Transition metal complexes of 20-22-membered octaazamacrocycles: synthesis and characterization

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• 作者：Shakir ; Mohammad ; Varkey ; Saji P. ; Nasman ; Omar S. M.
• 刊名：Polyhedron
• 出版年：1995
• 出版时间：May, 1995
• 年：1995
• 卷：14
• 期：10
• 页码：1283-1288
• 全文大小：284 K

文摘

A series of binuclear octaazamacrocyclic complexes [M₂L₁X₄]-[M₂L₂X₄] (M = Ni^II, Co^II and Zn^II; X = Cl or NO₃) and [Cu₂L₁]X₄-[Cu₂L₂]X₄ (X = Cl or NO₃) have been synthesized by template condensation reaction of aliphatic primary diamines with 3,6-dimethyl-4,5-diazaocta-3,5-diene-2,7-dione in methanol. The overall geometry and stereochemistry of these complexes have been elucidated by IR, ¹H NMR, EPR and electronic spectral studies, and magnetic susceptibility and conductance values. An octahedral geometry around the metal ion is suggested for nickel, cobalt and zinc complexes, whilst a square planar geometry is proposed for copper complexes.