Synthesis of a mixed cluster/binuclear compound. Electrochemical properties and X-ray diffraction structure of Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1998-09

AUTHORS

Michael P. Castellani, Simon G. Bott, Michael G. Richmond

ABSTRACT

The tetrahedrane cluster Co3(Co)9(μ3-CCO2CH2C≡CH) reacts with Co2(CO)6 to furnish the pentacobalt compound Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] in high yield. Functionalization of the pendant alkyne group by Co2(CO)6 was ascertained by IR and NMR spectroscopies (1H and 13C), and the solid-state structure of Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] was unequivocally established by X-ray diffraction analysis. Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] crystallizes in the triclinic space group , a = 7.9674(5), b = 13.208(1), c = 13.3094(9) Å, α = 76.257(6), β = 79.123(6), γ = 86.403(6)°, V = 1335.8(2) Å3, Z = 2, and dcalc = 2.016 g/cm3. The electrochemical properties of Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] were examined by cyclic voltammetry and the first reduction wave was found to be a reversible, one-electron reduction associated with the tricobalt moiety. No evidence for electronic communication between the Co3 and Co2 portions of the complex was observed. The results of extended Hückel MO calculations on Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}] establish the nature of the LUMO in Co3(CO)9[μ3-CCO2CH2CCH{Co2(CO)6}]. More... »

PAGES

693-699

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1021700201583

DOI

http://dx.doi.org/10.1023/a:1021700201583

DIMENSIONS

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