Symmetry reduction five-coordinate complexes

However, the Schiff base complex lacks the stability towards reduction by CN" that characterizes the Cu( II) in galactose oxidase. While the enzyme binds a single CN" even at large CN" excess (22), the Cu(II) in the model is reduced by the ligand. To assess the underlying structural components which stabilize the enzymic Cu(II) towards reduction by CN", a five-coordinate model (Figure 2) having square bipyramidal symmetry was prepared (23). (The conditions and system procedures... 

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