Chlorophyll is a coordination compound of . . . . . . .

The metals present in insulin and haemoglobin are respectively:

In the complex ion $[Co(CN)_6]^{3-}$,the $Co^{3+}$ ion absorbs radiation of the violet color from the visible spectrum. What will be the color of its aqueous solution?

Discuss briefly,giving an example in each case,the role of coordination compounds in:
$(i)$ biological systems
$(ii)$ medicinal chemistry
$(iii)$ analytical chemistry
$(iv)$ extraction/metallurgy of metals

The possible formula for Prussian blue is ....

Which of the following ionic species is present in hemoglobin and responsible for transformation of oxygen?