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

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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.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Bukvic, Alexander James, Albrecht, Martin


500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
000 Computer science, knowledge & systems




American Chemical Society




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Date Deposited:

23 Aug 2022 13:46

Last Modified:

05 Dec 2022 16:22

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