Exo-Coordination-Based Supramolecular Silver(I) Complexes of S₂O Macrocycles:  Effect of Ligand Isomerism on the Structural Diversity

Abstract

An isomeric series of S2O macrocycles incorporating a xylyl group at the ortho (L1), meta (L2), and para (L3) positions were employed to examine the influence of the ring rigidity on silver(I) coordination modes in resulting supramolecular complexes (1-3); L1 and L3 afforded sandwich (1; Ag:L1 = 1:2) and infinite 1-D (3) complexes, respectively; otherwise, L2 gave the 1-D polymer (2a), 2:3 club sandwich (2b), and unique 2:4 bridged dinuclear complex (2c) complexes, in which their topologies vary with the solvent used.

Structural Diversity of Silver(I) 4,6-Dipyridyl-2-Aminopyrimidine Complexes: Effect of Counteranions and Ligand Isomerism

“…The structure of Ag(I) compounds can be controlled by the structure of organic ligands as well as counteranions. For example, the effect of ligand isomerism on the structural diversity of silver(I) complexes was examined by Lee and his co-workers . When 4-(2-pyridyl)pyrimidine reacted with AgBF 4 , AgCF 3 SO 3 , and AgNO 3 , the effect of conteranions on the structures was documented …”

“…For example, the effect of ligand isomerism on the structural diversity of silver(I) complexes was examined by Lee and his co-workers. 14 When 4-(2-pyridyl)pyrimidine reacted with AgBF 4 , AgCF 3 SO 3 , and AgNO 3 , the effect of conteranions on the structures was documented. 15 So we first chose different silver(I) salts to react with L1 ligands to explore the role of counteranions on resulting structures.…”

A Poly(bicyclic dimer) and a Cyclic Tetramer: Ligand Isomerism of S2O2 Macrocycles During the Assembly of Supramolecular Silver(I) Complexes

“…This approach is attractive because the exo coordination of sulfur donors5 to the metal ion offers the possibility of linking the ligand building blocks in diverse modes. We are interested in extending this to a ligand‐directed approach, such as ligand isomerism,6 in order to construct new supramolecular structures, including cyclic oligomer complexes based on dithiaoxa macrocycles. By using two positional isomers with different inter‐donor distances ( L 1 and L 2 ), we succeeded in generating two different cyclic oligomer complexes ( 1 and 2 ).…”

pseudo[1]Catenane-Type Pillar[5]thiacrown Whose Planar Chiral Inversion is Triggered by Metal Cation and Controlled by Anion

“…Indeed, the arrangement of three ligands (two terminal and one central), metal ions, and anions in 2 is unique, with an exo -coordination mode. For example, two mercury­(II) atoms (Hg1 and Hg2) locate out of thiacrown, forming a square-type Hg 2 I 4 cluster and these two clusters link three in-pS- L ligands to generate a club sandwich type 2:3 (cluster-to-ligand) complex , via Hg–S bonds [Hg1–S2 2.632(4) and Hg1–S3 2.526(4) Å]. In the ESI-MS measurement for 2 , however, the 1:1 complex [( in - pS - L )·HgI] + was confirmed as a major species (Figure S19).…”