A range of palladium complexes featuring electronically modified, imidazole-based abnormal N-heterocyclic carbene (aNHC) ligands have been prepared in the hopes of accessing a new class of cationic aNHC ligands electronically distinct from normal NHCs and aNHCs. These palladium complexes represent the first examples of transition metal-ligated aNHC complexes featuring a cationic moiety adjacent to the abnormal carbene center. It was anticipated that these design principles could facilitate electron transfer between the imidazolinylidene and the cationic heterocycle, thus reducing the electron density at the abnormal carbene center. However, this case study suggests that greater conformational restrictions that allow for heterocycle coplanarity are necessary to achieve significant electron transfer and enable access to a new class of cationic charge-appended aNHCs with unique electronic properties.

Item Type:	Refereed Article
Keywords:	normal N-heterocyclic carbenes, abnormal N-heterocyclic carbenes, palladium
Research Division:	Chemical Sciences
Research Group:	Inorganic chemistry
Research Field:	Transition metal chemistry
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in the chemical sciences
UTAS Author:	Vanston, CR (Ms Catriona Vanston)
UTAS Author:	Nicholls, TP (Mr Thomas Nicholls)
UTAS Author:	Bissember, AC (Associate Professor Alex Bissember)
UTAS Author:	Gardiner, MG (Associate Professor Michael Gardiner)
UTAS Author:	Ho, CC (Dr Curtis Ho)
ID Code:	148442
Year Published:	2022
Deposited By:	Chemistry
Deposited On:	2022-01-11
Last Modified:	2022-04-14
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