The Effect of Monodentate Ligands on the Structure of Co(II) Complex with a Tridentate Schiff Base

Department of Chemistry, Jadavpur University, Calcutta-700 032

Manuscript received 14 May 1976 ; accepted 10 November 1976.

A tridentate Schiff base, o-carboxy N-phenylsalicylaldimine, along with a number of monodentate ligands produced three types of cobalt(II) complexes, Co(C₁₄H₂O₃N) X₂.2H₂O, where X=pyridine or α-picoline, Co(C₁₄H₂O₃N) X, where X =pyridine or picolines (α, β and \(\gamma\)) and Co(C₁₄H₉O₃N)2H₂O. The apparently quadri-coordinated complexes appear to have octahedral structures where the carboxyl group of Schiff base acts as a bidentate ligand. The dipyridine and the dipicoline (α) complexes are also octahedral but their structures differ from one another as revealed by IR and TG studies.