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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 Gueye, Mbosse Ndiaye Dieng, Moussa Lo, Djiby Thiam, Ibrahima Elhadji Barry, Aliou Hamady Gaye, Mohamed Sall, Abdou Salam Retailleau, Pascal Complex Schiff base Crystal structure NMR spectroscopy Antioxidant activity Magnetic properties 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 Pī with unit cell dimensions for complex of Y(III) a = 7.909 (2) Å, b = 11.718 (4) Å, c = 12.497 (3) Å,    α = 78.907 (3)°, b = 73.840 (3)°, γ = 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,          α = 78.832 (1)°, α = 73.674 (1)°, γ = 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. Atlanta Publishing House LLC 2017-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/plain text/plain https://www.eurjchem.com/index.php/eurjchem/article/view/1557 10.5155/eurjchem.8.2.137-143.1557 European Journal of Chemistry; Vol. 8 No. 2 (2017): June 2017; 137-143 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/1557/pdf_1557 https://www.eurjchem.com/index.php/eurjchem/article/view/1557/2594 https://www.eurjchem.com/index.php/eurjchem/article/view/1557/2595