Turkish Journal of Chemistry, Vol.28, No.4, 405-413, 2004
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
In the present work, we describe the isolation of some lanthanide(III) chlorides coordination compounds with 4 [(furan-2-ylmethylene) amino]-1,5-dimethyl-2-phenyl pyrazol-3-one (FDPPO) and isonicotinic acid (3' 4',5'-trimethoxybenzylidene) hydrazide (ITMBH) with the general composition [Ln(L)(2)Cl-3] (Ln = La, Pr, Nd, Sin, 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.
Keywords:lanthanide(III) complexes;4 [(furan-2-ylmethylene)amino]-1,5-dimethyl-2-phenyl pyrazol-3-one;isonicotinic acid (3 ',4 ',5 '-trimethoxybenzylidene) hydrazide;coordinItion number 7