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18 6d.pngThe reversible oxygen uptake by coordination compounds

mimics the behaviour

of natural oxygen carriers such as hemoglobin.

(i) Discuss the interaction between molecular oxygen and the iron centre in


(4 marks)

(ii) The reaction between Co(Salen) and molecular oxygen in a 1: 1 ratio results

in a paramagnetic product. However, when the Co(Salen) is in excess, the

product formed is diamagnetic. Explain briefly.

Chemical Structure of Salen

(6 marks)

18 6d.png

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