Complexes mononucléaires et polynucléaires à base demétaux de transition, synthèse et caractérisation structurale .

Abstract

In this work we were interested in the synthesis and characterization of two coordination complexes based on transition metals, using as the organic ligands derived fromsalicylhydrazide.The first compound is a new mononuclear complex based on Mn(II) with general formula [Mn(H2bshac)(MeOH)2py].MeOH. In this case, the reaction of thesalicylhydrazide with manganese (II) acetylacetonate, leads to the in situ formation ofthe Schiff base: acetylacetonebis (salicylhydrazone) coordinated to a Mn (II) central ion. The structural study by single crystal X-ray diffraction showed that this compound crystallizes in the monoclinic crystal system with space group C2/c, where the metal ion is in pentagonal bipyramidal geometry. The second compound is the first coordination polymer based on N,N-disalicyloylhydrazine and Cu (II) ion, with general formula [Cu2(bsh)(Py)2]n. In this case the reaction of the ligand salicylhydrazide with copper acetate (II), leads to the in situ formation of a bis-hydrazide N, N-disalicyloylhydrazine: bridging two ions Cu (II). Which crystallizes in the space group P21/c of a monoclinic system. The copper ion (II) adopts a square pyramidal geometry