Conformation driven complexation of two analogous benzimidazole based tripodal ligands with Ag(I) resulting in a trigonal prism and a coordination polymer

Abstract

Two analogous tripodal ligands, namely, 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-triethylbenzene (1-Et) and 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-trimethoxybenzene (1-OMe) have been used for complexation with silver(I) tetrafluoroborate. A trinuclear Ag(I) salt, formulated as [Ag 3 (1-Et) 2 ] 3+ (BF 4) − 3 •7CH 3 CN• yH 2 O was formed in the complexation reaction of 1-Et with silver(I) tetrafluoroborate, which consists of a trigonal prismatic cation formed by three bicoordinated Ag(I) coordinated with two 1-Et ligands. In case of the 1-OMe ligand, however, a one dimensional ladder, formulated as [(Ag(1-OMe)OH 2) + (BF 4) − •MeOH] ∞ was obtained which is constituted of a tetracoordinated Ag(I) center in a distorted tetrahedral environment. The crystal structures of the ligand hydrates namely 1-Et•H 2 O and 1-OMe•3.6H 2 O have been discussed along with the structure of methanol solvate-hydrate of 1-Et. The imidazole rings of the Bim groups in 1-Et in the crystal structures of the ligand as well as in its coordination complex with the Ag(I) are pointed inward with respect to the central ring, whereas it is pointed outwards in the crystal structures of 1-OMe as well as its Ag(I) complex.

Polynuclear and one-dimensional cyanide-bridged heterobimetallic complexes: synthesis, crystal structures and magnetic properties

“…Several silver polymer examples with diverse structures and interesting optical properties have been reported. [34][35][36] In this paper, we report the investigation of the reactions of trans-dicyanometallate (1), whose structure has also been crystallographically characterized, or Schiff-base manganese(III) compounds, resulting in three cyanidebridged bimetallic complexes with different structure…”

Dimeric iodine(i) and silver(i) cages from tripodal N-donor ligands via the [N–Ag–N]+ to [N–I–N]+ cation exchange reaction

“…S3†). In addition, cages [BF 4 -⊂3-Ag-3][BF 4 ] 2 18 and [BF 4 -⊂4-Ag-4][BF 4 ] 2 21 have been X-ray structurally characterised. In total, 11 single crystal X-ray structures of the analogous silver( i ) cages were determined (Fig.…”

“…The X-ray structures of ligands 1-5 have been previously reported, 21,[57][58][59][60] as well as the [X-⊂1-Ag-1][X] 2 cages with various counter-anions. 17,20,61,62 For 1 and 2, other topologies including polymeric structures have been reported, 17,61 which is not the case for the larger ligands 3-6.…”

“…6,7 To date, various host–guest capsular assemblies have been reported using molecules such as resorcin[4]arenes, 8–11 calix[4]-arenes, 12–14 and pyridine[4]arenes. 15,16 The self-assembled capsular assemblies comprise two or more suitable preorganised molecules spontaneously forming capsular entities with either metal coordination, 17–21 or hydrogen bonding. 22,23…”

“…6,7 To date, various host-guest capsular assemblies have been reported using molecules such as resorcin [4]arenes, [8][9][10][11] calix [4]-arenes, [12][13][14] and pyridine [4]arenes. 15,16 The selfassembled capsular assemblies comprise two or more suitable preorganised molecules spontaneously forming capsular entities with either metal coordination, [17][18][19][20][21] or hydrogen bonding. 22,23 Ever since the 1990s, halogen bonding has developed into a true competitor for hydrogen bonding and other non-covalent interactions to the point that, to date, it is one of the most studied interactions in supramolecular chemistry.…”