名称:
Synthesis, Characterization, and Electrical Conductivities of Some Transition Metal Complexes of N‐Nicotinoyl‐N′‐p‐hydroxythiobenzhydrazine
摘要:
The complexes [m(L)](n), [M = VO(IV), Cu(II), Zn(II), Cd(II), Hg(II)] and [Fe(L)(acac)](n) with N-nicotinoyl-N'-p-hydroxythiobenzhydrazine (H2L) have been prepared and characterized by elemental analyses, magnetic susceptibility measurements, electronic, NMR (H-1 and C-13), IR and FAB mass spectral data. The physico-chemical studies indicate that the complexes are polymeric in nature. A square-pyramidal Structure for [VO(L)](n), an octahedral structure for [Fe(L)(acac)](n) and a square-planar structure for [Cu(L)], have been proposed. The Mossbauer spectra of [Fe(L)(acac)], at room temperature and at 78 K suggest the presence of high-spin (S = 5/2) octahedral Fe(III). The complexes of VO(IV), Fe(III) and Hg(II) show semiconducting behavoiour in the solid state in the temperature range 307-397 K, with a band gap of 0.44-1.32 eV. The other complexes are insulators.