Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Synthesis, characterization and electrochemistry of some metal carbonyl clusters derived from ferrocenylethynylpyridine

Language

English

Abstract

© 2015, Springer Science+Business Media New York. 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.

Keywords

Alkyne, Cluster, Cobalt, Ferrocene, Osmium

Publication Date

2015

Source Publication Title

Journal of Cluster Science

Volume

26

Issue

2

Start Page

461

End Page

471

Publisher

Springer Verlag

DOI

10.1007/s10876-015-0861-2

Link to Publisher's Edition

http://dx.doi.org/10.1007/s10876-015-0861-2

ISSN (print)

10407278

ISSN (electronic)

15728862

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