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The Schiff base ligand trans-N,N′-bis[2-pyridinecarboxylidene]  cyclohexane-1,2-diamine (L) was synthesized. This ligand when stirred with 1  equiv of MCl2.xH2O (M = Cu, Co, Zn) in ethanol, undergoes partial hydrolysis  of the imino bond and the result tridentate ligand (L') and immediately forms  the complexes with N3 coordination sphere. The reactions of L with MCl2.xH2O  (M = Cu, Co, Zn) in THF give complexes [ML]Cl2. The ligand (L), complexes  [M(L')Cl]Cl and [ML]Cl2 were characterized by elemental analysis, UV-Vis,  FT-IR, 1H NMR, GC/MS and luminescence properties. The 1H NMR spectra of the  ligand and its diamagnetic complexes were recorded in CDCl3 and DMSO  solvents, respectively. Obtained data confirm that the donor atoms N in  ligand coordinated to the metal ions. The luminescence studies show ligands  and their complexes display intraligand (π-

journal of the serbian chemical society

Solvent-dependent synthesis and mono-hydrolysis of di-Schiff base of (+/-)trans-1,2-cyclohexanediamine and 2-pyridinecarboxaldehyde in Cu(II), Co(II) and Zn(II) complexes