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Structure and spectroscopic properties of the dimeric copper(I) N‐heterocyclic carbene complex [Cu 2 (CNC t ‐Bu ) 2 ](PF 6 ) 2
Author(s) -
Riener Korbinian,
Pöthig Alexander,
Cokoja Mirza,
Herrmann Wolfgang A.,
Kühn Fritz E.
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615012140
Subject(s) - carbene , copper , pyridine , chemistry , crystallography , luminescence , metal , ligand (biochemistry) , catalysis , stereochemistry , medicinal chemistry , materials science , organic chemistry , biochemistry , receptor , optoelectronics
In recent years, the use of copper N‐heterocyclic carbene (NHC) complexes has expanded to fields besides catalysis, namely medicinal chemistry and luminescence applications. In the latter case, multinuclear copper NHC compounds have attracted interest, however, the number of these complexes in the literature is still quite limited. Bis[μ‐1,3‐bis(3‐ tert ‐butylimidazolin‐2‐yliden‐1‐yl)pyridine]‐1κ 4 C 2 , N : N , C 2′ ;2κ 4 C 2 , N : N , C 2′ ‐dicopper(I) bis(hexafluoridophosphate), [Cu 2 (C 19 H 25 N 5 ) 2 ](PF 6 ) 2 , is a dimeric copper(I) complex bridged by two CNC, i.e. bis(N‐heterocyclic carbene)pyridine, ligands. Each Cu I atom is almost linearly coordinated by two NHC ligands and interactions are observed between the pyridine N atoms and the metal centres, while no cuprophilic interactions were observed. Very strong absorption bands are evident in the UV–Vis spectrum at 236 and 274 nm, and an emission band is observed at 450 nm. The reported complex is a new example of a multinuclear copper NHC complex and a member of a compound class which has only rarely been reported.