Hexaaza Macrocyclic Metal Complexes Containing Biimidazole. 1. Synthesis and Characterization of Nickel(II), Copper(II), and Palladium(II) Complexes of 2,7-dimethyl-3-6-(1,1′-(2,2′-biimidazolo))-1,3,6,8,11,14- Hexaazacyclohexadeca-1,7-diene
Abstract
New Ni(II), Cu(II), and Pd(II) metal complexes of the macrocycle 2,7-dimethyl-3-6-(1,1′-(2,2′-biimidazolo))-1,3,6,8,11,14- hexaazacyclohexadeca-1,7-diene have been synthesized and characterized. The Pd(II) complex, which is proposed to contain three 5-membered rings, one 9-membered ring, and two imine linkages, was obtained as an air-stable, insoluble, yellow, diamagnetic compound. Corresponding orange to blue Ni(II) complexes were obtained as the diamagnetic iodide or perchlorate species and paramagnetic chloro and bromo complexes. The Cu(II) complex was obtained as a blue paramagnetic perchlorate complex. FT-IR, NMR, and electronic spectral data have been used to confirm macrocycle formation from metal-trien complexes reacting with 1,1′-diacetyl-substituted 2,2′-biimidazole in water/dioxane or 2-propanol/dioxane mixtures at pH 5. The formation of these amorphous complexes demonstrates how ring formation can be achieved over 1,1′-diacetyl-2,2′-biimidazole hydrolysis due to the metal ion template effect. © 1988 American Chemical Society.
Recommended Citation
S. S. Kandil and H. L. Collier, "Hexaaza Macrocyclic Metal Complexes Containing Biimidazole. 1. Synthesis and Characterization of Nickel(II), Copper(II), and Palladium(II) Complexes of 2,7-dimethyl-3-6-(1,1′-(2,2′-biimidazolo))-1,3,6,8,11,14- Hexaazacyclohexadeca-1,7-diene," Inorganic Chemistry, American Chemical Society (ACS), Dec 1988.
The definitive version is available at https://doi.org/10.1021/ic00298a009
Department(s)
Chemistry
International Standard Serial Number (ISSN)
0020-1669
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1988 American Chemical Society (ACS), All rights reserved.
Publication Date
01 Dec 1988
