The synthesis and magnetic and spectral studies of some lanthanide(III) chelates of 6-methyl pyridine-2-aldoxime |
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| Affiliation: | 1. Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea;2. Department of Polymer Engineering, College of Engineering, University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do, 18323, Republic of Korea;1. School of Tourism and Service Management, Nankai University, Tianjin, PR China;2. School of Business Administration, Zhongnan University of Economics and Law, 182# Nanhu Avenue, East Lake High-tech Development Zone, Wuhan, 430073, PR China;3. School of Tourism Management, Hubei University, Wuhan, 430062, PR China;4. William F. Harrah College of Hospitality, University of Nevada Las Vegas (UNLV), Las Vegas, USA;1. Centro de Ciências Exatas e da Tecnologia, Universidade de Caxias do Sul, 95070-560 Caxias do Sul, RS, Brazil;2. Institut des Sciences de la Terre d’Orléans, UMR 7327, CNRS-Université d’Orléans, 1A Rue de la Férollerie, 45071 Orléans Cedex 2, France;1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317–51167, I. R. Iran;2. Anesthesia Techniques Department, Al-Mustaqbal University College, Babylon, Iraq;3. Department of Medical Laboratory Technics, Al-Hadba University College, Iraq;4. Anesthesia techniques, Al-Nisour University College, Iraq;1. Civil Engineering Post Graduation Program, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil;2. Chemical Engineering Department, Federal University of Santa Maria, 97105-900 Santa Maria, Brazil;3. Department of Civil and Environmental, Universidad De La Costa, Calle 58 #55-66, 080002 Barranquilla, Atlántico, Colombia;4. Faculdade Meridional IMED, 304-Passo Fundo, RS 99070-220, Brazil |
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| Abstract: | A series of trivalent lanthanide chelates of the type [Ln(HMPOX)3(X)2](X) (where Ln3+ = La, Pr, Nd, Sm, Gd or Dy; HMPOX = 6-methylpyridine-2-aldoxime and X− = NO3 or Cl) have been synthesised by the direct reaction of 6-methylpyridine-2-aldoxime with lanthanide(III) nitrates or chlorides in 2,2′-dimethoxypropane and ethanol. These chelates have been characterized by analysis, molar conductance, X-ray powder diffraction patterns, magnetic, electronic and vibrational spectral studies. The analytical data reveal the presence of 1:3 (metal:ligand) stoichiometry and molar conductance data in ethanol indicate 1:1 electrolytes in all the lanthanide(III) chelates. The lanthanide(III) chelates with HMPOX are X-ray isomorphous. The magnetic moment values show little deviation from Van Vleck values. The electronic spectra, recorded at room temperature in methanol are dominated by ligand absorption bands and exhibit only slight shift and marked enhancement in the intensity of the bands. IR spectral data suggest the cis-coordination of the neutral HMPOX ligand molecules through pyridine nitrogen and oxime group nitrogen atoms and monodentate nitrate coordination to all lanthanide(III) chelates. |
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