Self-Assembly of Molecular Cylinders from Polycarbene Ligands and Ag^I or Au^I

Abstract

Tris- and tetrakis(imidazolium) salts react with Ag(2)O to give cylindrical polynuclear silver(I) complexes such as the tetrasilver derivative [Ag(4)(1)(2)](PF(6))(4). The silver(I) complexes undergo transmetalation with [AuCl(SMe(2))] to yield homonuclear gold(I) complexes with retention of the metallosupramolecular assembly.

Carbenes Made Easy: Formation of Unsymmetrically Substituted N‐Heterocyclic Carbene Complexes of Palladium(II), Platinum(II) and Gold(I) from Coordinated Isonitriles and their Catalytic Activity

“…[25] Signal multiplicity was determined as s (singlet), d (doublet), t (triplet), q (quartet) or m (multiplet). 13 C assignment was achieved via DEPT90 and DEPT135 or HSQC-me spectra. Mass spectra were recorded on a Vacuum Generators ZAB-2F, Finnigan MAT TSQ 700 or JEOL JMS-700 spectrometer.…”

“…In addition to this very popular use in catalysis, NHC complexes are equally useful in many other fields like medical applications, [11] nanoparticles and supramolecular chemistry, [12] self-assembly, [13] photochemistry, [14] liquid crystals, [15] polymerisation [16] and electronically active materials [17] as recently sum-A C H T U N G T R E N N U N G marised [18a] and highlighted.…”

Synthesis and Characterization of Gold(I) and Gold(III) Complexes Derived from Benzimidazolin‐2‐ylidene Ligands

“…Recently, poly-NHC ligands have also been used as building blocks for metallo-supramolecular structures. Linear di- [4] as well as tri-or tetra-NHC ligands [5] were employed for the generation of molecular rectangles or cylindrical molecules, which provide cavities suitable as host for guest molecules during a catalytic reaction [6].…”

Rotaxanes and pseudorotaxanes with threads containing pyridinium units

“…Recently N-heterocyclic carbenes have been widely investigated; they are used in construction of three-dimensional structures 54,55 and of metalla-macrocycles. 56,57 As an example of rotaxanes stoppered by palladium N-heterocyclic carbene may serve [2]rotaxane 12, obtained from bis(dipyridiniumyl)ethane 5 and dibenzo [24]crown-8 (DB24C8) in the presence of dimeric Pd(II)benzimidazolin-2-ylidene complex [PdBr 2 (i-Pr 2 -bimy)] 2 .…”