A direct route to obtain manganese(III) complexes with a new class of asymmetrical Schiff base ligands

Citation
Mr. Bermejo et al., A direct route to obtain manganese(III) complexes with a new class of asymmetrical Schiff base ligands, NEW J CHEM, 24(4), 2000, pp. 235-241
Citations number
52
Categorie Soggetti
Chemistry
Journal title
NEW JOURNAL OF CHEMISTRY
ISSN journal
11440546 → ACNP
Volume
24
Issue
4
Year of publication
2000
Pages
235 - 241
Database
ISI
SICI code
1144-0546(200004)24:4<235:ADRTOM>2.0.ZU;2-L
Abstract
A new class of asymmetrically substituted Schiff base ligands has been synt hesised incorporating hard amido donor atoms. The single crystal X-ray stru cture of one of these ligands, H-3-amsal, has been determined [H-3-amsal = 3-aza-4-(2-hydroxyphenyl)-N-(2-hydroxyphenyl)but-3-enamide]. The structure reveals the ligand to be suitable for use as an equatorially co-ordinating ligand in octahedral complexes. A new route to obtaining manganese(III) com plexes of these ligands, with high yield and purity, has been designed. Com plexes of the form Mn-III(amsal-R) (H2O)(n) (n = 1-4) have been prepared by the electrochemical oxidation of a manganese anode in an acetonitrile solu tion of the ligands. The compounds have been characterised by elemental ana lyses, IR and H-1 NMR spectroscopies, FAB mass spectrometry, magnetic measu rements, Lambda(M) and cyclic voltammetry.