germanium compounds cyclic

germanium compounds cyclic

  • Electrodeposition of germanium at elevated temperatures and

    Apr 10, 2015 Cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), rotating ringdisk electrode (RRDE), scanning electron microscope (SEM), Xray To prevent the evaporation of the electroactive germanium compound, we used a new germanium compound [GeCl4(BuIm)2] (where BuIm 

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  • Synthesis and Study of Cyclic πSystems Containing Silicon and

    In the presence of 18crown6, dihalides 1 and 2 are reduced by potassium in tetrahydrofuran to give crystalline samples of the silole dianion [K(18crown6)+]2[C4Me4Si2] (21) and the germole dianion [K4(18crown6)3][C4Me4Ge]2 (22). Compound 21 adopts an inversesandwich geometry, while 22 is a dimer with a 

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  • Analysis of Germanium Hydride Molecular Clusters NCBI NIH

    Jan 28, 2011 Theoretical and experimental investigations [6] indie that Ge3 and Ge4 clusters have cyclic structures. Germanium also forms several compounds with 3D cyclic structures [7, 8], such as tetragermatetrahedrane (Ge4H4), hexagermaprismane (Ge6H6), octagermacubane (Ge8H8), dipentagermaprismane 

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  • Organometallic Chemical Vapor Deposition of Germanium from a

    Apr 16, 1996 Investigations into the kinetics and mechanism of the thermal decomposition of the novel organometallic precursor 1,3ditertbutyl1,3,2diazagarmolidin2ylidine are reported. On the basis of these results, thin films of surprisingly pure amorphous germanium were deposited at temperatures between about 

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  • LithiumIon (De)Insertion Reaction of Germanium ThinFilm

    Jan 9, 2009 Results on the crystallographic phase transitions, occurring upon Li(de)insertion of evaporated and sputtered germanium thin films are discussed. Moreover, the difference in reaction between evaporated and sputtered films is addressed. In addition, a detailed electrochemical investigation (cyclic 

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  • The molecular structure of organogermanium compounds

    or nearly planar, about the nitrogen atoms attached to germanium. In the cyclic compounds, the endocyclic angle at germanium is significantly compressed. (75.1~82.9"), probably as a result of the planarcoordinated nitrogen atom, although the same trend is still observed in the cyclodigermazane where the ring nitrogen.

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  • Germanium: Environmental occurrence, (PDF Download Available)

    Dec 19, 2017 The only naturally occurring organogermanium compounds are mono and dimethylgermanium which are believed to be formed by microbiological activity in although very sophistied technological uses of germanium exist, a better understanding of its biogeochemical importance, cycling and reactivity 

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  • recent advances in the chemistry of bivalent organic compounds of

    RECENT ADVANCES IN THE CHEMISTRY OF BIVALENT ORGANIC COMPOUNDS OF GERMANIUM, TIN AND LEAD. Michael F. Lappert,. Published Online: 20110427 DOI: https://doi/10.1515/MGMC.1994.17.14.183 

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  • Ge (Germanium) Compounds TCI America TCI Chemicals

    Ge (Germanium) Compounds,Ge (Germanium) Compounds.

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  • Germanium analogue of cyclobutadiene isolated Research

    Mar 10, 2018 It was isolated as air and moisturesensitive, but roomtemperature stable, dark red crystals. The researchers suggest that the polar Jahn–Teller distortion counteracts the system's cyclic 4πelectron antiaromaticity, in a similar way to the previously reported silicon analogue. They hope the compound will 

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  • Electrodeposition of germanium at elevated temperatures and

    Apr 10, 2015 Cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), rotating ringdisk electrode (RRDE), scanning electron microscope (SEM), Xray To prevent the evaporation of the electroactive germanium compound, we used a new germanium compound [GeCl4(BuIm)2] (where BuIm 

    >>Details
  • Group IVA. Carbon, Silicon, Germanium, Tin and Lead

    Carbon is a typical nonmetal, silicon and germanium are semimetals, and tin and lead are metals. However, the elements of group 4 have one important feature in common, namely each of them have four valence electrons. In its compounds carbon almost invariably completes its valence shell by forming four covalent 

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  • Synthesis and Characterization of Luminescent Cyclic Germanium

    May 17, 2013 The Synthesis and Characterization of Luminescent Cyclic Germanium. Compounds by. Teresa Bandrowsky. A dissertation submitted in partial fulfillment of the requirements for the degree of. Doctor of Philosophy (Chemistry). University of Missouri – St. Louis. May 2013 

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  • Just Accepted ACS Nano: Behavior of Germanium and Silicon

    Jul 12, 2017 The electrochemical behavior of binderfree, germanium and silicon nanowires as highcapacity anode materials for lithiumion battery systems is investigated in an ionic liquid electrolyte. Cyclic voltammetry, cycling tests, and impedance spectroscopy reveal a highly reversible lithium alloying/dealloying 

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  • Germanium: Organometallic Chemistry Encyclopedia of Inorganic

    Sep 14, 2015 On the other hand, the digermene (But2MeSi)2Ge=Ge(SiMeBut2)2 reacts with nucleophiles like quinones to form a dioxagermacyclopentene. Digermenes analogs of cyclopropenes, a germanium analog of 1,3butadiene with conjugated Ge=Ge double bonds, and cyclic compounds containing Ge=Ge 

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  • The molecular structure of organogermanium compounds

    or nearly planar, about the nitrogen atoms attached to germanium. In the cyclic compounds, the endocyclic angle at germanium is significantly compressed. (75.1~82.9"), probably as a result of the planarcoordinated nitrogen atom, although the same trend is still observed in the cyclodigermazane where the ring nitrogen.

    >>Details
  • Analysis of Germanium Hydride Molecular Clusters NCBI NIH

    Jan 28, 2011 Theoretical and experimental investigations [6] indie that Ge3 and Ge4 clusters have cyclic structures. Germanium also forms several compounds with 3D cyclic structures [7, 8], such as tetragermatetrahedrane (Ge4H4), hexagermaprismane (Ge6H6), octagermacubane (Ge8H8), dipentagermaprismane 

    >>Details
  • Synthesis and Characterization of Luminescent Cyclic Germanium

    May 17, 2013 The Synthesis and Characterization of Luminescent Cyclic Germanium. Compounds by. Teresa Bandrowsky. A dissertation submitted in partial fulfillment of the requirements for the degree of. Doctor of Philosophy (Chemistry). University of Missouri – St. Louis. May 2013 

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  • Section 4: Compounds (Continued)

    Ge. Organogermanium Compounds Part 6. Mn Manganese Volume A3a. Manganese Volume A5a. Manganese Volume A5bl. Mo Molybdenum Supplement Volume cyclic esters. Hydrated anionic BO species and peroxoborates are treated separately. Literature closing date: 1988. 1993. 23 figs. XVI, 297 pages. Cloth.

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  • The chemistry of organic germanium, tin and lead compounds Library

    are cyclic dimers [R2Sn(OH)Cl]2 or [R2Sn(OH)2 Ð R2SnCl2], or even high oligomers. Organylstannantriols RSn(OH)3 have not yet been isolated. Consequently, organotin compounds R2Sn(OH)2 and RSn(OH)3 are less stable than their isostructural compounds of silicon and germanium, which in turn are not highly stable.

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  • A ChlorineFree Protocol for Processing Silicon, Germanium, and Tin

    [1]. Some germanium complexes have shown good alytic activity in the polymerization of raclactide (a cyclic ester), which forms the biodegradable polymer, polylactide.[8]. Germanium compounds are being investigated as alysts for the fluorination of hydrocarbons, to generate hydrofluorocarbons (HFCs) to replace.

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  • Comparative chemistry of isolable divalent compounds of silicon

    Comparative chemistry of isolable divalent compounds of silicon, germanium, and tin. However, the extent of the sigmapi conjugation in metallylenes 13 was much smaller than the electrondonating effects of neighboring nitrogen atoms in known stable cyclic diaminosubstituted metallylenes, and hence metallylenes 

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  • Plasmaassisted atomic layer deposition of germanium antimony

    As expected, this saltlike compound was found to be nonvolatile and therefore unusable as precursor for GST thin film deposition. . In the case of GST, the deposition rate was very similar to the deposition rate of Ge thin films (about 1 nm/100 cycle) and the deposition rate did not change with increasing of injection time.

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  • Germanium powder, −100 mesh, ≥99.999% trace metals basis

    Condensed matter : an Institute of Physics journal, 25(25), undefined (20121215). We report an ab initio study of the semiconducting Mg(2)X (with X = Si, Ge) compounds and in particular we analyze the formation energies of the different point defects with the aim of understanding the intrinsic doping mechanisms. We find 

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  • Analysis of Ge132 and development of a simple oral anticancer

    May 6, 2011 Organogermanium compounds including Ge132 have characteristic low toxicity and are readily excreted via the kidney with very low accumulation in .. These clusters indie either incomplete fragmentation of the solid structure or formation of new linked Ge132 units, possibly cyclic and linear.59–61.

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  • Synthesis and Study of Cyclic πSystems Containing Silicon and

    In the presence of 18crown6, dihalides 1 and 2 are reduced by potassium in tetrahydrofuran to give crystalline samples of the silole dianion [K(18crown6)+]2[C4Me4Si2] (21) and the germole dianion [K4(18crown6)3][C4Me4Ge]2 (22). Compound 21 adopts an inversesandwich geometry, while 22 is a dimer with a 

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  • Stabilization of lowvalent group 14 element Scholarship at UWindsor

    Apr 9, 2012 crown ethers and glymes in stabilizing germanium and tin complexes in low oxidation states supported by either Table 5.4 Summary of cyclic voltammetry data obtained for the ligand complexes of. SnOTf2. . compounds to perform "transitionmetal like" chemistry such as small molecule activation. 50.

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  • OSA Enhanced directgap light emission from Sicapped n+Ge

    Enhanced directgap light emission is reported for Sicapped n+Ge layers on Si after postgrowth rapid cyclic annealing (RCA), and impact of nonradiative recombination (NRR) at the Ge/Si interface is discussed toward Ge/Si double heterostructure (DH) lasers. Pdoped n+Ge layer (1 × 1019 cm−3, 400 nm) is grown on Si 

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