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Front Cover: Use of Crown Ether Functions as Secondary Coordination Spheres for the Manipulation of Ligand–Metal Intramolecular Electron Transfer in Copper–Guanidine Complexes (Chem. Eur. J. 3/2021)
Author(s) -
Haaf Sebastian,
Kaifer Elisabeth,
Wadepohl Hubert,
Himmel HansJörg
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004294
Subject(s) - intramolecular force , chemistry , guanidine , ligand (biochemistry) , coordination sphere , crown ether , electron transfer , acetonitrile , redox , metal , copper , coordination complex , ether , photochemistry , combinatorial chemistry , polymer chemistry , inorganic chemistry , stereochemistry , organic chemistry , receptor , ion , biochemistry
The directed stimulation of intramolecular electron transfer (IET) between a metal and a redox‐active ligand in a coordination compound is important for a variety of applications in catalysis or material science. In this work we show that stimulation of IET is possible by metal coordination at a secondary coordination sphere. A copper complex with a redox‐active guanidine ligand and a remote crown ether function, dissolved in acetonitrile, could be present as Cu I complex with a radical monocationic guanidine ligand or as Cu II complex with a neutral guanidine ligand. The preferred electronic structure could be controlled by metal encapsulation into the crown ether function. More information can be found in the Full Paper by H.‐J. Himmel et al. on page 959.