Pincer and Macrocyclic Pyridylidene Amide (PYA) AuIII Complexes.

Bukvic, Alexander J; Albrecht, Martin (2022). Pincer and Macrocyclic Pyridylidene Amide (PYA) AuIII Complexes. Inorganic chemistry, 61(35), pp. 14038-14045. American Chemical Society 10.1021/acs.inorgchem.2c02030

Text acs.inorgchem.2c02030.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (2MB)

Gold-based homogeneous catalysis is dominated by redox neutral AuI systems. Redox-active gold-based catalysts are less common, principally because of redox cycles between AuI and AuIII being hampered by unfavorable potentials. We report gold(III) complexes containing pincer-based, donor-flexible pyridylidene amide (PYA) ligands to address these issues. These complexes act as electron reservoirs through two limiting resonance structures consisting of either soft, imine coordination sites or harder, zwitterionic amide donors. We further alter the donor properties by using the ortho-, meta-, and para-pyridylidene amide variants of the PYA pincer arms. These bis-PYA pincer ligands exhibited a high contribution of amide coordination in the solid-state of the gold(III) complexes; however, the solution data suggests a high contribution from the neutral L-type resonance forms. This L-type contribution, primarily shown through cyclic voltammetry studies, prevents reversible gold(III) reduction and also disfavors abstraction of the ancillary chloride ligand. Furthermore, a novel macrocyclic-PYA ligand is introduced, which shows secondary metal-ligand interactions.

Interest & Impact

Downloads

1 since deposited on 23 Aug 2022
0 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item