Novel ligation of some rare earth metal supramolecular polymer complexes

Role of a Novel Mixed-Valence-Ligand on the Structures of Supramolecular Polymeric Complexes

“…The infrared spectrum of the monomer shows the presence of a -NH absorption band in the 2975-3335 cm −1 region and the 1 H-NMR spectrum of the monomer shows characteristic bands at δ = 10.4 − 10.7 ppm due to NH groups [6].…”

“…The polymer complex was filtered, washed with water and dried in vacuum oven at 40 • C for several days. (6) (Fig. 1, B) A hot solution of RhCl 3 · xH 2 O (0.25 g, 1 mmol) in DMF (10 ml) was added to a filtered solution of AETH (0.32 g, 2 mmol) in DMF (25 ml).…”

“…N -Acrylamido-1-ethyl-2-thiourea monomer (AETH) was prepared according to the procedures described by Mubarak and co-workers [5][6][7][8] and El-Sonbati et al [11]. The infrared spectrum of the monomer shows the presence of a -NH absorption band in the 2975-3335 cm −1 region and the 1 H-NMR spectrum of the monomer shows characteristic bands at δ = 10.4 − 10.7 ppm due to NH groups [6].…”

“…The recorded IR spectrum of the homo-polymer and assignments of char-acteristic bands are based on published data [3][4][5][6][7].…”

“…Recently, we reported the interaction of monomer with Rh(III) and Ru(III) ions in the presence and absence of various N -heterocyclic bases [3,4]. To our knowledge, this is the * E-mail: atmubarak@kku.edu.sa The complexing behaviours of biologically active ligands containing thioamide and/or acid amide groups have been the subject of investigations in our laboratory [3][4][5][6][7][8]. The effects of various ligands and metal ions on metal-ligand covalency, d-orbital splitting and distortion of complexes have been subjects of considerable interests in the field of coordination chemistry.…”