Praseodymium (III) complexes with 1,10-phenanthroline and cyanamide derivatives as N-donor ligands

The molecular structure of praseodymium (III) complex with 1,10-phenanthroline (phen), [Pr(phen)2Cl3·OH2] (1) was determined by single-crystal X-ray diffraction. Crystal data: crystal system, triclinic, space group P  1¯ and Z = 2, a = 7.1110(7) Ǻ, b = 10.1716(10) Ǻ, c = 17.2367(18) Ǻ, α = 80.922(5)°, β = 78.759(5)°, γ = 70.151(5)°, R1 = 0.036; wR2 = 0.076 for all data. Treatment of aqueous solution of [Pr(phen)2Cl3·OH2] (1) with thallium phenylcyanamide salts yield [Pr(phen)2(L)3] (L = pcyd (2), 2-Clpcyd (3), 2,3,5-Cl3pcyd (4), 2,3,4,5-Cl4pcyd (5)). Four new praseodymium (III) complexes have been 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.

Graphical abstractThe molecular structure of [Pr(phen)2Cl3·OH2] (1) (where phen is 1,10-phenanthroline), was determined by single-crystal X-ray diffraction. Treatment of aqueous solution of [Pr(phen)2Cl3OH2] with thallium phenylcyanamide salts yield [Pr(phen)2(L)3] (L = pcyd (2), 2-Clpcyd (3), 2,3,5-Cl3pcyd (4), 2,3,4,5-Cl4pcyd (5)).Figure optionsDownload full-size imageDownload as PowerPoint slide