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Salen and tetrahydrosalen nickel(II) and copper(II) complexes
Authors:Soto-Garrido  Gabriela  Salas-Reyes  Victor
Affiliation:(1) Faculty of Chemical Sciences, Casilla 3C, University of Concepción, Concepción, Chile
Abstract:The synthesis and characterisation of novel bis salen complexes, M(salenH2), N,Nprime-bis-[5(1,1,3,3-tetramethyl- butyl)salicylidene]-1,2-diaminoethane complexes, (Mthinsp=thinspNi or Cu), and the corresponding less studied, bis-tetrahydrosalen complexes, M[H2(salenH2)], N,Nprime-bis-[2-hydroxy-5(1,1,3,3-tetramethylbutyl)benzyl]-1,2-diaminoethane complexes, (Mthinsp=thinspNi or Cu), with a highly branched substitution pattern at C-5 of the benzene ring is described. The Schiff bases behave as dibasic tetradentate ligands. The tetrahydrosalen complexes show structural properties, chemical and thermal behaviour which is different from those of the corresponding salen complexes. The melting points and decomposition temperatures of these complexes were determined by d.s.c. and t.g.a.
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