Question

What is the name and formula of a coordination compound comprising of two types of complex ions: one, a complex ion of Cr (III) with ethylenediamine, having a coordination number of 6; the other a complex of Ni(II) with CN-, having a coordination number of 4.

Answer 1

a. Trisethylendiaminechromate (III) ion

C₆H₂₄Cl₃CrN₆ • 3.5H₂O

b. Tetracyanidonickelate (II) ion

C₄N₄Ni^-2