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. 2021 Jun 13;13(6):874. doi: 10.3390/pharmaceutics13060874

Figure 21.

Figure 21

Chemical structures of the homo- or heteroleptic polypyridyl Ru(II) complexes (1)–(17) with the general formulae [Ru(Phen)3](PF6)2, [Ru(Phen)2(Phen-X)](PF6)2, [Ru(Phen)(Phen-X)2](PF6)2, [Ru(Phen-X)3](PF6)2, [Ru(Phen-X)2Cl2], or [Ru(Phen)2Cl2]. The core structures of the complexes (1)–(17) correspond to either (a) or (b), as denoted in the top right corner of the figure. The fluorene unit was bonded to the 1,10-phenanthroline moiety ligand either directly (Fluorenyl, bottom right corner) or via a triple bond (T-Fluorenyl).