Hexaaza-dithia Macrocycles Containing Pendant Methoxyethyl Groups: Synthesis and Characterization of Mono and Dinuclear Nickel Complexes
| Autor: | Mathias Gressenbuch, Berthold Kersting |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Bicyclic molecule
010405 organic chemistry Stereochemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Medicinal chemistry Sulfur 0104 chemical sciences Inorganic Chemistry Nickel chemistry.chemical_compound chemistry Reagent Atom X-ray crystallography Spectroscopy Naphthalene |
| Zdroj: | Zeitschrift für anorganische und allgemeine Chemie. 642:719-723 |
| ISSN: | 0044-2313 |
| Popis: | The deprotection of two bicyclic hexaaza-dithioether macrocycles 1 and 2 containing four (or six) N-bound 2-methoxyethyl substituents was achieved in good yields utilizing Li or Na/naphthalene in THF as the reagent. The ability of the resulting hexaaza-dithiophenolate macrocycles (H2L4 and H2L5) to act as mono- and dinucleating ligands is also demonstrated. Three nickel complexes, namely [Ni(H2L4)][BPh4]2 (3), [Ni2(L4)(μ-OAc)][BPh4] (4), and [Ni2(L5)(μ-OAc)][BPh4] (5), were obtained and characterized by elemental analyses, ESI mass spectrometry, IR and UV/Vis spectroscopy, and in case of 3 and 4 also by X-ray crystallography. The five-coordinate nickel atom in complex 3 was found to interact only weakly with one of the four 2-methoxyethyl groups. The nickel atoms in dinuclear 4 and 5 are coordinatively saturated by the nitrogen and sulfur donor atoms of the macrocycle and the oxygen atoms of the bridging acetato coligands, such that the methoxyethyl substituents function only as dangling groups. |
| Databáze: | OpenAIRE |
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