Synthesis and structural characterization of new dinuclear silver(I) complexes: Different coordination modes of substituted 1,2,4-triazine ligands

Synthesis, Crystal Structure and Thermal Stability of 1D Linear Silver(I) Coordination Polymers with 1,1,2,2-Tetra(pyrazol-1-yl)ethane

“…In accordance with τ 5 criteria [29] (Table 3), the silver coordination environment corresponds to a distorted trigonal bipyramid with two nitrogen atoms of different ligands in apical positions. The Ag-N bond distances vary in a wide range of 2.31-2.62 Å, giving strongly distorted metallacycles (Table 4), which is typical for Ag complexes in the five-atomic environment [30][31][32]. The bond distances of Pz 4 in the complexes are very close and are in accordance with those in known compounds with this ligand [21,22].…”

A Luminescent Cage‐Like Complex Constructed by Bidentate Pyridine‐Containing Ligand and Silver Nitrate

“…Interestingly, the cage‐like unit may be described with channels of 5.493(2) × 2.929(1) Å 2 along the b axis and 2.929(1) × 5.165(2) Å 2 along the c axis, which is not an empty void but filled with the pyridyl ring of a neighboring molecule, thus resulting in a pretty close and dense packing. Similar π–π interactions with the distances of 3.39–3.80 Å and hydrogen‐bonding interactions with the distances of 2.30–2.71 Å have been reported to be found in some polymeric silver(I) complexes with aromatic ligands 34. Similarly, the cage‐like units are cohered together by π–π stacking interactions (3.663 Å) between the terminal pyridine rings and middle benzene rings from different ligands to generate the 1D chain (Figure 2a).…”

Palladium(II) Complexes of Ambidentate and Potentially Cyclometalating 5‐Aryl‐3‐(2′‐pyridyl)‐1,2,4‐triazine Ligands

“…A closer look at the signal of 6‐H, located on the triazine ring, reveals a general low‐field shift of this proton signal upon coordination, which points to the coordination of Pd to the triazine N2 TZ atom (isomer A in Scheme ) and not to the N4 atom (isomer B in Scheme ). This coordination mode has so far been observed exclusively for transition‐metal complexes of 5‐aryl‐substituted 3‐(2′‐pyridinyl)‐1,2,4‐triazine ligands, , , , , and has been explained by the lower steric hindrance through the 5‐aryl group. The new complexes were reasonably soluble in polar solvents, such as DMSO and DMF, and slightly soluble in CH 2 Cl 2 and THF.…”

“…The 5‐aryl‐3‐(2′‐pyridyl)‐1,2,4‐triazine moieties themselves have been used for decades as versatile ligands for transition‐metal complexes with some medical or technical applications. The most important application is probably that of 3‐(2‐pyridyl)‐5,6‐diphenyl‐1,2,4‐triazine‐ p , p′ ‐disulfonic acid [PyTZ(HO 2 SOPh) 2 ], following the nomenclature in Scheme , also called FerroZine™, for the colorimetric detection of Fe II in biological or other systems .…”