Preparation of neodymium (III) and samarium (III) complexes with Bis (furfurylidene) - O - phenylenediamine and Furfurylidene - O- aminophenol schiff basis

Nine new complexes of general formulate [M (FPD)2 X3, [M (FAP)2] X3 and [M2 (FAP)2 X4] (where M is Nd (III) or Sm (III), FAP is bis (furfuaralidene) 0-phenylenediamine, FAP is furfurylidene o-aminophenol and X is Cl or NO3 have been prepared and characterized by physical and chemical met hodes. The ligand FPD acts as neutral tetradentate ligand in both neutral and basic media giving cationic complexes. On the other hand, FAP acts as neutral tridentate in neutral or slightly acidic solution giving cationic complexes, while in basic solution acts as monobasic tridentate ligand giving oxygen bridged dinuclear complexes. The metals in these complexes are octa coordinated for FPD with most probable square antiprism or dodecahedron structure and hexacoordinated for FAP with most probable octahedral structure. (author). 21 refs., 1 fig., 2 tabs