Synthesis and spectroscopy studies of new neodymium(III) complexes with cyanamide derivatives as N-Donor ligand

Four new complexes [Nd(phen)2(pcyd)3] (1), [Nd(phen)2(2-Clpcyd)3] (2), [Nd(phen)2(2,3,5-Cl3pcyd)3] (3) and [Nd(phen)2(2,3,4,5-Cl4pcyd)3] (4) where pcyd = phenylcyanamide anion, 2-Clpcyd = (2-chlorophenyl)cyanamide anion, 2,3,5- Cl3pcyd = (2,3,5-threechlorophenyl)cyanamide anion and 2,3,4,5-Cl4pcyd = (2,3,4,5-tetrachlorophenyl)cyanamide anion, were prepared and characterized by IR, UV-Vis and 1H NMR spectroscopy as well as elemental analysis. The 1H NMR spectra of these complexes show broadening of ligand protons attributed to coordination of paramagnetic center.