Synthese de composes a liaison MIVBmercure. Precurseurs d'especes monovalentes (germynes), et bivalentes (germylenes), de radicaux centrometalles et d'intermediaires
作者:P. Riviere、A. Castel、J. Satge
DOI:10.1016/s0022-328x(00)85661-2
日期:1981.6
Polynuclear germylmercury compounds are obtained from the reaction of organohydrogermanes PhnGeH4−n or digermanes Ph2nGe2H4−n (n = 1, 2) with dialkylmercury R2Hg. Di- or tri-mercurated geminal polygermates thus synthesized generally present a low stability and undergo thermal- or photo-decompositions leading to the corresponding monovalent (germynes), divalent (germylenes) or, trivalent (germanium
多有机环锗烷基汞化合物是从有机氢锗酸Ph n GeH 4- n或二锗烷基Ph 2 n Ge 2 H 4- n(n = 1,2)与二烷基汞R 2 Hg的反应中获得的。如此合成的二或三聚汞的双聚锗酸酯通常表现出较低的稳定性,并且会发生热分解或光分解,从而导致相应的单价(锗烷),二价(亚锗烷)或三价(锗中心自由基)物种以及中间双自由基可以认为是锗双键化合物的极限形式。这样的中间体已经在化学和光谱学上表征。
Arylhydrogermyllithiums: synthèse et applications
作者:Annie Castel、Pierre Rivière、Jacques Satgé、Young-Hoon Ko
DOI:10.1016/0022-328x(88)80051-2
日期:1988.3
New organohydrogermyllithium are prepared in good yields from hydrogermolysis reactions with t-butyllithium in THF. Alkylatioin and germylation of the germaniumlithium bond in these compounds are efficientreactions and a convenient way for synthesis of organohydropolygermanes. These reagents are also useful for the formation of unknown hydrogermylmagnesium compounds
The bis(germyl)platinum complex [Pt(GeHPh2)(2)(dmpe)] (1) (dmpe = 1,2-bis(dimethylphosphino)-ethane) reacts with a small excess of H2GePh2 at 90 degrees C to produce four-membered germaplatinacycle [Pt(GePh2GePh2GePh2)(dmpe)] (2). Further reaction of 2 with excess H2GePh2 at 90 degrees C forms tetragermaplatinacyclopentane [Pt(GePh2GePh2GePh2GePh2)(dmpe)] (3), while 3 is obtained also by the direct reaction of excess H2GePh2 with 1 for a prolonged period. Complexes 1-3 were characterized by X-ray crystallography and NMR spectroscopy. Germaplatinacycles 2 and 3 react with H3GePh to cause cleavage of the Pt-Ge bonds and formation of the oligogermanes H(GePh2)(3)H and H(GePh2)(4)H, respectively.
A Series of Isopropyl-Substituted Oligogermanes Pr<sup><i>i</i></sup><sub>3</sub>Ge(GePh<sub>2</sub>)<sub><i>n</i></sub>GePr<sup><i>i</i></sup><sub>3</sub> (<i>n</i> = 0–3) Featuring a Luminescent and Dichroic Pentagermane Pr<sup><i>i</i></sup><sub>3</sub>Ge(GePh<sub>2</sub>)<sub>3</sub>GePr<sup><i>i</i></sup><sub>3</sub>
作者:Sangeetha P. Komanduri、F. Alexander Shumaker、Kimberly D. Roewe、Melanie Wolf、Frank Uhlig、Curtis E. Moore、Arnold L. Rheingold、Charles S. Weinert
DOI:10.1021/acs.organomet.6b00596
日期:2016.9.26
The series of oligogermanes (Pr3Ge)-Ge-i(GePh2)(n)GePr3i (n = 0, 2; n = 1, 3; n = 2, 4; n = 3, 5) were prepared by the hydrogermolysis reaction. All four species were characterized by NMR (H-1 and C-13) and UV/visible spectroscopy as well by cyclic voltammetry and differential pulse voltammetry. The oligogermanes exhibited a successive red shift in their absorbance maxima as the length of the Ge-Ge chain was increased, and these molecules also became easier to oxidize as the chain length was increased. The X-ray crystal structures of 4 and 5 as well as the trigermane HPh2GeGePh2GePh2H (6) were determined. The pentagermane 5 was shown to be dichroic in the solid state due to the packing of the individual molecules in a columnar fashion in the crystal. Pentagermane 5 is also luminescent in solution, exhibiting an emission maximum at 380 nm. The physical properties of 5, like the hexagermane (Pr3Ge)-Ge-i(GePh)(4)GePr3i, mimic the properties of the larger polygermane systems.