• Sanjay Kumar
• Priyanka

Macrocyclic chelates of Co(II) and Ni(II) with nitrogen containing macrocyclic ligands (L1=1, 5, 8, 12 - tetraaza – 6, 7, 13, 14 – dibenzo – 2, 4, 9, 11- tetramethylcyclotetradeca – 1, 4, 8, 11 – tetraene, and L2= 1, 4, 8, 11 -tetraaza – 2, 3, 9, 10 – tetramethylcyclotetradeca - 1, 3, 8, 10 - tetraene) have been synthesized and characterised on the basis of elemental analyses, magnetic susceptibility and molar conductance measurements, IR and uv – visible spectral investigations. The Co (II) chelates have been formulated as [Co(L1) (H2O)2]Cl2 and [Co(L2) (H2O)2]Cl2 while the Ni(II) chelates have been formulated as [Ni(L1)Cl2] and [Ni (L2)Cl2 ]. All the synthesized metal chelates have been found to be paramagnetic. Co(II) chelates are 1:2 electrolyte while Ni(II) chelates are non – electrolytic in nature. Magnetic susceptibility values and the range of uv – visible spectral bands have suggested octahedral configuration of ligands around the metal ions. Nature of metal – ligand bonding has been established from IR – spectral investigations. The synthesised metal chelates displayed antibacterial activities. Ni(II) chelates exhibited antifungal activities, however, Co(II) chelates were not effective in restricting the fungal growth effectively..

Macrocyclic ligands, metal chelates, biological activities, IR and uv - visible spectra, etc.

"STUDY OF SOME NOVEL MACROCYCLIC CHELATES OF Co(II) AND Ni(II): SYNTHESIS, CHARACTERISATION AND BIOLOGICAL ACTIVITY ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 1, page no.1412-1422, January-2018, Available :http://www.jetir.org/papers/JETIR1801257.pdf

"STUDY OF SOME NOVEL MACROCYCLIC CHELATES OF Co(II) AND Ni(II): SYNTHESIS, CHARACTERISATION AND BIOLOGICAL ACTIVITY ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 1, page no. pp1412-1422, January-2018, Available at : http://www.jetir.org/papers/JETIR1801257.pdf