Premium
Dinuclear Cu II Complexes with a New Phenol‐Based Ligand Bearing Pyridine and Thiophene Substituents: Synthesis, Characterization and Interaction with Catechol Substrates
Author(s) -
Koval Iryna A.,
Huisman Mieke,
Stassen Arno F.,
Gamez Patrick,
Roubeau Olivier,
Belle Catherine,
Pierre JeanLouis,
SaintAman Eric,
Lüken Matthias,
Krebs Bernt,
Lutz Martin,
Spek Anthony L.,
Reedijk Jan
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400092
Subject(s) - chemistry , trigonal bipyramidal molecular geometry , square pyramidal molecular geometry , magnetochemistry , ligand (biochemistry) , pyridine , bromide , crystallography , deprotonation , thiophene , catechol , copper , stereochemistry , medicinal chemistry , inorganic chemistry , crystal structure , ion , organic chemistry , biochemistry , receptor
The reaction of the phenol‐based ligand 4‐methyl‐2,6‐bis{[(2‐methylpyridyl)(2‐methylthiophenyl)amino]methyl}phenol(Hpy2th2s), containing pyridine and thiophene substituents, with copper( II ) chloride and bromide yields two new dinuclear complexes with the composition [Cu 2 (py2th2s)X 3 ], where X = Cl or Br. In both complexes, the copper( II ) ions are pentacoordinate and bridged by the deprotonated phenolate anion and by one halogen anion. Both complexes exhibit geometric asymmetry, as the coordination environment around one of the two copper ions is square‐pyramidal, whereas the geometry around the other can be best described as a distorted trigonal bipyramid. The complexes were characterized by means of X‐ray single‐crystal diffraction, ligand field and EPR spectroscopy, mass spectrometry, and electrochemically. Magnetic susceptibility measurements indicate an antiferromagnetic coupling between the two metal centers (2 J ≈ −200 cm −1 ). The interaction of the complexes with model substrates 3,5‐di‐ tert ‐butylcatechol and tetrachlorocatechol is reported. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)