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Synthesis, structural study and X-ray structure determination of transition metal complexes of 4-phenyl-1-(1-(pyridin-2-yl) ethylidene)thiosemicarbazide

Reaction of 4-phenylthiosemicarbazide and 2-acetylpyridine afforded the ligand 4-phenyl-1-(1- (pyridin-2-yl)ethylidene)thiosemicarbazide (H2L). Reaction of H2L and metal transition chloride salt in presence of potassium thiocyanate yield complexes formulated as [Mn(HL)2 .(SCN)].(H2O) (1), [Fe(HL)2].(SCN).(H2O) (2), [Co(HL)(H2L)].(SCN).(H2O) (3), [Ni(HL)(SCN)] (4), {[Cu(H2L).(SCN))](?- NCS)2[Cu(H2L).(SCN)]}.(H2O)2 (5), [Zn(H2L)(SCN)2] (6). Elemental analysis, IR, UV, molar conductivity and room temperature magnetic moment measurements were used for characterizing these compounds. The structures of [Fe(HL)2].(SCN).(H2O) (2) and [Zn(H2L)(SCN)2] (6) were determined by X-ray diffraction technic. The two mononuclear complexes (2) and (6) crystallize in the monoclinic space group P21/c. In [Fe(HL)2].SCN.H2O, the Fe3+ is hexacoordinated in an octahedral environment by two molecules ligand of H2L which acts in tridentate fashion via one imino nitrogen atom, one pyridyl nitrogen atom and one sulfur atom; one SCN- anion stabilize the complex and one lattice water molecule is present. In [Zn(H2L)(SCN)2], the Zn2+ is pentacoordinated in a bipyramidal trigonal environment by one ligand molecule of H2L which acts in tridentate fashion and two SCN-.

Auteur(s) : Pokpa HABA, Farba Bouyagui TAMBOURA, Adama SY, Mamour SARR, Madina DIALLO BA, Ibrahima Elhadji THIAM, Mohamed GAYE, Pascal RETAILLEAU, and Javier ELLE
Pages : 01-11
Année de publication : 2019
Revue : IOSR Journal of Applied Chemistry (IOSR-JAC)
N° de volume : 12
Type : Article
Mise en ligne par : THIAM Ibrahima El Hadji