Syntheses, structures and properties of copper(II) complexes containing N-(2-hydroxybenzyl)-amino amide ligands
摘要:
Four copper(II) complexes containing the reduced Schiff base ligands, namely, N-(2-hydroxybenzyl)-glycinamide (Hsglym) and N-(2-hydroxybenzyl)-L-alaninamide (Hsalam) have been synthesized and characterized. The crystal structures of [Cu-2(sglym)(2)Cl-2] (1), [Cu-2(salam)(2)(NO3)(2)]center dot H2O(3), [Cu-2(salam)(2)(NO3)(H2O)](NO3)center dot 1.5H(2)O (4), [Cu-2(salam)(2)](ClO4)(2)center dot 2H(2)O (5) show that the Cu(II) atoms are bridged by two phenolato oxygen atoms in the dimers. The sglym ligand bonded to Cu(II) in facial manner while salam ligand prefers to bind to Cu(II) in meridonal geometry. Variable temperature magnetic studies of 3 showed it is antiferromagnetic. These Cu(II) complexes and [Cu-2(sglym)(2)(NO3)(2)](2), exhibit very small catecholase activity as compared to the corresponding complexes containing acid functional groups. (c) 2006 Elsevier B.V. All rights reserved.
[EN] COMPOUNDS DERIVED FROM 1 -ETHYL-4,5-DIAMINO-PYRAZOLE AND THEIR USE FOR OXIDATIVE DYEING OF KERATIN FIBRES<br/>[FR] COMPOSÉS DÉRIVÉS DE 1 -ÉTHYL-4,5-DIAMINO-PYRAZOLE ET LEUR UTILISATION DANS LA TEINTURE OXYDANTE DE FIBRES KÉRATINIQUES
申请人:KEMON S P A
公开号:WO2008047210A2
公开(公告)日:2008-04-24
[EN] The invention concerns new compounds derived from 1-ethyl-4,5-diamino- pyrazole of formula (I) as dye precursors to be used in compositions with coupling agents for oxidative dyeing of keratin fibres, preferably hair. [FR] La présente invention concerne de nouveaux composés dérivés de 1-éthyl-4,5-diamino- pyrazole de formule (I) utiles comme précurseurs de colorant destinés à être utilisés dans des compositions avec des agents de couplage pour la teinture oxydante de fibres kératiniques, notamment les cheveux.