Trigonal planar clusters Ag@Ag3 supported by (2-PyCH2)3P ligands

Synthesis, structure diversity, and antimicrobial studies of Ag(i) complexes with quinoline-type ligands

“…S4 †). 1 H NMR (500 MHz, DMSOd 6 ), δ H : 9.13 (d, J = 1.5 Hz, 1H, Ar-H), 9.05 (d, J = 2.5 Hz, 1H, Ar-H), 8.08 (t, J = 9.0 Hz, 2H, Ar-H), 7.94 (t, J = 8.5 Hz, 1H, Ar-H), 7.74 (t, J = 8.0 Hz, 1H, Ar-H); 13 2.1.3 Crystallographic measurements. The crystal structures of 1 and 2 were determined using the procedures described in the ESI † (Method S1).…”

“…Their structures were confirmed using FTIR, 1 H-NMR, and 13 C-NMR. The FTIR spectra of the synthesized complexes compared to those of the corresponding free ligands are presented in Fig.…”

“…In addition, the 1 H NMR and 13 C NMR spectra (see the ESI †) of both complexes showed a characteristic small shift in the signals compared to those of the free ligands which might be evidence for the presence of coordinated ligands in solution 38,59,60 However, the exact nature and mix of Ag(I) species in solution remain elusive. Typically these complexes have fast ligand exchange on the NMR scale and the equilibrium may favour substantial proportions of free ligands under stoichiometric conditions, hence the small NMR shift changes and also the noticeably smaller shift changes for 2 that has half the ligand/Ag ratio compared to 1.…”

“…The coordination geometry of Ag( i ) complexes can thus be linear, 8–11 trigonal planar, 12–14 T-shaped, 15,16 square planar, 17,18 tetrahedral, 19,20 trigonal bipyramidal, 21,22 square pyramidal, 23,24 and octahedral. 25–27…”

“…The coordination geometry of Ag(I) complexes can thus be linear, [8][9][10][11] trigonal planar, [12][13][14] T-shaped, 15,16 square planar, 17,18 tetrahedral, 19,20 trigonal bipyramidal, 21,22 square pyramidal, 23,24 and octahedral. [25][26][27] These complexes show a wide range of biological activities against bacteria, fungi, viruses, and cancerous cells.…”