Synthesis and structural studies on trivalent lanthanide 2-acetylpyridine-2-furoylhydrazone complexes |
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Authors: | Bachcha Singh Pramod K Singh |
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Institution: | (1) Department of Chemistry, Banaras Hindu University, 221005 Varanasi, India |
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Abstract: | Summary Two types of M(Hapfh)2Cl]Cl2 and M(apfh)2OH] complexes; Hapfh=2-acetylpyridine-2-furoylhydrazone M=LaIII, PrIII, NdIII, EuIII or DyIII], possessing the neutral and deprotonated ligand respectively, have been prepared and characterised by elemental analysis, molar conductance, magnetic susceptibility measurements, electronic, i.r. and n.m.r. (1H and13C) spectral studies. The nephelauxetic ratio (
), covalency ( ) and bonding parameter (b1/2) have been calculated for the NdIII complexes. I.r. spectral studies reveal that Hapfh acts as a neutral tridentate in M(Hapfh)2Cl]Cl2 and uninegative tridentate in M(apfh)2OH]. A coordination number of seven around the metal ions is proposed. |
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