Estimation of the dipole moments of the excited state of di(2-methyl-6-chlorophenyl)carbazone and its Co(II), Ni(II) and Zn(II) complexes from the effect of solvent on their ultraviolet absorption spectra

Abstract

Di(2-methyl-6-chlorophenyl)carbazone (2M6CPC) and its Co(II), Ni(II) and Zn(II) complexes were synthesized and characterized by magnetic moment, and infrared and 1H-NMR spectral measurements. The solvent effect in a series of polar and non-polar solvents of varying dielectric constants and refractive indices was estimated by recording the electronic spectra (S1 band) of the above compounds. The data was used to determine the magnitude and direction of the electric dipole moments in the first electronically excited state. The results indicate that the observed band systems in these compounds may be attributed to a π→π* transition.

Keywords

• carbazone
• electric dipole moments
• dielectric constants
• π→π* transition