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Showing papers by "Bachcha Singh published in 1989"


Journal ArticleDOI
TL;DR: In this paper, photoacoustic spectra of powder NiII complexes have been recorded and interpreted in the light of u.v.r. and n.m.s. spectra.
Abstract: 2-Aminoacetophenone-2-thenoylhydrazone, Haath, C4H3SC(O)NHN=C(Me)C6H4NH2-o, forms complexes with metal(II) salts of empirical compositions [VO(Haath)2SO4], [M(Haath)2Cl2] [M=CoII, NiII, CuII or ZnII] and [M(aath)2] [M=VIVO, CoII, NiII, CuII or ZnII] which have been characterized by elemental analyses, molar conductance, magnetic susceptibility, electronic, e.s.r., i.r. and n.m.r. (1H and13C) spectral studies. X-ray and electron diffraction patterns have been obtained in order to elucidate the structure of the CuII complexes. Photoacoustic spectra of powder NiII complexes have been recorded and interpreted in the light of u.v./vis. spectra.

9 citations


Journal ArticleDOI
TL;DR: Two types of [M(Hapfh)2Cl]Cl2 and [m(apfs)2OH] complexes, 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. (1H and 13C) spectral studies as mentioned in this paper.
Abstract: 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 (\(\bar \beta \)), covalency (δ) 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.

6 citations


Journal ArticleDOI
TL;DR: In this paper, the nephelauxetic ratio (β), covalency (δ), and bonding parameter (b1/2) have been calculated for Pr(III), Nd(III) and Sm(III).
Abstract: o-Hydroxyacetophenone-2-furoylhydrazone (H2hafh) C13H12O3N2 forms the complexes of the type K[Ln(hafh)2H2O] [Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III) and Dy(III)]. The complexes have been characterised by elemental analyses, molar conductance, magnetic susceptibility, infrared, electronic and proton n.m.r. spectral studies. The nephelauxetic ratio (β), covalency (δ) and bonding parameter (b1/2) have been calculated for Pr(III), Nd(III) and Sm(III) complexes. I.r. and n.m.r. spectral studies suggest that H2hafh behaves as dinegative tridentate ligand with the bonding sites being azomethine nitrogen, phenolate and enolate oxygens. A coordination number seven has been proposed around the metal ions in all the complexes.

1 citations