The (salophen)-bridged Fe/Cr (III) capped complexes with triphenylene core: Synthesis and characterization

This article describes synthesis of the difference carboxylic acid derivatives of triphenylene and its complexation properties with Fe/Cr (III)–salophen. For this purpose, the carboxylic acid derivatives of 2,3,6,7,10,11-hexahydroxytriphenylene were synthesized and then reacted with four new Fe(III) and Cr(III) complexes involving tetradenta Schiff bases bis(salicylidene)-o-phenylenediamine-(salophenH2). The prepared compounds were characterized by means of elemental analysis carrying out infrared spectroscopy (IR), thermogravimetric analysis (TG), nuclear magnetic resonance (1H NMR), elemental analysis and magnetic susceptibility measurement. The complexes can also be characterized as low-spin distorted octahedral Fe(III) and Cr (III) bridged by carboxylic acids.

Six new hexanuclear Fe/Cr(III) complexes involving tetradentate Schiff bases N,N′-bis (salicylidene)-o-phenylenediamine (salophenH2) with triphenylene moiety containing carboxylic acid groups were prepared and their physical, thermal, magnetic properties were investigated.Figure optionsDownload as PowerPoint slideHighlights
► Several novel Fe/Cr (III) salophen complexes containing a triphenylene unit have been synthesized.
► These complexes are the examples of hexanuclear complexes bridged by carboxyl to the Fe/Cr(III) centers.
► The magnetic data for the complexes show well agreement with the d3 and d5 metal ion in an octahedral structure.
► All of the complexes were characterized by means of magnetic susceptibility and other techniques.