Syntheses and properties of binuclear copper(II) mixed-ligand complexes involving thiodiglycolic acid. The crystal structures of [(phen)2Cu(m-tdga)Cu(phen)](NO3)2x5H2O and [(H2O)(pmdien)Cu(micro-tdga)Cu(pmdien)(H2O)](ClO4)

Kopel, P.; Trávníček, Zdeněk; Marek, J.; Korabik, M.; Mrozinski, J.
POLYHEDRON 22: 411-418, 2003

Klíčová slova: Copper(II); Thiodiglycolic acid complexes; Crystal structures
Abstrakt: Mixed-ligand binuclear Cu(II) complexes involving thiodiglycolate(2 /) anion and nitrogen-donor ligands in the coordination sphere of composition [(phen)2Cu(m-tdga)Cu(phen)](NO3)2 /5H2O (1) and [(H2O)(pmdien)Cu(m-tdga)Cu(pmdien)(H2O)](ClO4)2 (2), where phen /1,10-phenanthroline, H2tdga /thiodiglycolic acid, pmdien /N,N,N,N-pentamethyldiethylenetriamine, have been prepared. Temperature dependence of magnetic susceptibility, EPR spectroscopy and single crystal X-ray analysis has been used to characterize these compounds. Magnetic susceptibility measurements over the 1.9.I./300 K temperature range revealed a weak antiferromagnetic interaction between two copper atoms with the exchange integral value 2J=-4.80 cm-1 for 1 and -0.71 cm-1 for 2. The bridging dianion of thiodiglycolic acid is coordinated in each of the two complexes in a different manner.
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