Synthesis and characterisation of some novel Schiff base metal complexes with polyoxyethylene glycols as substituents

Two novel Schiff base ligands containing oxyethylene glycol chains, N-(4-pe ntaoxyethyleneglycolphenyl)salicylaldimine, HL1, and N-(4-nonaoxy ethyleneg lycolphenyl)salicylaldimine, HL2, were synthesized by reacting salicylaldeh yde with 4-aminophenylpentaoxyethylene glycol or S-amino phenylnonaoxyethyl ene glycol, respectively. Their nickel(II), copper(II) and cobalt(II) compl exes were synthesised. The novel Schiff base ligands and their complexes we re characterized by elemental analyses, H-1 NMR, infrared and UV-Visible sp ectra. The analytical data show that the metal to ligand ratio in the compl exes is 1:2.