X-ray structure and spectroscopic properties of some lanthanides(III) complexes derived from 2,6-diacetylpyridine-bis(benzoylhydrazone) |
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| Affiliation: | 1. Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Senegal;2. Département de Chimie, Faculté des Sciences, Université de Nouakchott, Nouakchott, Mauritania;3. Faculté des Sciences de Tunis, 1060 Campus Universitaire, Tunis, Tunisia;1. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;1. G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 603950 Nizhnii Novgorod, Russian Federation;2. Institut Charles Gerhardt Montpellier (ICGM), UMR-5253 CNRS-UM-ENSCM, Ingenierie Moleculaire et Nano-Objets, Universite de Montpellier, 34095 Montpellier Cedex 5, France;3. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russian Federation;1. Department of Chemistry, Chifeng College, Inner Mongolia 024000, PR China;2. Department of Chemistry, Hebei Normal University of Science & Technology, Qinhuangdao 066004, Hebei Province, PR China;3. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, PR China |
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| Abstract: | A series of trivalent lanthanide complexes of type Ln(L) NO3)(S)n](NO3)m(S′)n, have been synthesized by the reaction of 2,6-diacetylpyridine-bis-(benzoylhydrazone) (H2L) with lanthanide(III) nitrates in ethanol. These complexes have been characterized by analysis, molar conductance, magnetic measurements, infrared spectral studies and X-ray diffraction. The analytical data revealed the formation of 1:1 (metal:ligand) stoichiometry. Molar conductance in dmf gives 2:1 electrolytes in all the complexes. Magnetic moment values are close proximity of the Van Vleck values. IR study suggests the coordination of the ligand through the azomethine and the oxygen of the hydrazonic moiety. The nitrate ion is also found to be bidentate in all the complexes. The crystal structures were determined. 6, C27H31N6O7S2Gd: a=b=8.6821(4) Å, c=84.363(5) Å, tetragonal P41212 and Z=8. bf 7, C25H25N6O6SDy: a=11.750(3) Å, b=13.250(3) Å, c=36.000(6) Å, β=98.50(2), monoclinic, C2/c, Z=8. 9, C24H25N6O7Yb: a=10.750(2) Å, b=17.750(3) Å, c=14.250(4) Å, β=99.00(2), monoclinic, P21/n, Z=4. In these complexes the lanthanide ion assumes a nine coordinated geometry for Gd and an eight coordinated geometry for Dy and Yb. |
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