Synthesis, magneto-spectral and thermal characteristics of some 7-coordinated compounds of lanthanides (III) chlorides with 4[(furan-2-ylmethylene)amino]-1,5-dimethyl-2-phenyl pyrazol-3-one and isonicotinic acid (3',4',5'-trimethoxybenzylidene) hydrazide

Abstract

In the present work, we describe the isolation of some lanthanide(III) chlorides coordination com-pounds with 4[(furan-2-ylmethylene)amino]-1,5-dimethyl-2-phenyl pyrazol-3-one (FDPPO) and isonico-tinic acid(3',4',5'-trimethoxybenzylidene)hydrazide (ITMBH) with the general composition $[Ln(L)_2Cl_3]$ (Ln = La, Pr, Nd, Sm, Gd, Tb, Dy or Ho; L = FDPPO or ITMBH). All the isolated compounds were characterized through various physico-chemical studies. The coordinating ligands FDPPO or ITMBH act as neutral bidentate N and O-donors in the present compounds. The central metal ion displays the coordination number 7 in these complexes. Thermal stabilities of these complexes were also studied through thermogravimetric analysis.