germanium and carbene

germanium has been researched along with carbene* in 5 studies

Other Studies

5 other study(ies) available for germanium and carbene

ArticleYear
N-Heterocyclic Carbene Coinage Metal Complexes of the Germanium-Rich Metalloid Clusters [Ge₉R₃]
    Molecules (Basel, Switzerland), 2017, Jul-19, Volume: 22, Issue:7

    We report on the synthesis of novel coinage metal NHC (

    Topics: Coordination Complexes; Crystallography, X-Ray; Germanium; Heterocyclic Compounds; Methane; Models, Molecular; Molecular Structure; Organometallic Compounds; Stereoisomerism; X-Ray Diffraction

2017
Complexes of Ge(IV)- and Sn(IV)-fluorides with cyclic and acyclic carbenes: bis(dialkylamino)-difluoromethylenes as carbene sources.
    Inorganic chemistry, 2012, Jan-16, Volume: 51, Issue:2

    Carbene complexes of Ge(IV)- and Sn(IV)-fluorides have been synthesized by oxidative addition of 2,2-difluoro-1,3-dimethylimidazolidine and bis(dimethylamino)difluoromethane to GeCl(2)•dioxane and SnF(2). Chloride analogs of the Ge(IV) complexes were also isolated. All compounds were characterized in the solid state by single-crystal X-ray diffraction.

    Topics: Chemical Phenomena; Crystallography, X-Ray; Fluorides; Germanium; Magnetic Resonance Spectroscopy; Methane; Molecular Structure; Organometallic Compounds; Tin Compounds; X-Ray Diffraction

2012
Trapping the parent inorganic ethylenes H2SiGeH2 and H2SiSnH2 in the form of stable adducts at ambient temperature.
    Angewandte Chemie (International ed. in English), 2011, Aug-29, Volume: 50, Issue:36

    Topics: Coordination Complexes; Crystallography, X-Ray; Ethylenes; Germanium; Methane; Molecular Conformation; Silicon; Temperature

2011
The cycloadditions of various substituted carbenes, silylenes, and germylenes onto the diamond (100) surface: a theoretical exploration.
    The journal of physical chemistry. B, 2006, Jul-20, Volume: 110, Issue:28

    The cycloadditions of 21 singlet substituted carbenes, silylenes, and germylenes onto the diamond (100) surface have been theoretically studied by means of density functional theory coupled with effective cluster models. The calculated reaction energies and reaction pathways have disclosed that the substituents play an important effect on the reaction profiles for the additions of carbenes, silylenes, and germylenes onto the diamond (100) surface. Our theoretical investigations illustrate that, irrespective of carbenes, silylenes, and germylenes, the cycloadditions of those with electropositive substituents (such as H and CH(3)) onto diamond (100) are much more favorable than those with electronegative and pi-donating substituents (such as F and NH(2)) both thermodynamically and kinetically. In broad perspective, we believe that a similar reactivity trend can also be extended to that of Si (100), Ge (100), fullerene, single-walled carbon nanotube, disilenes, digermenes, silenes, and germenes because all of these materials feature an analogous bonding motif.

    Topics: Cyclization; Diamond; Germanium; Hydrocarbons; Methane; Models, Chemical; Silicon Compounds; Surface Properties

2006
Theoretical study on the reactivities of stannylene and plumbylene and the origin of their activation barriers.
    Chemistry (Weinheim an der Bergstrasse, Germany), 2004, Nov-19, Volume: 10, Issue:23

    The potential energy surfaces corresponding to the reactions of heavy carbenes with various molecules were investigated by employing computations at the B3LYP and CCSD(T) levels of theory. To understand the origin of barrier heights and reactivities, the model system (CH3)2X+Y (X=C, Si, Ge, Sn, and Pb; Y=CH4, SiH4, GeH4, CH3OH, C2H6, C2H4, and C2H2) was chosen for the present study. All reactions involve initial formation of a precursor complex, followed by a high-energy transition state, and then a final product. My theoretical investigations suggest that the heavier the X center, the larger the activation barrier, and the less exothermic (or the more endothermic) the chemical reaction. In particular, the computational results show that (CH3)2Sn does not insert readily into C-H, Si-H, C-H, Ge-H, or C-C bonds. It is also unreactive towards C=C bonds, but is reactive towards C identical with C and O-H bonds. My theoretical findings are in good agreement with experimental observations. Furthermore, a configuration mixing model based on the work of Pross and Shaik is used to rationalize the computational results. It is demonstrated that the singlet-triplet splitting of a heavy carbene (CH3)2X plays a decisive role in determining its chemical reactivity. The results obtained allow a number of predictions to be made.

    Topics: Computer Simulation; Free Radicals; Germanium; Hydrocarbons; Lead; Methane; Models, Chemical; Organometallic Compounds; Organotin Compounds; Silanes; Thermodynamics

2004