SINTEZA ȘI CARACTERIZAREA CARBOXILAȚILOR HEPTANUCLEARI AI FIERULUI(III) PE BAZĂ DE DERIVAȚI AI DIETANOLAMINEI

Abstract

This study focuses on the synthesis and characterization of heptanuclear iron(III) compo unds featuring polyalcoholamine ligands. Ultrasonic treatment of small trinuclear or hexanucle ar pivalate clusters and diethanolamine derivatives (R-deaH2 , R = CH3 (1); CH3 C6 H4 (2)) resul ted in two heptanuclear iron(III) clusters with general formula [Fe7 O2 (piv)9 (R-dea)3 (H2 O)3 ]. A single-crystal X-ray diffraction analysis shows that clusters 1 and 2 have a disk-like {Fe7 O3 } core in which the central FeIII atom linked to FeIII 6 hexagon by three µ3 -O2− groups. Six pivalates and three polyalcoholamine ligands additionally bridge all FeIII atoms. The remaining pivalates and three water molecules completed the coordination sphere of metal atoms. In summary, this study showcases the synthesis and characterization of heptanuclear iron(III) compounds with amine alcohol ligands, offering a deeper understanding of their structural properties, with promising implications for the field of coordination chemistry and advanced materials science.