Synthesis, Characterization and Electrochemistry of Some Metal Carbonyl Clusters Derived from Ferrocenylethynylpyridine
| Autor: | Hua Li, Wai Yeung Wong, Suk Ha Cheung, Nianyong Zhu, Qingchen Dong, Yih-Hsing Lo, Pui Ling Lau |
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| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Ligand Supramolecular chemistry Alkyne chemistry.chemical_element Metal carbonyl General Chemistry Condensed Matter Physics Photochemistry Biochemistry Oxidative addition chemistry.chemical_compound Crystallography chemistry Ferrocene Molecule General Materials Science Osmium |
| Zdroj: | Journal of Cluster Science. 26:461-471 |
| ISSN: | 1572-8862 1040-7278 |
| DOI: | 10.1007/s10876-015-0861-2 |
| Popis: | The chemical reactivity of ferrocenylethynylpyridine ligand with some metal complexes has been studied. Ligation of this ferrocenyl-functionalized pyridyl metalloligand with triosmium carbonyl cluster [Os3(CO)10(NCMe)2] via oxidative addition led to a new supramolecular heterobimetallic cluster [Os3(CO)10(μ-H){μ-NC5H3C≡C(η5-C5H4)Fe(η5-C5H5)}] 1 in good yield. Coordination of Co2(CO)8 with the alkyne functionality of 1 gave another new heterotrimetallic cluster complex [Os3(CO)10(μ-H){μ-NC5H3{C2Co2(CO)6}(η5-C5H4)Fe(η5-C5H5)}] 2 in which the molecule possesses a Co2C2 core adopting the pseudo-tetrahedral geometry having the alkyne bond lying perpendicular to the Co–Co vector. Characterization of 1 and 2 by IR and 1H NMR spectroscopies indicated that these complexes consist of an orthometalated trinuclear carbonyl cluster unit rigidly connected to a ferrocenyl unit. Electrochemical studies on 1 and 2 revealed that both of them undergo a reversible one-electron oxidation at iron followed by an irreversible oxidation of the Os3 cluster core. Another simple mononuclear zinc(II) complex [ZnCl2{(NC5H4C≡C(η5-C5H4)Fe(η5-C5H5)}2] 3 was also prepared for comparison of the electrochemical data with those of 1 and 2. |
| Databáze: | OpenAIRE |
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