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Self‐Assembly of Benzimidazole‐Derived Tris‐NHC Ligands and Ag I ‐Ions to Hexanuclear Organometallic Cages and Their Unusual Transmetalation Chemistry
Author(s) -
Nishad Rajeev C.,
Rit Arnab
Publication year - 2021
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.202003937
Subject(s) - transmetalation , chemistry , benzimidazole , carbene , crystallography , tris , ligand (biochemistry) , organometallic chemistry , nuclear magnetic resonance spectroscopy , nmr spectra database , ion , group 2 organometallic chemistry , stereochemistry , molecule , crystal structure , spectral line , organic chemistry , catalysis , biochemistry , receptor , physics , astronomy
Abstract Multi‐ligand self‐assembly to attain the Ag I ‐N‐heterocyclic carbene (NHC)‐built hexanuclear organometallic cages of composition [Ag 6 ( 3 a , b ) 4 ](PF 6 ) 6 from the reaction of benzimidazole‐derived tris(azolium) salts [H 3 ‐ 3 a , b ](PF 6 ) 3 with Ag 2 O was achieved. The molecular structures of the cages were established by X‐ray diffraction studies along with NMR and MS analyses. The existence of a single assembly in solution was supported by diffusion‐ordered spectroscopy (DOSY) 1 H NMR spectra. Further, transmetalation reactions of these self‐assembled complexes, [Ag 6 ( 3 a , b ) 4 ](PF 6 ) 6 , with Cu I /Au I ‐ions provided various coinage metal‐NHC complexes having diverse molecular compositions, which included the first example of a hexanuclear Cu I ‐dodecacarbene complex, [Cu 6 ( 3 b ) 4 ](PF 6 ) 6 .