SYNTHETIC AND SPECTROSCOPIC STUDIES OF COBALT (II), NICKEL (II), COPPER (II) AND ZINC (II) COMPLEXES OF PYRIDINE-2-CARBOXALDEHYDE THIOBENZOYL HYDRAZONE
Nk. Singh et Nr. Agrawal, SYNTHETIC AND SPECTROSCOPIC STUDIES OF COBALT (II), NICKEL (II), COPPER (II) AND ZINC (II) COMPLEXES OF PYRIDINE-2-CARBOXALDEHYDE THIOBENZOYL HYDRAZONE, Indian journal of chemistry. Sect. A: Inorganic, physical, theoretical & analytical, 37(3), 1998, pp. 276-279
Citations number
15
Categorie Soggetti
Chemistry
Journal title
Indian journal of chemistry. Sect. A: Inorganic, physical, theoretical & analytical
Pyridine-2-carboxaldehyde thiobenzoyl hydrazone (2-PTBH) forms 1:1 add
ucts with Cu(II) chloride and bromide and 1:2 adducts as well as depro
tonated complexes with Cu(II), Ni(II), Co(II) and Zn(II). Magnetic, el
ectronic and ESR spectral studies suggest high-spin octahedral geometr
y for all the Ni(II) and Co(II) complexes and distorted octahedral geo
metry for Cu(II) complexes. The literature survey reveals that no work
has been reported on the metal chelates of thiohydrazones derived fro
m pyridine-2 carboxaldehyde and thiocarboxyhydrazines except some work
published from our laboratory on 3d-metal complexes of pyridine-2, an
d 4-carboxaldehyde-2-furanthiocarboxyhydrazones(1). In view of this, t
he synthesis and characterization of Co(II), Ni(II), Cu(II) and Zn(I)
complexes of the title ligand (2-PTBH, I) have been undertaken and the
results of these investigations are described in the present note.