Structural Variety in Transition Metal Complexes of Tripodal Ligands Containing Mixed Quinolyl and Pyridyl Donors
The syntheses of the tripodal tetraamine ligands 2-(pyridin-2-yl)-N,N-bis(quinolin-2-ylmethyl)ethan-1-amine (DQPEA), N-(pyridin-2-ylmethyl)-2-(quinolin-2-yl)-N-(2-(quinolin-2-yl)ethyl)ethan-1-amine (DQEPMA), 2-(pyridin-2-yl)-N,N-bis(2-(quinolin-2-yl)ethyl)ethan-1-amine (DQEPEA), N,N-bis(pyridin-2-ylmethyl)-2-(quinolin-2-yl)ethan-1-amine (QEDPMA), and 2-(pyridin-2-yl)-N-(2-(pyridin-2-yl)ethyl)-N-(2-(quinolin-2-yl)ethyl)ethan-1-amine (QEDPEA) containing mixed quinolyl and pyridyl moieties are reported, with 2-vinylquinoline being used to attach quinolylethyl arms to the aliphatic N atom. X-ray crystal structures of [(Mn(DQPEA))<sub>2</sub>O<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub> ⋅ (CH<sub>3</sub>CN)<sub>2</sub>, [Cu(DQPEA)NCCH<sub>3</sub>](ClO<sub>4</sub>)<sub>2</sub>, [Zn(DQPEA)NCCH<sub>3</sub>](ClO<sub>4</sub>)<sub>2</sub>, [Pd(DQEPEA)Cl]Cl ⋅ 11H<sub>2</sub>O are detailed, with four, five, and six-coordination observed. In addition, the dimeric complex [(DPEA)Co(μ-OH)<sub>3</sub>Co(DPEA)](ClO<sub>4</sub>)<sub>3</sub> ⋅ 0.5H<sub>2</sub>O ⋅ MeCN containing the tridentate DPEA ligand formed by N-dealkylation of QEDPEA is reported. Calculations suggest that the very short Co…Co distance of 2.5946(6) Å in this complex is unlikely to be due to a Co-Co bond.
Authors
- Cassandra L. Fleming (ORCID: https://orcid.org/0000-0002-7730-7305)
- Bronte Carr (ORCID: https://orcid.org/0009-0003-5454-7060)
- Tilo Söhnel (ORCID: https://orcid.org/0000-0003-4472-5807)
- Timothy Daniel Christopher (ORCID: https://orcid.org/0000-0001-6494-8480)
- Allan G. Blackman (ORCID: https://orcid.org/0000-0002-6541-0057)
- Lawrence R. Gahan (ORCID: https://orcid.org/0000-0002-4724-6994)
Institutions
- The University of Sydney (AU)
- University of Auckland (NZ)
- The University of Queensland (AU)
- Auckland University of Technology (NZ)
- Victoria University of Wellington (NZ)
- MacDiarmid Institute for Advanced Materials and Nanotechnology (NZ)
Publication Details
- Journal
- ChemistryOpen
- Published
- 2024-10-23
- DOI
- https://doi.org/10.1002/open.202400304
- Primary Topic
- Metal complexes synthesis and properties
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Auckland University of Technology, New Zealand
- National Computational Infrastructure
- Research Computing Centre, University of Queensland