Related Experiment Video
Updated: May 14, 2026
![[(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)
[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
rac-Dichlorido[3-eth-oxy-3-(1-ethyl-1H-benzimidazol-2-yl)-2,3-dihydro-1H-pyrrolo-[1,2-a]benzimidazole]-copper(II)
Robert T Stibrany1, Joseph A Potenza
1Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, USA.
Abstract:
The title complex, [CuCl(2)(C(21)H(22)N(4)O)], contains a bis-(benzimidazole) unit with a chiral bridgehead C atom that forms part of a tetra-hydro-pyrrole ring fused to one of the benzimidazoles. The chelate angle is 90.45 (9)° and the dihedral angle between the essentially planar benzimidazole fragments is 26.68 (9)°. The Cu(II) coordination geometry lies approximately midway between tetra-hedral and square planar. Overall, each chiral mol-ecule contains six fused rings, and a racemic mixture is formed with symmetry-related enanti-omers. In the crystal, C-H⋯π and C-H⋯Cl inter-actions link mol-ecules into a supra-molecular chain along the a-axis direction.
More Related Videos
Related Concept Videos
Extraction: Advanced Methods
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.

