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Issue 15, 2018
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N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry

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Abstract

The direct dialkylation of triazolo[4,3-b]isoquinolin-3-ylidene structures readily affords dicationic N-heterotricyclic azolium salts. These are suitable starting materials for the synthesis of transition metal complexes containing N-heterotricyclic, cationic ligands characterized by extended charge delocalization. Silver and gold complexes as well as mono- and dicationic rhodium(I) complexes have been prepared and characterized, and the electronic properties of the ligand have been evaluated by using the TEP parameter and by comparison with a non-cationic analogue. X-Ray diffraction analysis of several carbene–metal complexes shows a negligible effect of the charge on the structures of the complexes. The catalytic activity of a tricationic gold complex has been evaluated in the intramolecular hydroarylation of a terminal alkyne.

Graphical abstract: N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry

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Publication details

The article was received on 17 Jan 2018, accepted on 20 Feb 2018 and first published on 22 Feb 2018


Article type: Paper
DOI: 10.1039/C8DT00213D
Citation: Dalton Trans., 2018,47, 5196-5206
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    N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry

    J. Iglesias-Sigüenza, C. Izquierdo, E. Díez, R. Fernández and J. M. Lassaletta, Dalton Trans., 2018, 47, 5196
    DOI: 10.1039/C8DT00213D

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