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Question:

Name the following coordination entities and describe their structures: (i) [Fe(CN)₆]⁴⁻ (ii) [Cr(NH₃)₄Cl₂]⁺ (iii) [Ni(CN)₄]²⁻ (Atomic Numbers Fe=26, Cr=74, Ni=28)

Solution:

Names of the given compounds
i) Hexacyanoferrate(II) ion.
ii) Tetraamminedichloridochromium(III) ion.
iii) Tetracyanonickelate(II) ion.