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Issue 3, 2018
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1,2-Dihalodigermenes bearing bulky Eind groups: synthesis, characterization, and conversion to halogermylenoids

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Abstract

1,2-Dihalodigermenes, (E)-(Eind)XGe[double bond, length as m-dash]GeX(Eind) (X = Br and Cl), bearing the fused-ring bulky Eind group (Eind = 1,1,3,3,5,5,7,7-octaethyl-s-hydrindacen-4-yl) have been isolated as orange-yellow crystals by the ligand redistribution reaction between the diarylgermylene, (Eind)2Ge:, and GeX2·dioxane in toluene via the cleavage and recombination of the Ge–C and Ge–X bonds. The dihalodigermenes have a Ge[double bond, length as m-dash]Ge double bond character in the crystalline state, but dissociate into halogermylenes, (Eind)XGe:, in solution. The addition of excess LiBr to the THF solution of the bromogermylene, (Eind)BrGe:, led to the formation of an equilibrium mixture containing the lithium bromogermylenoid, [Li+][(Eind)GeBr2]. The bromogermylenoid can be isolated as a cryptand-separated potassium ion pair, [K+(crypt-222)][(Eind)GeBr2], which has been structurally characterized.

Graphical abstract: 1,2-Dihalodigermenes bearing bulky Eind groups: synthesis, characterization, and conversion to halogermylenoids

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Publication details

The article was received on 11 Oct 2017, accepted on 07 Dec 2017 and first published on 08 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT03819D
Citation: Dalton Trans., 2018,47, 814-822
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    1,2-Dihalodigermenes bearing bulky Eind groups: synthesis, characterization, and conversion to halogermylenoids

    N. Hayakawa, T. Sugahara, Y. Numata, H. Kawaai, K. Yamatani, S. Nishimura, S. Goda, Y. Suzuki, T. Tanikawa, H. Nakai, D. Hashizume, T. Sasamori, N. Tokitoh and T. Matsuo, Dalton Trans., 2018, 47, 814
    DOI: 10.1039/C7DT03819D

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