Abstract:
The metal chelates formed through the reaction of Cu (II), Co (II), Ni (II), Mn (II) and Zn (II) with 2-methyl 5-methoxy 7-byd-roxy chromone 6-acetyl hydraxone are investigated by the use of spectrophotometric, electric conductance and pH titration measurement. Isolation of solid complexes and physical measurements revealed the existence of mono and big ligand complexes in the keto-form. Complex formation has been shown to take place through a proton displacement from the hydroxy group in 7-position of the chromone residue and also with the azomethine and carbonyl groups of acetyl hydrazide residue. Spectrophotometric studies supported the using of this ligand for the microdetermination of small quantities of metal ions in solution. The apparent formation constants of the complexes are also determined. The visible absorption spectra of the solid complexes in dimethyl formamide indicate that all these complexes have a distorted octahedral configuration.
Page(s):
172-177
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 20, Issue: 3, Year: 1977