Issue 23, 2023

Cobalt(ii) coordination to an N4-acenaphthene-based ligand and its sodium complex

Abstract

A new bifunctional N4-ligand was obtained via the condensation reaction of acenaphthenequinone and 2-picolylamine. A peculiarity of this synthesis is the formation of a new intramolecular C–C bond during the reaction. The structure and redox properties of the ligand were studied. The anion-radical form of the ligand was prepared via the chemical reduction of the latter with metallic sodium as well as in situ via its electrochemical reduction in a solution. The sodium salt prepared was structurally characterized using single-crystal X-ray diffraction (XRD). New cobalt complexes with the ligand in neutral and anion-radical forms were synthesized and further studied. As a result, three new homo- and heteroleptic cobalt(II) complexes were obtained, in which the cobalt atom demonstrates different modes of coordination with the ligand. Cobalt(II) complex CoL2 with two monoanionic ligands was prepared by the electrochemical reduction of a related L2CoBr2 complex or by treating cobalt(II) bromide with the sodium salt. XRD was used to study the structures of all cobalt complexes prepared. Magnetic and electron paramagnetic resonance studies were performed: CoII ion states with S = 3/2 and S = 1/2 were found for the complexes. A quantum-chemical study confirmed that the spin density is mainly located at the cobalt center.

Graphical abstract: Cobalt(ii) coordination to an N4-acenaphthene-based ligand and its sodium complex

Supplementary files

Article information

Article type
Paper
Submitted
03 Feb 2023
Accepted
08 May 2023
First published
09 May 2023

Dalton Trans., 2023,52, 7876-7884

Cobalt(II) coordination to an N4-acenaphthene-based ligand and its sodium complex

V. V. Khrizanforova, R. R. Fayzullin, A. S. Bogomyakov, V. I. Morozov, R. G. Batulin, T. P. Gerasimova, D. R. Islamov and Y. H. Budnikova, Dalton Trans., 2023, 52, 7876 DOI: 10.1039/D3DT00347G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements