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  4. The following is a coordination compound of iron

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Q. The following is a coordination compound of iron

Bihar CECEBihar CECE 2009Coordination Compounds

Solution:

Haemoglobin, contains two part $vi z$, haem and globular protein. Haem part of haemoglobin contains one $Fe ^{2+}$ ion (iron) coordinated in a square planar array with the four N-atoms of a porphyrin molecule.
Chlorophyll is a coordination compound of $Mg$, vitamin $B _{12}$ is a coordination compound of Co while Mohr's salt is a double salt, not a coordination compound.