three-dimensional samarium(iii) coordination polymer with 1,2,4,5-benzenetetracarboxylicylate ligand and ethylenediammonium cation: synthesis, infrared spectroscopy characterization, thermal analyses, and crystal structure

چکیده مقاله

a new three-dimensional samarium(iii) coordination polymer, {[sm(μ2-btec)(h2o)4](h2en)0.5.2h2o}n (1) (btec4- is 1,2,4,5-benzenetetracarboxylicylate and h2en2+ is ethylenediammonium), was prepared from the reaction of smcl3.6h2o and [h2en]2[bct].2h2o in water and in an ice bath. suitable crystals of this complex for crystal structure determination were obtained by slow evaporation of the produced colorless solution at room temperature. complex 1 was characterized by elemental analysis, ft-ir spectroscopy and single-crystal x-ray crystallography. the x-ray crystallography analysis shows that this compound is a three-dimensional polymer and the sm(iii) cation is nine-coordinated in a distorted tri-capped trigonal prismatic configuration by nine o atoms from four btec anions and four coordinated water molecules. also, the thermal stability of 1 was studied by thermogravimetric and differential thermal analyses.