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Cationic charge-appended abnormal carbenes: synthesis and study of electronically modified abnormal N-heterocyclic carbenes
journal contribution
posted on 2023-05-21, 05:05 authored by Vanston, CR, Nicholls, TP, Alexander BissemberAlexander Bissember, Michael GardinerMichael Gardiner, Curtis HoCurtis HoA 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.
History
Publication title
Inorganic ChemistryVolume
61Pagination
622-632ISSN
0020-1669Department/School
Recruitment and InternationalPublisher
Amer Chemical SocPlace of publication
1155 16Th St, Nw, Washington, USA, Dc, 20036Rights statement
Copyright 2021 American Chemical SocietyRepository Status
- Restricted