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Trinuclear Heterobimetallic Complexes by Stepwise Metalation of a Macrocyclic Tetraimidazolium Salt
Author(s) -
Schulte to Brinke Christian,
Hahn F. Ekkehardt
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500519
Subject(s) - metalation , chemistry , transmetalation , salt (chemistry) , ligand (biochemistry) , carbene , medicinal chemistry , stereochemistry , polymer chemistry , organic chemistry , catalysis , receptor , biochemistry
A series of trinuclear heterobimetallic Au I /M 2 (M = Rh III , Ir III , Ru II ) complexes were prepared by the stepwise and selective metalation of a rigid cyclic tetraimidazolium salt. Reaction of the tetraimidazolium salt with exactly 1 equivalent of silver oxide and transmetalation of the dicarbene ligand to Au I yielded selectively a mononuclear Au I complex. This complex features an C NHC –Au–C NHC unit obtained by coordination of two N‐heterocyclic carbene (NHC) donors placed in diagonal positions within the macrocycle and two non‐metalated imidazolium moieties. Subsequent metalation of these imidazolium groups yielded heterobimetallic complexes (Au I /Rh III 2 , Au I /Ir III 2 , and Au I /Ru II 2 ) with Au ··· M separations shorter than 5.5 Å.