Darstellung und Kristallstrukturen von Silber(I)‐Gemischtligandkomplexen mit Bibenzimidazol und Triphenylphosphan: [Ag(PPh ₃ ) ₂ (bbimH ₂ )](COOCH ₃ ) · 2 CH ₂ Cl ₂ und [{Ag(PPh ₃ ) ₂ } ₂ (μ‐bbim)

Simultaneous Cation/Anion Coordination by Bifunctional 1,2-Diimine/1,2-Diamine Type Ligands: Synthesis, Structures, and Properties of Tight Ion Pair Complexes of Ruthenium and Iron

“…Ag I and Cu I complexes containing associated chloride or acetate anions have been characterized by de Souza Lemos. [25,26] Iron(II) complexes with bbimH 2 exhibit complex hydrogen bonding patterns where cationic complexes are linked via hydrogen bonds to their respective anions. [15] Recently, Beauchamp et al have shown that some bimH 2 Re III complexes form hydrogen bonds with halides or benzoate anions resulting in ion pairs that are stable in organic solvents.…”

Photophysical properties of homobimetallic Cu(i)–Cu(i) and heterobimetallic Cu(i)–Ag(i) complexes of 2-(6-bromo-2-pyridyl)-1H-imidazo[4,5-f][1,10]phenanthroline

“…However, the reported α-diimine-Cu( i )–diphosphine complexes so far mainly focused on homonuclear systems, and the heteronuclear analogues were rarely exploited. On the other hand, the electronic configurations and coordination modes of the Ag( i ) ions are similar to those of Cu( i ) ions, and the latter was confirmed by some pairs of isostructural and isomorphous Cu( i ) and Ag( i ) complexes such as [Cu 2 ( μ -bbim)(PPh 3 ) 4 ] 52 and [Ag 2 ( μ -bbim)(PPh 3 ) 4 ] (bbimH 2 = 2,2′-bi-(1 H )-benzimidazole), 53 [Cu 2 I 2 (PPh 3 ) 2 (4,4′-bpy)] 54 (4,4′-bpy = 4,4′-bipyridine) and [Ag 2 I 2 (PPh 3 ) 2 (4,4′-bpy)], 55 [Cu 2 (L)(PPh 3 ) 4 ] 2+ and [Ag 2 (L)(PPh 3 ) 4 ] 2+ cations (L = 2,3-bis(2-pyridyl)pyrazine), 56 as well as by the successfully synthesized mixed-metal complexes [(Cu x Ag 1− x ) 2 I 2 (PPh 3 ) 2 (bpy)] ∞ ( x < 0.01 or x = 0.15, 0.5) 57 and [Ag 0.55 Cu 1.45 ( μ -bbim)(PPh 3 ) 4 ]. 58 The complexes [(Cu x Ag 1− x ) 2 I 2 (PPh 3 ) 2 (bpy)] ∞ ( x < 0.01 or x = 0.15, 0.5) showed better luminescence behaviors than their parent complexes [Cu 2 I 2 (PPh 3 ) 2 (4,4′-bpy)] and [Ag 2 I 2 (PPh 3 ) 2 (4,4′-bpy)] due to the efficient energy transfer from Ag( i ) to Cu( i ) centers.…”