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Synthesis, physical studies and crystal structure determination of Y(III) and Er(III) complexes of 1-(pyridin-2-yl)-2-(pyridine-2-ylmethylene)hydrazine

Two isotype mononuclear yttrium(III) and erbium(III) complexes, {[Y(HL)(OAc)2(H2O)2]. (H2O)?(NO3)} (1) and {[Er(HL) (OAc)2(H2O)2].(H2O)?(NO3)} (2), where HL is the neutral Schiff base ligand 1-(pyridin-2-yl)-2-(pyridine-2-ylmethylene)hydrazine, and OAc is the acetate anion, have been synthesized and characterized by physicochemical methods and single crystal X-ray determination. Both complexes crystallizes in the triclinic space group P? with unit cell dimensions for complex of Y(III) a = 7.909 (2) Å, b = 11.718 (4) Å, c = 12.497 (3) Å, ? = 78.907 (3)°, b = 73.840 (3)°, ? = 72.074 (3)°, V = 1051.26 (6) Å3, Z = 2, R1 = 0.051 and wR2 = 0.112 and for complex of Er(III)a = 7.913 (1) Å, b = 11.719 (2) Å, c = 12.487 (2) Å, ? = 78.832 (1)°, ? = 73.674 (1)°, ? = 72.012 (1)°, V = 1049.64 (3) Å3, Z = 2, R1 = 0.028, and wR2 = 0.062. In both complexes, the coordination polyhedra around Ln(III) atoms are best described as a distorted tricapped trigonal prism. Antioxidant activities of the ligand and its Y(III) and Er(III) complexes are studied.


Auteur(s) : Mbosse Ndiaye Gueye, Moussa Dieng, Djiby Lo, Ibrahima Elhadji Thiam, Aliou Hamady Barry, Mohamed Gaye, Abdou Salam Sall, Pascal Retailleau
Pages : 137-143
Année de publication : 2017
Revue : European Journal of Chemistry 2017, 8(2), 137-143. doi:10.5155/eurjchem.8.2.137-143.1557
N° de volume : 8
Type : Article
Mise en ligne par : GAYE Mohamed Lamine