Aryl Germanes as Ligands for Transition Polymetallic Complexes: Synthesis, Structure, and Properties

Kirill V. Zaitsev, Kevin Lam, Oleg Kh Poleshchuk, Stanislav I. Bezzubov, Andrei V. Churakov

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    Abstract

    A series of new carbonyl dichromium complexes bearing aryl germanes as ligands were prepared using improved approaches. The thermal reaction of Cr(CO)6 (1) with Me3GeGePh3 (3) led to the formation of Me3GeGePh[(η6-C6H5)Cr(CO)3]2 (3a). The lithiation of [(η6-C6H6)Cr(CO)3] (2) with nBuLi followed by the addition of Me2GeCl2 (4) or ClGeMe2GeMe2Cl (5) gave Me2Ge[(η6-C6H5)Cr(CO)3]2 (4a) and [(OC)3Cr(η6-C6H5)]GeMe2GeMe2[(η6-C6H5)Cr(CO)3] (5a), respectively. The molecular structures of 3a and 4a, in their crystal forms, were studied by X-ray diffraction analysis. The crystals of oligogermane 3a have shown to undergo a fully reversible phase transition at 160 K without any sign of decomposition. The complexes synthesized were also studied by multinuclear NMR, IR and UV/Vis spectroscopy, DFT calculations and electrochemistry. The presence of a Cr(CO)3 group in a range of oligogermanes has shown to impact on the physical and chemical properties of the compounds.

    Original languageEnglish
    Pages (from-to)2750-2760
    Number of pages11
    JournalEuropean Journal of Inorganic Chemistry
    Volume2019
    Issue number22
    DOIs
    Publication statusPublished - 16 Jun 2019

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    Keywords

    • Chromium
    • Donor-acceptor properties
    • Germanium
    • Reversible phase transition
    • σ-Conjugation

    ASJC Scopus subject areas

    • Inorganic Chemistry

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