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Issue 24, 2009
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Novel derivatives of hypervalent germanium: synthesis, structure, and stability

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Abstract

Syntheses of a series of novel germanium complexes, viz. RN(CH2CH2NC6F5)2GeHal2 (1, R = Me, Hal = Cl; 2, R = Me, Hal = Br; 3, R = PhCH2, Hal = Cl; 4, R = PhCH2, Hal = Br), as well as MeN[CH2(2-C4H3N)]2GeHal2 (5, Hal = Cl; 6, Hal = Br), by the reaction of GeHal4 with dilithium salts of corresponding triamines 7–9 are presented. PhCH2N(CH2CH2NSiMe3)2GeCl2 (10) was prepared analogously from triamine 11. Other approaches to the synthesized compounds were also tested. Unexpected complexes [N[upper bond 1 start](CH2CH2NSiMe3)2Ge[upper bond 1 end](Hal)]2 (12, Hal = Cl; 13, Hal = Br) were obtained by the reaction of GeHal4 with dilithium salt of Me3SiN(CH2CH2NHSiMe3)2 (14). DFT calculations on this reaction were carried out and discussed. Composition and structures of the novel compounds were established by elemental analyses, 1H, 13C, and 19F NMR spectroscopy. The X-ray structural studies of 1–4 and 12 clearly indicated the presence of a transannular interaction N(ax)→Ge for all studied compounds.

Graphical abstract: Novel derivatives of hypervalent germanium: synthesis, structure, and stability

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Publication details

The article was received on 29 Jan 2009, accepted on 31 Mar 2009 and first published on 06 May 2009


Article type: Paper
DOI: 10.1039/B901885A
Citation: Dalton Trans., 2009, 4695-4702
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    Novel derivatives of hypervalent germanium: synthesis, structure, and stability

    E. Kh. Lermontova, M. Huan, A. V. Churakov, J. A. K. Howard, M. V. Zabalov, S. S. Karlov and G. S. Zaitseva, Dalton Trans., 2009, 4695
    DOI: 10.1039/B901885A

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