Synthesis and Characterization of Dendrimeric Bridged Salen/Saloph Complexes and Investigation of Their Magnetic and Thermal Behaviors

✍ Scribed by Ziya Erdem Koç; Şaban Uysal

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: German
• Weight: 264 KB
• Volume: 93
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200900294

✦ Synopsis

Abstract

Eight new multinuclear Fe^III^ and Cr^III^ complexes involving the tetradentate Schiff bases N,N′‐bis(salicylidene)ethylenediamine (salenH~2~) or N,N′‐bis(salicylidene)benzene‐1,2‐diamine (salophH~2~) and the two new ligands 4,4′,4″,4′′′,4′′′′,4′′′″‐[1,3,5‐triazine‐2,4,6‐triyltris(nitrilomethylidyne‐4,1‐phenyleneoxy‐1,3,5‐triazine‐6,2,4‐triyldiimino)]hexakis[benzoic acid] (4) or 5,5′,5″,5′′′,5′′′′,5′′′″‐[1,3,5‐triazine‐2,4,6‐triyltris(nitrilomethylidyne‐4,1‐phenyleneoxy‐1,3,5‐triazine‐6,2,4‐triyldiimino)]hexakis[benzene‐1,3‐dicarboxylic acid] (5) were synthesized (Schemes 1 and 2) and characterized by means of ^1^H‐NMR and FT‐IR spectroscopy, elemental analysis, LC/MS analysis, AAS (atomic‐absorption spectrum) analysis, thermal analyses, and magnetic‐susceptibility measurements. The complexes can also be characterized as low‐spin distorted‐octahedral Fe^III^ and Cr^III^ complexes bridged by carboxylato moieties.