1) Answer the following questions about the
spectroscopy of metal centers.
a) Azurin contains a redox-active Cu center and
has a deep blue color owing to a particular charge transfer band. Draw the
coordination environment of azurin, and identify the ligand, the ligand
orbital, the metal oxidation state and the type of charge-transfer transition
that give rise to the blue color.
The copper center in azurin can be substituted with
Co(II) or Ni(II). Below is an overlay of
the electronic spectra of Co(II)- and Ni(II)-substituted as well as wild-type
azurin. Based on the type of the electronic transition specified in 1a,
identify which traces (solid, dashed, dashed-dotted) correspond to which type
of azurin, and briefly explain your reasoning.
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