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Bimetallic d 10 ‐Metal Complexes of a Bipyridine Substituted N‐Heterocyclic Carbene
Author(s) -
Kaub Christoph,
Lebedkin Sergei,
Li Alina,
Kruppa Sebastian V.,
Strebert Patrick H.,
Kappes Manfred M.,
Riehn Christoph,
Roesky Peter W.
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705757
Subject(s) - bimetallic strip , carbene , chemistry , transmetalation , metal , ligand (biochemistry) , bipyridine , dissociation (chemistry) , reagent , crystallography , medicinal chemistry , polymer chemistry , stereochemistry , crystal structure , catalysis , organic chemistry , biochemistry , receptor
The hybrid ligand 3‐(2,2′‐bipyridine‐6‐ylmethyl)‐1‐mesityl‐1 H ‐imidazolylidene (NHC Bipy ) featuring both carbene and N‐donor sites, was selectively complexed with various d 10 metal cations in order to examine its coordination behavior with regard to homo and heterometallic structures. Respective silver complexes can be obtained by the silver oxide route and are suitable transmetallation reagents for the synthesis of gold(I) compounds. Starting from the mononuclear complexes [(NHC Bipy )AuCl], [(NHC Bipy )Au(C 6 F 5 )] and [(NHC Bipy ) 2 Au][ClO 4 ], open‐chain as well as cyclic heterobimetallic complexes containing Cu + , Ag + , Zn 2+ , Cd 2+ , and Hg 2+ were synthesized. Furthermore, the homobimetallic species [(NHC Bipy ) 2 M 2 ][ClO 4 ] 2 (M=Cu, Ag) were obtained. All bimetallic compounds were fully characterized including single‐crystal X‐ray analysis. Their photoluminescence (PL) properties were investigated in the solid state at temperatures between 15 and 295 K and compared with those of the mononuclear species. There is a clear difference in PL properties between the open chain and the cyclic heterobimetallic complexes. The latter species show different PL properties, depending on the metals involved. In addition, collision‐induced dissociation (CID) experiments were performed on electrosprayed cations of the cyclic heterobimetallic compounds, to compare the metal binding at the carbene and N‐donor sites.