Author: Sushil Kumar, Anupma, Shweta Soam, Sulekh Chandra and Hariom Kumar Kaushik

DOI: http://doi.org/10.31788/RJC.2022.1558155

The new tetra dentate aza-macrocyclic ligands LA prepared by 2,6 –diamino pyridine and 3-methyl-2,4-pentadione, Ligand LB prepared by 2,6-diamino-pyridine and 3-ethyl-2,4-pentadione, Ligand LC was prepared with the reaction of 5-bromo-2,3-diamino-pyridine with. 3-methyl-2,4-pentadione and Ligand LD were prepared with the reaction of 5-bromo-2,3-diamino-pyridine with 3-ethyl-2,4-pentadione. Ethyl Alcohol was used in the preparation of ligands as a solvent. All the Ligands were characterized with the help of elemental and spectral studies. Cr(III) complexes were prepared with these newly synthesized ligands. All the newly synthesized Chromium complexes are known to bind with overall composition M(L)X3 [where {M Cr(III), X = Cl- , & NO3,}]. Cr(III) complexes are categorized by electronic spectral studies, Electron paramagnetic resonance spectroscopy, Infrared spectroscopy, mass spectroscopy, magnetic susceptibility measurements, and conductivity bridge measurements, and with the help of these studies Cr(III) complexes were allocated with octahedral geometry.

Keywords: Spectroscopic, Cr(III) Macrocyclic Complexes, 5-bromo-2,3-diaminopyridine, Tetradentate azamacrocyclic, 2,6- diamino-pyridine.