Synthesis, Crystal Structure, and Properties of a Binuclear Copper(II) Complex Containing an Oxalate Bridge

Abstract

The complex [Cu 2 (L) 2 (µ 2 -C 2 O 4 )]·CH 3 OH (1) has been synthesized and characterized by IR, UV, ESR and variable temperature magnetic susceptibility measurement, where L ϭ 1-(ethylamino)-2-(salicylideneamino)ethane. The crystal X-ray diffraction reveals that complex 1 has a µ 2 -C 2 O 4 2Ϫ bridge. The complex exhibits ferromagnetic couplings between the copper atoms bridged Synthese, Kristallstruktur und Eigenschaften eines zweikernigen Kupfer(II)-Komplexes mit einer OxalatbrückeInhaltsübersicht. Der Komplex [Cu 2 (L) 2 (µ 2 -C 2 O 4 )]·CH 3 OH(1)(L ϭ 1-(ethylamino)-2-(salicylidenamino)ethan) wurde synthetisiert und durch IR, UV, ESR sowie durch magnetische Suszeptibilitäts-Messungen bei variabler Temperatur charakterisiert. Die Röntgen-Kri-

Synthesis, Crystal Structure and Magnetic Properties of Heterodimetallic ReIVCuII Complexes

“…The [ReCl 4 ox] 2– anion with a chelating oxalato ligand shows no unusual structural features with respect to bond lengths or angles (Table 2). 9,10 A simplified view of the packing of the ions in the elementary cell is illustrated in Figure 5. The [(CuL α ) 2 Cl] 3+ cations are arranged in layers parallel to ab in c = 0 and 1 / 2 , the anions [ReCl 4 ox] 2– and Cl – in c = 1 / 4 and 3 / 4 , respectively.…”

A new Schiff base copper (II) complex: bis[N-(4-hydroxysalicylidene)-N′,N′-diethylethylenediamine-κ2N,O]bis[(oxalato-κ2O,O′)copper(II)] dihydrate

“…In order to emulate the biological activity of metalloproteins, particularly their active sites, various model metal complexes containing Schiff base ligands have been synthesized and studied for their dioxygen uptake (McLendon & Martell, 1976;Niederhoffer et al, 1984;Smith & Pilbrow, 1981;Tovrog et al, 1976;Martell & Sawyer, 1988;Busch & Alcock, 1994) and oxidative catalysis (Holm, 1987;Srinivasan et al, 1986;Dixit & Srinivasan, 1988;Rihter et al, 1993;SriHari & Masnovi, 1990). Recently, our group has studied the synthesis and the magnetic properties of Schiff base complexes (Bian, Gu et al, 2003;Bian, Xu et al, 2003a,b;Bian et al, 2004). We report here a new five-coordinate copper(II) complex with a tridentate Schiff base ligand, which is condensed from N,N-diethylethylenediamine and 2,4dihydroxybenzaldehyde.…”

A new Schiff base–copper(II) complex: [N-(2-hydroxyethyl)-N′-(2-oxidobenzylidene)ethylenediamine-1κ4O,N,N′,O′][μ-N-(2-oxidobenzylidene)-N′-(2-oxidoethyl)ethylenediamine-1κO:2κ4O,N,N′,O′]dicopper(II) perchlorate methanol solvate

“…In order to emulate the biological activity of metalloproteins, particularly their active sites, various model metal complexes containing Schiff base ligands have been synthesized and studied for their dioxygen uptake (McLendon & Martell, 1976;Niederhoffer et al, 1984;Smith & Pilbrow, 1981;Tovrog et al, 1976;Martell & Sawyer, 1988;Busch & Alcock, 1994) and oxidative catalysis (Holm, 1987;Srinivasan et al, 1986;Dixit & Srinivasan, 1988;Rihter et al, 1993;Srihari & Masnovi, 1990). Recently, our group has studied the synthesis and the magnetic properties of Schiff base complexes (Bian, Gu et al, 2003;Bian, Xu et al, 2003a,b;Bian et al, 2004). We report here a new copper(II) complex with a tetradentate Schiff base ligand, which is condensed from salicylaldehyde and N-(2hydroxyethyl)ethylenediamine.…”