Cobalt (ii)‎, nickel (ii)‎, and copper (ii)‎ complexes with ligands contain nitrogen as donor atoms type n3 and azamacrocylic n6, synthesis and characterisation

Abstract EN

Two series of N3 Schiff base complexes [M L1 Cl] and 22-membered hexaazamacrocyclic complexes [ML2] (M = Co2+, Ni2+, and Cu2+) have been synthesised via the condensation reaction of para-nitobenzaldehyde with diethelyenetriammine to obtain [HL1] where [HL1] = N-[(4-nitrophenyl)methylene]-N'-(2-{[(4-nitrophenyl)methylene]amino}ethyl)ethane-1,2-diamine and diethylene triammine with 2,5hexane dione to from [HL2] where [HL2] = 8, 11, 19, 22-Tetramethyl-1, 4, 7, 12, 15,18hexaaza-cyclodocosa-7, 11, 18, 22-tetraene, in the presence of acetic acid as a catalyst in ethanol.

The prepared compounds were haracterized by FT- IR, 1H-NMR, and electronic spectral studies, conductivity, elemental microanalysis and magnetic moment measurements The mode of bonding and overall geometry of the complexes have been inferred through IR, and electronic spectral studies, conductivity, and magnetic moment measurements.

[Co Cl L1] is distorted tetrahedral, [Ni Cl3 L1] is octahedral, and [Cu Cl L1] is square planar, an octahedral geometry is proposed for [Co L2] and [Ni L2] complexes and square planar for [Cu L2].