• Anamika
• Bharat Prasad
• Shahla Illyas

A number of complexes of cobalt (II) of the type [Co (SB)X2 ] where X=chloride, acetate or nitrate and SB = a 18-member macrocyclic Schiff base ligand obtained by metal ion catalysed template macrocyclization between orthophenyl-enediamine and 2, 5–di formyl furan. The complexes possess characteristic colors, are non hygroscopic, sparingly soluble in water and can be stored for a long period without decomposition. Low value of molar conductivity in the range 7-10 Sm2 mol-1 indicated complexes to be non electrolytic in nature. Absence of N-H stretch of orthophenylenediamine, C=O stretch of 2, 5–di formyl furan and appearance of C=N stretch in the infrared spectra of complexes corroborates Schiff base condensation during macrocyclization. Low molar conductivity alongwith presence of vibrational bands characteristics of M-Cl, M-N and M-O stretch in the far infrared range indicated involvement of anions in coordination.

complexes of cobalt (II), macrocyclic Schiff base ligand, macrocyclization, Formyl furan.

"Complexes of Cobalt (II) with a 18-membered macrocyclic Schiff base ligand", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 7, page no.i670-i672, July-2023, Available :http://www.jetir.org/papers/JETIR2307896.pdf

"Complexes of Cobalt (II) with a 18-membered macrocyclic Schiff base ligand", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 7, page no. ppi670-i672, July-2023, Available at : http://www.jetir.org/papers/JETIR2307896.pdf