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Synthesis, spectroscopic studies and crystal structure determination of a Zn(II) complex of 1-(2-hydroxybenzylidene)thiosemicarbazide

The ligand 1-(2-hydroxybenzylidene)thiosemicarbazide (H4L) was prepared by reaction of thiosemicarbazide and 2-hydroxybenzaldehyde in a reflux ethanol solution. The complexes are prepared by reaction of the ligand with the appropriate metal salt in methanol solutions. Elemental analysis, IR and UV spectroscopies, conductance measurement, fluorescence and room temperature magnetic susceptibility measurement were used to characterize the compounds. For the zinc complex its structure was determined by single X-ray diffraction technic. The zinc compound crystallizes in the tetragonal space group I41/cd with the following unit cell parameters: a = 14.1357(3) Å, b = 24.9289(9) Å, V = 4982.2(3) Å3 , Z = 16, R1 = 0.033 and wR2 = 0.08. In the crystal of the mononuclear complex [Zn2(H3L)2Cl2].(CH3OH)2 each Zn(II) center is five coordinated by one nitrogen atom, one thionyl sulfur atom and one phenoxo oxygen atom of the ligand and one chloride atom. For the two ligand molecule the phenoxo oxygen atom acts as bridge between the two Zn(II) ions. For both metal centers the coordination polyhedron is best described as a pentagonal pyramid. The molecules are linked together by multiple hydrogen bond interaction resulting in a three-dimensional network. Keywords: Schiff base, metal transition, crystal, luminescence, square pyramidal.

Auteur(s) : Ousmane SALL1 , Moussa DIENG2 , MouhamadouMoustaphaSOW2, Diery DIOUF1 , IbrahimaElhadj THIAM1 , Pascal RETAILLEAU3 , Mohamed GAYE
Pages : 27-37
Année de publication : 2020
Revue : IOSR Journal of Applied Chemistry (IOSR-JAC)
N° de volume : 13(4)
Type : Article
Mise en ligne par : GAYE Mohamed Lamine