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Yersiniabactin is a hexadentate ligand that forms an octahedral ligand

5) Bioinorganic/d-blockYersiniabactin is a hexadentate ligand that forms an octahedral ligandsphere around Fe(Ill). Its structure is shown below. It has stronger binding to Fe(III) than to Fe(II). It is alsoa virulence factor of the pathogenic bacteria Yersinia pestis, the bacteria responsible for the plague.Mutant Y. pestis that is lacking the ability to synthesize yersiniabactin is less fatal in mouse models.SH2CCH3 SCH3OHOHOHHOYersiniabactina) Based on your understanding of bioinorganic chemistry, what role do you think Yersiniabactin mightplay for Y. pestis? Why do you think Y. pestis needs Yersiniabactin to be fatal?b) Circle (or list) the 6 donor atoms that you believe bind to the Fe(III). Justify your choices.c) If the Fe(III) is reduced to Fe(II), Yersiniabactin has weaker affinity for the metal. Use hard soft acidbase theory to explain why you think this happens.

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