Compounds of Group 14 Elements with an Element–Element (E = Si, Ge, Sn) Bond: Effect of the Nature of the Element Atom

Autor:	Kirill V. Zaitsev, Sergey S. Karlov, Viktor A. Tafeenko, Elmira Kh. Lermontova, Oleg M. Nikitin, Oleg Kh. Poleshchuk, Boris N. Tarasevich, Tatiana V. Magdesieva, Anastasia V. Kharcheva, Galina S. Zaitseva, Andrei V. Churakov
Rok vydání:	2015
Předmět:	Carbon group Chemistry Organic Chemistry Analytical chemistry chemistry.chemical_element Inorganic Chemistry Ultraviolet visible spectroscopy Atom Bathochromic shift Physical chemistry Lithium Physical and Theoretical Chemistry Cyclic voltammetry Phosphorescence Tin
Zdroj:	Organometallics. 34:2765-2774
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om501293t
Popis:	Two series of germanium compounds, (p-Tol)3Ge-MMe3 (M = Si (1), Ge (2), Sn (3)) and (Me3Si)3Ge-MPh3 (M = Ge (4), Sn (5)), were prepared using lithium or potassium intermediates. The changing of the reaction conditions results in trigermane Ph3Ge-Ge(SiMe3)2-GePh3 (6). The molecular structures of 1, 2, and 6 were investigated by X-ray analysis. By UV/visible spectroscopy it is established that introduction of a tin atom results in a significant bathochromic absorption shift. Furthermore, according to cyclic voltammetry, oxidation potentials decrease in the order 1 > 2 > 3. The electronic structures of 1–4 and related (Me3Si)3Ge-SiPh3 were investigated by DFT calculations. Fluorescence properties of 1–3 were studied in the solid state and in solution; for compound 3 phosphorescence (lifetime is 4.58 ms) is observed in the solid state.
Databáze:	OpenAIRE
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