Synthesis and Physico‐chemical Studies on a 15‐Membered Hexaaza Macrocyclic Ligand Derived from Hydrazine and Its Complexes with Co(II), Ni(II), Cu(II), and Zn(II)
摘要:
The macrocyclic ligand, 1,2,6,9,13,14-hexaaza-3,5,10,12-tetramethyl-cyclopentadecane-2,5,9,12-tetraene (L), has been prepared by the condensation reaction of hydrazine, formaldehyde, ethylenediamine, and 2,4-pentanedione in 2 : 1 : 1 : 2 molar ratio. Metal complexes of the type [MLX2] (M = Co(II), Ni(II), Cu(II), and Zn(II); X = Cl or NO3) have been synthesized by the reaction of L with the corresponding metal salts in methanol. The macrocyclic ligand (L) and its metal complexes have been characterized by elemental analyses, Fr-IR and H-1 and C-13 NMR spectral studies. The stereochemistry of the metal complexes have been deduced from magnetic moments and band positions in the electronic spectra.