Dinuclear N-heterocyclic carbene silver complexes: Synthesis, luminescence and catalytic studies

A new dibenzimidazole compound (1) and three dibenzimidazolium salts (2a-2c) were prepared. Reactions of these salts with silver(I) oxide in methanol led to dinuclear N-heterocyclic carbene silver complexes (3a-3c). All of the compounds were characterized by 1H NMR, 13C NMR and elemental analyses. M...

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Bibliographic Details
Published in:Journal of molecular structure 2019-03, Vol.1179, p.576-580
Main Authors: Demir Atlı, Deniz, Gülle, Sibel
Format: Article
Language:English
Subjects:
Coupling reaction
Luminescence
N-heterocyclic carbene
Silver
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Summary:A new dibenzimidazole compound (1) and three dibenzimidazolium salts (2a-2c) were prepared. Reactions of these salts with silver(I) oxide in methanol led to dinuclear N-heterocyclic carbene silver complexes (3a-3c). All of the compounds were characterized by 1H NMR, 13C NMR and elemental analyses. Molecular weights of the silver complexes were confirmed by MALDI-TOF mass spectrometry. Preliminary catalytic studies using all the silver complexes were performed on three-component coupling reaction of p-formaldehyde, piperidine and phenylacetylene. Complexes 3a and 3c exhibited good catalytic activities under neat conditions. The silver complexes showed luminescence properties in CH3CN at room temperature. [Display omitted] •New N-heterocyclic carbene precursors and their dinuclear silver complexes were synthesized and characterized.•Silver complexes were tested as catalysts in the coupling reaction of piperidine, p-formaldehyde and phenylacetylene.•Silver complexes were observed to be luminescent.
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2018.11.053