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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Tyagi, Monika Rani, Soni Kumar, Sumit Chandra, Sulekh |
| Description | Country affiliation: India Author Affiliation: Chandra S ( Department of Chemistry, Zakir Husain College, University of Delhi, JL Nehru Marg, New Delhi 110002, India. schandra_00@yahoo.com) |
| Abstract | The lanthanide complexes derived from (3,5,13,15-tetramethyl 2,6,12,16,21-22-hexaazatricyclo[15.3.I(1-17)I(7-11)]cosa-1(21),2,5,7,9,11(22),12,15,17,19-decane) were synthesized. The complexes were found to have general composition [Ln(L)X(2).H(2)O]X, where Ln=La(3+), Ce(3+), Nd(3+), Sm(3+) and Eu(3+) and X=NO(3)(-) and Cl(-). The ligand was characterized by elemental analyses, IR, Mass, and (1)H NMR spectral studies. All the complexes were characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, IR, Mass, electronic spectral techniques and thermal studies. The ligand acts as a hexadentate and coordinates through four nitrogen atoms of azomethine groups and two nitrogen of pyridine ring. The lanthanum complexes are diamagnetic while the other Ln(III) complexes are paramagnetic. The spectral parameters i.e. nephelauxetic ratio (beta), covalency factor (b(1/2)), Sinha parameter (delta%) and covalency angular overlap parameter (eta) have been calculated from absorption spectra of Nd(III) and Sm(III) complexes. These parameters suggest the metal-ligand covalent bonding. In the present study, the complexes were found to have coordination number nine. |
| ISSN | 13861425 |
| Issue Number | 2 |
| Volume Number | 75 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-02-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Lanthanoid Series Elements Chemistry Chemical Synthesis Macrocyclic Compounds Metabolism Ligands Magnetic Resonance Spectroscopy Metals, Heavy Models, Chemical Models, Molecular Molecular Structure Spectrometry, Mass, Electrospray Ionization Spectrophotometry, Infrared Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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