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Synthesis and Study of some Crown Ether Complexes of Ba(II) Ion by IR and 1H-NMR Analysis


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1 PG Department of Chemistry, Ranchi College, Ranchi-834008
     

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The affinity of crown ether for an alkali and alkaline earth metal ion is dependent on the size of the ring of the crown ether with some exceptions. The crown ether-metal ion binding is enhanced in the absence of non-coplanar donor oxygen atoms and electron withdrawing substituents in the crown ether skeleton. The study of absorption of radio frequency radiation by a magnetic nucleus (I¹0), in the presence of applied magnetic field provides useful information regarding structure of a number of organic and inorganic compounds. The present paper describes preparation and characterization of some Ba(II) complexes with 1,4,7,10,13,-pentaoxacyclopentadecane (15C5), 1,4,7,10,13,16,- hexaoxacyclooctadecane (18C6) and 2,3,11,12-dibenzo-1,4,7,10,13,16,-hexaoxacyclooctadeca-2,11-diene (dibenzo18C6), having five and six donar oxygen atoms respectively. Small but noticeable changes were observed in the chemical shift of 1-H in 15C5, 18C6 and, 1-H as well as 2-H, in dibenzo18C6, which moved downfield upon complexation with barium ion. The metal salts used for complexation are salts of nitrophenols. Products were isolated from barium salts of all the three monoionic ligands, 2-nitrophenol (ONPH), 2,4-dinitrophenol (DNPH), 2,4,6- trinitrophenol (TNPH) and 8-hydroxyquinoline (8HQH). The bonding pattern and structure of complexes were suggested from the studies of elemental analysis, molar conductivity, IR, UV-Vis and 1H-NMR spectral analysis.

Keywords

15C5, 18C6, ONPH, DNPH, TNPH, TLC
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  • Horwitz EP, Dietz ML and Fisher DE. Solvant. Extr. Ion. Exch., 9, 1991, 1.
  • Bourson J, Pouger J and Valeur B. J. Phys. Chem., 39, 1993, 67.
  • Czarnik AW. Fluorescent Chemosensors For Ion and Molecule Recognition, Ch-9, Pg 130- 146, ACS. Symp. Ser., 538, 1993.
  • Kozak RW, Waldmann TA, Atcher RW and Gansow OA. Trends Biotech., 4, 1985, 259.
  • Pedersen CJ. J. Am. Chem. Soc., 89, 1967, 7017.
  • Pedersen CJ. J. Am. Chem. Soc., 92, 1970, 386.
  • Beer PD. J. Chem. Soc., Chem. Commun., 689, 1996, 696.
  • Fabbrizzi L and Pogg A. Chem. Soc. Rev., 24, 1995, 174.
  • Wang K and Gokel GW. Pure and Appl. Chem., 68 (6), 1996, 1267.
  • Beer PD and Cadman J. Coord. Chem. Rev., 205, 2000, 131.
  • Geary WJ. Coord. Chem. Rev., 7, 1971, 81.
  • Bailer JCJr. and Sharma BD. J. Am. Chem. Soc., 77, 1955, 5476.
  • Bruno MH, Hurtado P, Hortal AR, Steill JD, Oemens J and Markling PJ. J. Phys. Chem. A, 113, 2009, 7748.
  • Condrate RA and Nakamoto K. J. Chem. Phys., 42, 1965, 2590.
  • Lu T, Gan X, Tang N and Tan M. Polyhedron, 9, 1990, 2371,
  • Nakamoto K. Infrared and Raman Spectra of Inorganic and Coordination Compounds, 3rd ed, John Wiley, New York. 1978
  • Olszanski DJ and Melson GA. Inorg. Chim. Acta., 26, 1978, 263.
  • Wilson MJ, Pethrick RA, Pugh D and Islam MS. J. Chem. Soc, Faraday Trans., 93, 11, 1997, 2097.
  • Fulmer GR, Miller JMA and Sherden NH. Organometallics, 29, 2010, 2176.
  • Wilson MJ, Pethrick RA, Pugh D and Islam MS. J. Chem. Soc, Faraday Trans., 93, 1997, 387.
  • Mojtaba S and Mohsen I. J. Solution. Chem., 37, 2008, 657.

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  • Synthesis and Study of some Crown Ether Complexes of Ba(II) Ion by IR and 1H-NMR Analysis

Abstract Views: 72  |  PDF Views: 2

Authors

Rajeev Ranjan
PG Department of Chemistry, Ranchi College, Ranchi-834008

Abstract


The affinity of crown ether for an alkali and alkaline earth metal ion is dependent on the size of the ring of the crown ether with some exceptions. The crown ether-metal ion binding is enhanced in the absence of non-coplanar donor oxygen atoms and electron withdrawing substituents in the crown ether skeleton. The study of absorption of radio frequency radiation by a magnetic nucleus (I¹0), in the presence of applied magnetic field provides useful information regarding structure of a number of organic and inorganic compounds. The present paper describes preparation and characterization of some Ba(II) complexes with 1,4,7,10,13,-pentaoxacyclopentadecane (15C5), 1,4,7,10,13,16,- hexaoxacyclooctadecane (18C6) and 2,3,11,12-dibenzo-1,4,7,10,13,16,-hexaoxacyclooctadeca-2,11-diene (dibenzo18C6), having five and six donar oxygen atoms respectively. Small but noticeable changes were observed in the chemical shift of 1-H in 15C5, 18C6 and, 1-H as well as 2-H, in dibenzo18C6, which moved downfield upon complexation with barium ion. The metal salts used for complexation are salts of nitrophenols. Products were isolated from barium salts of all the three monoionic ligands, 2-nitrophenol (ONPH), 2,4-dinitrophenol (DNPH), 2,4,6- trinitrophenol (TNPH) and 8-hydroxyquinoline (8HQH). The bonding pattern and structure of complexes were suggested from the studies of elemental analysis, molar conductivity, IR, UV-Vis and 1H-NMR spectral analysis.

Keywords


15C5, 18C6, ONPH, DNPH, TNPH, TLC

References