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![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
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[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Tetra-μ-acetato-κO:O'-bis-[(N-ethyl-pyrimidin-2-amine)-copper(II)](Cu-Cu).
Zaharah Aiyub1, Edura Badaruddin, Zanariah Abdullah
1Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Summary
This study details the crystal structure of a copper(II) acetate complex featuring N-ethyl-pyrimidin-2-amine ligands. The molecule exhibits bridging acetate groups and intermolecular hydrogen bonds, forming a crystal chain.
Area of Science:
- Coordination Chemistry
- Crystal Engineering
- Supramolecular Chemistry
Background:
- Copper(II) acetate complexes are known for their diverse structures and magnetic properties.
- Bridging ligands like acetate play a crucial role in forming polynuclear metal complexes.
- N-heterocyclic ligands can influence the coordination environment and crystal packing of metal complexes.
Purpose of the Study:
- To synthesize and characterize a novel copper(II) complex with acetate and N-ethyl-pyrimidin-2-amine.
- To elucidate the crystal structure and supramolecular assembly of the synthesized complex.
- To investigate the coordination geometry and intermolecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was used to determine the molecular and crystal structure.
- The crystal structure analysis involved identifying coordination environments, bridging ligands, and intermolecular interactions.
- Spectroscopic methods may have been used for preliminary characterization (though not explicitly stated in the abstract).
Main Results:
- The title molecule, [Cu(2)(CH(3)COO)(4)(C(6)H(9)N(3))(2)], was synthesized and its centrosymmetric crystal structure determined.
- Each copper(II) atom is coordinated by four acetate oxygen atoms and one nitrogen atom from the N-ethyl-pyrimidin-2-amine ligand, forming a distorted octahedral geometry.
- Four acetate groups bridge pairs of Cu(II) atoms, with a Cu-Cu distance of 2.6540(4) Å, indicative of a paddlewheel structure.
- An intramolecular N-H⋯O hydrogen bond links the ligand's N-H group to an acetate oxygen atom.
- Intermolecular C-H⋯O interactions link the molecules into a supramolecular chain along the b axis in the crystal.
Conclusions:
- The crystal structure reveals a paddlewheel-type copper(II) dimer bridged by acetate ligands, further coordinated by N-ethyl-pyrimidin-2-amine.
- Intramolecular hydrogen bonding and intermolecular C-H⋯O interactions play significant roles in stabilizing the molecular and supramolecular architecture.
- The study contributes to understanding the structural diversity and self-assembly of copper(II) carboxylate complexes.
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