) ion.
ii) Tetraaminodichlorido chromium.
iii) Tetracyano nickelate (II) ion.

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