Synthesis and Complexes of New Multidentate Ligands

摘要

Hydrogenation of the Schiff bases (py)2C#x2ED;N(CH2)2N#x2ED;C(py)2and (py)2C#x2ED;N(CH2)3N#x2ED;C(py)2(py#x2ED;2-pyridyl) produces the new hygroscopic ligands (py)2CHNH(CH2)2NHCH(py)2I and (py)2CHNH(CH2)3NHCH(py)2II. Bubbling HCl gas through ethanolic solutions of I forms the more stable hydrochloride salt of formula C24H24N6#xB7;6HCl#xB7;4H2O. Reactions of I with CoCl2#xB7;6H2O, CoBr2#xB7;6H2O and NiBr2#xB7;3H2O in tetrahydrofuran form the solids (CoCl2)2(I), (CoBr2)2(I) and (NiBr2)2(I)#xB7;H2O. These new ligands and complexes were characterized using NMR, IR, conductivity and thermogravimetric techniques.