Complexation of 3,4-Dialkyl Isoquinolones Semicarbazone and Thiosemicarbazone with Co(II), Ni(II) and Cu(II)

Abstract

A series of complexes of Co(II), Ni(II) and Cu(II) with 3-methyl-4-ethyl isoquinolone, semicarbazone and thiosemicarbazone [MEIQSC(HL¹) and MEIQTSC(HL²)] 3-methyl-4-propyl isoquinolone semicarbazone and thiosemicarbazone[MPIQSC(HL³) and MPIQTSC(HL⁴)] 3-ethyl-4-propyl isoquinolone semicarbazone and thiosemicarbawne [EPIQSC(HL⁵) and
EPIQTSC(HL⁶)] has been synthesized and characterized on the basis of
elemental analysis, IR spectra, electronic spectra, magnetic moment data
and conductivity measurements. The analytical data of all the complexes
indicates, 1 : 2 metal : ligand stoichiometry of the type [M(HL^1-6)₂] where
M = Co(II), Ni(II) and Cu(II). The ligands behaved as binegative tridentate
ligands and can coordinate through amine and imine nitrogen and oxygen/
sulphur donor atoms. The complexes were proposed to be octahedral
in geometry and the low value of conductivity indicates their non-electrolytic
nature.