Einfaches System, vielfältige Strukturen: Eine Neuuntersuchung der (Amin)halogenidosilber(I)-Komplexe/ A Simple System with many Structural Variants: A Reexamination of (Amine)halogenidosilver(I) Complexes

Abstract

We report the structures of nineteen new amine silver halide complexes, some of them featuring previously unknown structure types, stoichiometries (such as L 4 Ag 5 X 5 ) and coordination numbers. Known structures have been included and analysed for non-classical hydrogen bonds. We have identified three important factors for the formation of certain structure types. First, Ag-X bonds that form a central framework, typically staircase-shaped. Secondly, hydrogen bonds or other secondary interactions competing with these leading to a weakening or disappearance of some of the central Ag-X bonds. Finally, the polarity of the substituent at nitrogen and the silver halides influence the stoichiometry of the complex.

Learning about Steric Effects in NHC Complexes from a 1D Silver Coordination Polymer with Fréchet Dendrons

“…Although single-stranded Ag(I) coordination polymers are common, they are typically accessible by means of bidentate ligands bridging the metal atoms, whereas those exclusively enchained by halide bridges are rare . Indeed, the complex (phen)AgCl is the only precedent in the Cambridge Structural Database (CSD) of an unsupported zigzag −(Ag(halide)) n – chain .…”

A novel approach for estimating the strength of argentophilic and aurophilic interactions using QTAIM parameters

“…Additional examples comprise discrete dimers formed in (pyrazine N -oxide)-(trifluoroacetato)-silver( i ) ( POKHEE ) 43 and benzylamino-chloro-silver( i ) ( YUXVUJ ) 44 structures (Fig. 1d and e).…”

“…In all cases, a bond critical point (BCP) was found interconnecting the Regium atoms (AgÁ Á ÁAg/AuÁ Á ÁAu) and its electron density and derivatives of the latter were subtracted and analysed, using the Multiwfn software. 39 Additional examples comprise discrete dimers formed in (pyrazine N-oxide)-(trifluoroacetato)-silver(I) (POKHEE) 43 and benzylamino-chloro-silver(I) (YUXVUJ) 44 structures (Fig. 1d and e).…”

“…1a) the (m 2 -ethane-1,2-diamine)dichloro-di-silver(I) molecules propagate forming 1D polymers via the formation of AgÁ Á ÁAg interactions in combination with H-bonding interactions. 1D infinite assemblies are also observed in HAMMIS 41 and LURDIM 42 structures, both are diammine-silver(I) salts (counteranions are omitted for clarity) that form either symmetric (HAMMIS) or asymmetric AgÁ Á ÁAg interactions (LURDIM).Additional examples comprise discrete dimers formed in (pyrazine N-oxide)-(trifluoroacetato)-silver(I) (POKHEE)43 and benzylamino-chloro-silver(I) (YUXVUJ)44 structures (Fig.1d and e). In BURVER45 (Fig.1f), two Ag(I) ions promote the formation of a macrocycle by connecting two m-4,4 0 -(1,2phenylenebis(methylene-sulfanediyl))bispyridine units via Ag-N coordination bonds.…”

Crystal structures of five gold(I) complexes with methylpiperidine ligands

“…Nine complexes of 4-Me-pip appear in the CSD, seven of which display the usual equatorial positions of the metal atoms and methyl groups. The exceptions, with equatorial methyl groups but axially positioned metal atoms, are provided by two silver complexes studied by us (Jones & Wo ¨lper, 1975;Wo ¨lper et al, 2010), namely [(AgCl) 5 (4-Me-pip) 4 ] (GAQLEQ) and the polymeric [(AgBr) 3 (4-Me-pip) 2 ] (YUXWOE), which contain one and six independent ligands, respectively. This reinforces our observation that coinage metals have a higher tendency to be axial at piperidine ligands.…”