A series of protic N-heterocyclic carbene ligand precursors based on theophylline or adenine has been prepared, and the reactivity and coordination chemistry of these proligands towards iridium(III) centers has been investigated. Complex formation appears to be highly dependent on the proligand structure. In one case, a particularly stable complex is formed that enables fully reversible protonation/deprotonation of the coordinated NHC moiety. The acidity constant of the protonated complex was consequently determined.
Coordination Chemistry of Ir with Chelating Ligands Containing a Xanthine-Derived, Protic N-Heterocyclic Carbene (NHC) Moiety / Bevilacqua, M.; Giuso, V.; Rancan, M.; Armelao, L.; Graiff, C.; Baratta, W.; Di Marco, V.; Biffis, A.. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - 2022:34(2022). [10.1002/ejic.202200484]
Coordination Chemistry of Ir with Chelating Ligands Containing a Xanthine-Derived, Protic N-Heterocyclic Carbene (NHC) Moiety
Graiff C.;
2022-01-01
Abstract
A series of protic N-heterocyclic carbene ligand precursors based on theophylline or adenine has been prepared, and the reactivity and coordination chemistry of these proligands towards iridium(III) centers has been investigated. Complex formation appears to be highly dependent on the proligand structure. In one case, a particularly stable complex is formed that enables fully reversible protonation/deprotonation of the coordinated NHC moiety. The acidity constant of the protonated complex was consequently determined.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
