A chair of gold: Analogous to cyclohexane, the trinuclear gold ring [Au3(PAnP)3][ClO4]3 (PAnP=9,10-bis(diphenylphosphino)anthracene) shows a chair conformation and diastereotopic axial and equatorial phenyl rings. Variable temperature and 2D EXSY NMR studies reveal that the gold ring undergoes cyclohexane-like ring inversion (enantiomerization) in solution. In addition, the gold ring exhibits intense excimeric emission at room temperature. — = anthracene ring system in PAnP, ○ = ClO4−.
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Yip et al. (2001) studied this question.
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