Daftar Isi: Nitrato-Complexes of Y(lll), La(lll), Ce(Ill), Pr(lll), Nd(lll), Sm(lll), Gd(IIl), Tb(IIl), Dy(lll) and Ho(Ill) with 2-(2'-Pyridyl)Benzimidazole

Daftar Isi:

Chemical Laboratory, Bbagalpur University, Bhagalpur-812 007 Manuscript received 29 July 1981, revised 23 November 1981, accepted 26 February 1982 The nitrato-complexes, [Y(PyBzH)2(NO8)2]NO8.H2O and [Ln(PyBzH)2 NO8.OH.H2O]NO8.nH2O.mC2H5OH[Ln=La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho; n=1-3, m=0-0.5 ; PyBzH=2-(2'-pyridyl)benzimidazole] are formed on interaction of the ligand with metal nitrates in ethanol. The electrical conductance values (116-129 ohm-1icm2mol-1) suggest 1 : 1 electrolyte-nature of the complexes. Magnetic moment values of Ce(2.53 B.M.), Pr(3.62 B.M.), Nd(3.52 B.M.), Sm(1.70 B.M.) Gd(8.06 B.M.), Tb(9.44 B.M.), Dy(10.56 B M.) and Ho(10.51 B.M.) in the complexes confirm the terpositive state of the metals. infrared evidences are obtained for the existence of both coordinated (C2V) and uncoordinated (D3H) nitrate groups. Electronic absorption spectra of Pr(III)-, Nd(III)-, Sm(III)-, Tb,III)-, Dy(III)- and Ho(III)complexes have been analysed in the light of LSJ terms.