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Synthesis, Spectroscopic and Physico-chemical Studies and X-Ray Structure determination of a Metal transitions Complexes from ligand generated by benzoylpyridine

Metals transition complexes, [M(Li)(H2O)2].(X)2.(H2O)n, (M= Mn, Ni, Cu or Zn; i=1 or 2; n=0, ½, 1 or 2) where L1 is the neutral tridentate Schiff base (E)-N1-(2-(phenyl(pyridin-2-yl)methyleneamino)ethyl)ethane-1,2-diamine and L2 is the neutral tetradentate Schiff base N-(phenyl(pyridine-2-ylmethylene)-2-(2-(2-(phenyl(pyridine-2-yl)methyleneamino)ethoxy)ethoxy)ethanamine both derived from benzoylpyridine. All these complexes were synthesized and characterized by physicochemical methods and spectroscopic studies. Both ligands are coordinated to the central atom as tetradentate through four nitrogen atoms. Each metal ion is also coordinated with two water molecules yielding octahedral complexes. The single crystal X-ray determination was also used to establish the structure of the complex (2) formulated as [Ni(L1)(H2O)2].(Cl)2. The asymmetric unit contains one molecule of the complex and two uncoordinated chloride anions. The complex crystallizes in the triclinic space group P? with unit cell dimensions a = 8.590 (1) Å, b = 8.786 (1) Å, c = 13.134 (1) Å, ? = 88.684 (1)°, ? = 76.883 (1)°, ? = 86.789 (1)°, V = 963.81 (17) Å3, Z = 2, R1 = 0.0312 and wR2 = 0.0762. The coordination polyhedron around the Ni atom is best described as a distorted octahedron. Keywords: Schiff base, Complex, NMR, IR, Octahedral, Crystal structure.

Auteur(s) : Djiby LO, Ibrahima Elhadj THIAM, Moussa DIENG, Mouhamadou Moustapha SOW, Ousmane DIOUF, Mohamed GAYE
Pages : 05-12
Année de publication : 2018
Revue : IOSR Journal of Applied Chemistry
N° de volume : Volume 11, Issue 1
Type : Article
Statut Editorial : International Organization of Scientific Research
Mise en ligne par : THIAM Ibrahima El Hadji