Abstract
The mononuclear complex [Cu(rslysH)(OAc)]·4.5H2O (1) [rslys = 6-amino-2-[(2-hydroxybenzylidene)amino]hexanoate] has been prepared via an easy “one-pot” synthetic method in which the corresponding d/l-lysine-derived Schiff base ligand is generated in situ. Further, the dinuclear acetate-bridged Cu(II) complex, [Cu2(rslys)2(μ-OAc)]·(OH)·6H2O (2) was obtained as a minor product along with the mononuclear compound from a “one pot” crystallization. These complexes have been characterized by UV/vis, IR spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and single-crystal X-ray diffraction. The molecular structures of 2 confirm its dimeric nature with dicopper(II) phenolate and acetate-bridge environments. Variable-temperature magnetic analysis revealed a weak antiferromagnetic coupling interaction for the dicopper species mediated by the phenolate and bridging acetate groups. Large numbers of solvent water molecules are present in the lattice of the mononuclear compound 1. The carboxylate oxygen ...
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