Add time:08/09/2019         Source:sciencedirect.com

The X-ray structure of a new PrCl3(BrCH3OC7H7NO)3 compound has been determined and described in monoclinic space group P21/n with four molecules per unit cell of dimensions: a=8.232, b=23.733, c=16.763 Å and β=90.75°. The Pr3+ ion is six-coordinated with three Cl ions and three oxygen ions of the N-oxide group of the 3-bromo-4-methoxy-2,6-lutidine moieties. The molecules are linked through hydrogen bonds of the type C–H⋯Cl and length 3.591 Å. The chloro and iodo derivatives of the lutidine N-oxide have also been synthesized and their properties are compared to those of the bromo complex. The FTIR and FT Raman spectra as well as electron absorption and emission spectra have been recorded and analyzed in terms of site symmetry and energy level scheme of praseodymium(III) ion. In addition, the europium analogue was used as a model system to study the ligand to metal energy transfer.

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