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Formation and Reactions of Mono- and Di-substituted Derivatives of 4-Ge2>, containing Functional μ-GeRH or μ-GeRCl Groups

DOI: 10.1039/DT9930000715

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 715 - 722 (1993)

Update date:2022-08-05

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Authors:

Lee, Siew KimLee, Siew Kim

Mackay, Kenneth M.Mackay, Kenneth M.

Nicholson, Brian K.Nicholson, Brian K.

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Article abstract of DOI:10.1039/DT9930000715

The reaction of <μ4-Ge2> 1 with GeRH3 (R = Et or Ph) has been found to give <μ4-Ge> 2 or <μ4-Ge2> 3 depending on the stoichiometries and conditions.Analogues of 2 or 3 with μ-GeMeCl groups form from 1 and GeMe(Cl)H2.Reaction of 2 with gives an open cluster with a μ-Ge(R)Co(CO)4 group which readily condenses to a closo-cluster with a Ge2Co4 core.Analogous reactions of 3 with ultimately give clusters (CO)10> again via more-open intermediates.Corresponding species are obtained from the μ-GeMeCl compounds and (1-).An X-ray structure analysis of 4-GeEt)2<μ-GeCo2(CO)7>(CO)10> has been performed: triclinic, space group P<*>, a = 10.617(1), b = 16.895(3), c = 9.822(4) Angstroem, α = 104.22(2), β = 94.40(2), γ = 102.03(1) deg, Z = 2, R = 0.027, for 3516 data with I > 2 ?(I).It reveals a structure consisting of a pseudo-octahedral Ge2Co4 unit, with one of the Co-Co bonds edge-bridged by a μ-GeCo2(CO)7 moiety.

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