Fig. 3. (a) X-ray crystallography structure of the chiral gold NC [Au20(PP3)4]Cl4 (PP3 = tris(2-(diphenylphosphino)ethyl)phosphine), showing the bridging mode of PP3. The 16 surface gold atoms are of six types (from A to F), the four interstitial Au atoms are shown in green, and phenyl groups are omitted for clarity. Reproduced with permission from ref. 41. Copyright 2014 Wiley-VCH. (b) X-ray crystallography structure of one of the enantiomers of a bimetallic chiral [Ag46Au24(SR)32](BPh4)2 NC. Gray: carbon; red: sulfur; green: silver; yellow: gold; pink: boron. The hydrogen atoms are omitted for the sake of clarity. Reproduced with permission from ref. 58. Copyright 2015 American Association for the Advancement of Science.
