Issue 24, 2023

Conformational dynamicity in a copper(ii) coordination complex

Abstract

The geometries of copper coordination complexes are intricately related to their electron transfer capabilities, but the role of dynamics in these processes are not fully understood. We have previously reported CuCl(dpaOMe), a complex exhibiting conformational fluxionality in its CuI state and rigidity upon oxidation to CuII. Here, we report the synthesis and characterization of [CuCl(dpaSMe)]+/0, a complex exhibiting relative rigidity in its CuI state and structural dynamics upon oxidation to CuII. The dynamics of [CuCl(dpaSMe)]+ were characterized via X-ray diffraction, cyclic voltammetry, and EPR spectroscopy, where temperature-dependent interconversion between trigonal bipyramidal and square pyramidal geometries is observed. Coupling these solid and solution-state characterization data enabled assignment of the coordination geometries involved. Factors impacting these dynamics and their potential implications for electron transfer are discussed.

Graphical abstract: Conformational dynamicity in a copper(ii) coordination complex

Supplementary files

Article information

Article type
Paper
Submitted
23 Apr 2023
Accepted
28 May 2023
First published
29 May 2023

Dalton Trans., 2023,52, 8376-8383

Author version available

Conformational dynamicity in a copper(II) coordination complex

P. J. Griffin, M. J. Dake, A. D. Remolina and L. Olshansky, Dalton Trans., 2023, 52, 8376 DOI: 10.1039/D3DT01213A

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