Synthèse, étude structurale et propriétés magnétiques de nouveaux matériaux moléculaires inorganiques

Abstract

This thesis concerns the synthesis, the structural and magnetic characterization of new inorganic molecular materials based on carboxylate ligands namely trans- cinnamic acid and two of it derivatives: the 2-meo-cinnamic and 3-meo-cinnamic acids, associated to polyamine co-ligands namely: the 1,10-phenantroline and the 4,4’-bipyridine. During this work, we have obtained: G Three trimers of cobalt (II) with cinnamic acid and it derivatives : Ç [Co3II (cinna)6(phen)2] 2, (1) Ç [Co3II (2-meo-cinna)6(phen)2], (2) Ç [Co3II (3-meo-cinna)6(phen)2] (3) G Three dimers of copper (II) with cinnamic acid and it derivatives : Ç [Cu2II(cinna)2(phen)2(NO3)(H2O)].NO3.CH3OH, (1) Ç [Cu2II(2-meO-cinna)2(phen)2(NO3)(H2O)].2 NO3.H2O, (2) Ç [Cu2II(3-meO-cinna)2(phen)2(NO3)(H2O)].NO3.3 H2O (3) G two complexes were obtained but only with les polyamine ligands: Ç A coordination polymer of CoII and the 4,4’-bipyridine with the formula : {[CoII(4,4’-bpy)2(H2O)2].(NO3)2.4H2O} n, Ç A dimer of CuII and the 1,10’-phenantroline with the formula: [Cu2II(phen)2Cl2(NO3)2]. The magnetic properties of all the compounds were analyzed in detail and were interpreted on the basis of their crystal structure.