Synthesis, X-ray crystal structure, and electrochemistry of polynuclear azido-bridged manganese(III) and copper(II) Schiff base complexes - 07/11/13
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Graphical abstract |
A new one-dimensional azido bridged manganese(III) polymer, [Mn(salabza)(μ-1,3-N3)]n (1), and a centrosymmetric tetranuclear azido bridged copper(II) complex [Cu4(salabza)2(μ-1,1-N3)2(N3)2(HOCH3)2] (2) have been synthesized and characterized, and the X-ray crystal structures of (1) and (2) have been determined. Spectral and electrochemical studies are also reported.
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New azido-bridged [MnIII(salabza)(μ-1,3-N3)]n (1), and [CuII4(salabza)2(μ-1,1-N3)2(N3)2(HOCH3)2],(2) complexes with an unsymmetrical Schiff base ligand, {H2salabza=N,N’-bis(salicylidene)-2-aminobenzylamine}, have been synthesized, characterized by spectroscopic and electrochemical methods, and their crystal structures have been determined by X-ray diffraction. In complex 1, each manganese(III) atom is coordinated with N2O2 donor atoms from salabza and two adjacent Mn(III) centers are linked by an end-to-end (EE) azide bridge to form a helical polymeric chain with octahedral geometry around the Mn(III) centers. Complex 2 is a centrosymmetric tetranuclear compound containing two types of Cu(II) centers with square pyramidal geometry. Each terminal copper atom is surrounded by N2O2 atoms of a salabza ligand, and the oxygen atom of the methanol molecule. Each central copper(II) ion is coordinated with two phenoxo oxygen atoms from one salabza, one terminal azido, and two end-on (EO) bridging azido ligands. The central copper(II) ions are linked to each other by the two end-on (EO) azido groups.
Le texte complet de cet article est disponible en PDF.Keywords : Unsymmetrical Schiff base, Polynuclear Mn(III) complex, Tetranuclear Cu(II) complex, Azido-bridged, Crystal structure, Cyclic voltammetry
Plan
Vol 16 - N° 12
P. 1091-1097 - décembre 2013 Retour au numéro
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