Please do not adjust margins attributed to the difference in the ease of proton dissociation of the acetylene groups (pKa) of both ligands. The 1 H NMR measurements revealed that the NMR shifts of the acetylene (H-C≡C) protons in H-C2PhTpy and H-PA were 3.15 ppm (Fig. ) and 3.07 ppm (TCI Product Number: 3RJHI), indicating that the electron density of the hydrogen in H-C2PhTpy is lower than in H-PA. This suggests that H-C2PhTpy more readily deprotonates than H-PA. This difference makes H-C2PhTpy more nucleophilic than H-PA and more likely to attack the Au13 core; therefore, H-C2PhTpy is more readily incorporated onto the Au13 cluster than H-PA. Fig. shows the optical absorption spectrum of the BB cluster (red line). The absorption profile is comparable to those previously reported for 20•(PF6 -)3 and [Au13(dppe)5(EPTpy)2]•(PF6)3. This similarity indicates that the structure of the terminal functional groups of the acetylide ligands has little effect on the optical absorption properties of the cluster.