A mononuclear copper(II) complex of an unsymmetrical dinucleating ligand
摘要:
The unsymmetrical and potentially dinucleating ligand 4-bromo-2-(2-hydroxyethyliminomethyl)-6-(morpholin-4-ylmethyl)phenol (H(2)L(1)) has been prepared via a Mannich reaction under non-aqueous aprotic conditions. Reaction with copper(II) yielded mono- and di-nuclear complexes; the crystal structure of the mononuclear complex [Cu(H(2)L(1))][ClO4](2) . H2O . MeOH has been determined.
Synthesis of unsymmetrical dinucleating ligands bearing nitrogen and oxygen donor atoms
作者:David E. Fenton、George Papageorgiou
DOI:10.1016/0040-4020(96)00222-0
日期:1996.4
The synthesis of unsymmetrical dinucleating ligands bearingnitrogen and oxygen donor atoms is described. The Schiff-base condensation of functionalised salicylaldehyde derivatives with primary amines gave rise to unsymmetrical unsaturated ligands, whereas condensation with secondary amines followed by in situ reduction of the iminium species with sodium borohydride, led to the formation of unsymmetrical
Synthesis of Transition Metal Complexes with Aza-Crown Substituted Unsymmetrical Salicylaldimine Bis-Schiff Base Ligands and Metal Schiff Base Complex Catalysed Oxidation of P-Xylene to P-Toluic Acid
Four unsymmetrical, salicylaldimine bis-Schiff bases with pendant benzo-10-aza-15-crown-5- or morpholino-groups and their 1:1 (ligand /metal) complexes with cobalt, copper and manganese have been synthesised and studied as catalysts in the aerobic oxidation of p-xylene to p-toluic acid. Significant selectivity (up to −90%) and conversion levels (up to −70%) were obtained. The effects of the pendant