KARMAKAR, Ruma; ROY CHOUDHURY, Chirantan; HUGHES, David L.; YAP, Glenn P. A.; EL FALLAH, M. Salah; DESPLANCHES, Cédric; SUTTER, Jean-Pascal; MITRA, Samiran

doi:10.1016/j.ica.2005.09.013

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KARMAKAR, Ruma
Department of Chemistry

ROY CHOUDHURY, Chirantan
Department of Chemistry

HUGHES, David L.
School of Chemical Sciences and Pharmacy

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Inorganica Chimica Acta. 2006, vol. 359, n° 4, p. 1184-1192

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The synthesis, crystal structures and magnetic properties of two different copper(II) complexes of formula [Cu(L1)(dca)]n · nClO4 (1) and [Cu(L2)]2(dca)(ClO4) (2) [L1 = N,N-dimethylethylene-N′-(pyridine-2-carbaldiiminato), HL2 = N,N-dimethylethylene-N′-salicylaldiiminato, dca = dicyanamide anion] are described. Spectroscopic and electrochemical properties have also been discussed. A one-dimensional chain structure with single, symmetrical, μ1,5-dca bridges is found in compound 1. The copper atom in 1 has a square pyramidal geometry. A tridentate Schiff base ligand, having NNN donor sites, and one nitrogen atom from dca occupy the basal plane. N(18) of a neighbouring unit occupies the apical site. The Schiff base used in compound 2 is a tridentate anion with NNO donor sites, which changes the structure in a dinuclear unit of copper atoms bridged by single end-to-end dicyanamide ion. The environment around copper in 2 is square planar. Magnetic susceptibility measurements for 1 and 2 reveal the occurrence of weak antiferromagnetic interaction through the dca ligand.< Réduire

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Dicyanamide

Copper(II)

Schiff base

Polymer

Dimer

Crystal structure

Magnetic properties

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Two new end-to-end single dicyanamide bridged Cu(II) complexes with schiff base ligands: structural, electrochemical and magnetic properties

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