Bow-tie complexes M Pt, Au

Despite their similar geometry and electron count, the platinum-centered complex can lose one electron to give the relatively unstable corresponding monoanion, Fig. 22a, and then add an immediately framework-destroying electron,whereas the gold-centered complex undergoes two consecutive one-electron additions which are chemically reversible, Fig, 22b.  

The corresponding redox potentials are listed in Table 10, which also quotes the redox potentials of the subsequent class of pentanuclear complexes. 

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