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More noble than ever: The first fully inorganic discrete polynuclear gold(III) oxo complex [AuIII4AsV4O20]8− (see structure; Au yellow, As blue, O red) was prepared by condensation of [Au(OH)4]− in the presence of AsO43− ions under mild reaction conditions. The resulting polyoxoaurate exhibits a tetrameric structure with square-planar coordinated AuIII ions linked by oxo and arsenate bridging ligands.
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Izarova et al. (2010) studied this question.
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