germanium mpounds cyclic

germanium mpounds cyclic

  • Germanium Compounds - an overview ScienceDirect Topics

    Germanium compounds containing dithiocarbonate 179 and dithiophosphate 180,181 ligands which have Ge–S bonds have been prepared and structurally characterized. Compounds containing germanium and other group 14 elements held together by chalcogenide bridges have been synthesized such as the heavy bicyclo[2.2.2]octane derivatives which contain germanium and silicon in the

  • Heterocyclic compound chemistry Britannica

    Heterocyclic compound, also called heterocycle, any of a major class of organic chemical compounds characterized by the fact that some or all of the atoms in their molecules are joined in rings containing at least one atom of an element other than carbon (C). The cyclic part (from Greek kyklos, meaning “circle”) of heterocyclic indicates that at least one ring structure is present in such ...

  • Germanium compounds and their use as a biocompatible oil ...

    Germanium compounds and their use as a biocompatible oil. Cite. Download. Share. Tweet. Email. Patent: US5391792: This web page summarizes information in PubChem about patent US5391792. This includes chemicals mentioned, as reported by PubChem contributors, as well as other content, such as title, abstract, and International Patent ...

  • Applications of Germanium Compounds

    Germanium compounds have emerged as critically important materials in the fabrication of microelectronics, ... Repeating silicon-oxygen bonds tend to form extended linear polymers in preference to cyclic structures. Repeating germanium-oxygen bonds tend to form cyclic structures in preference to extended linear polymers.

  • Germanium - an overview ScienceDirect Topics

    Compounds containing germanium and other group 14 elements held together by chalcogenide bridges have been synthesized such as the heavy bicyclo[2.2.2]octane derivatives which contain germanium and silicon in the skeleton 182,183 (Equation (138)). 183 Reaction of the Ge Sn doubly bonded species 77 with propylene sulfide leads to the formation ...

  • CYCLIC GERMANIUM COMPOUNDS AND APPLICATIONS THEREOF

    Jul 25, 2019  The present disclosure provides several new classes of luminescent compounds containing a cyclic germanium core. Specifically, the compounds are separated into four groups: (I) germoles, (II) germafluorenes, (III) germa-rhodamines or germa-fluoresceins, and (IV) germapins with the following respective formulas

  • Heterocyclic compound - Rings with uncommon heteroatoms ...

    Heterocyclic compound - Heterocyclic compound - Rings with uncommon heteroatoms: In addition to the nitrogen, oxygen, and sulfur atoms commonly found in heterocycles, a large number of other elements form such rings—of greater or lesser stability. Such compounds are as yet of little practical importance. Some of the main classes are described below according to the elements they contain.

  • News about four-membered rings in the chemistry of ...

    Request PDF News about four-membered rings in the chemistry of organosilicon, -germanium, and -tin compounds The synthesis of the cyclic tin-modified silanes 1–6 are described by the ...

  • Synthetic, Physical, and Photolytic Properties of Linear ...

    The following dissertation focuses on the synthesis and characterization of unique linear, branched, cyclic germanium compounds to further the knowledge and scope of organometallic chemistry of the element. In chapter II a 2-germanium atom end capping reagent was used for synthesis of longer linear oligomer using monohydride Ph3GeGePh2H. This species was observed to be thermally unstable

  • Hypervalence in germanium compounds containing the ...

    Hypervalence in germanium compounds containing the tetracylic moiety {S(C 6H 3S) 2O}Ge via OGe transannular interactions: A structural study Article in Polyhedron 28(4):782-788 March 2009 ...

  • Metalloid compounds as drugs - ncbi.nlm.nih.gov

    Metalloid compounds generate various biological effects on cells and tissues and their therapeutic and potential uses have been evolving over centuries, starting, for example, with the empiric use of arsenic in ancient times up to the current Food and Drug Administration approval of As 2 O 3 for the treatment of acute promyelocytic leukemia in human. . However, opportunities remain unrealised ...

  • Analysis of Germanium Hydride Molecular Clusters

    Germanium in hydrides was revealed to be not only four-coordinated but to sometimes form only two bonds in linear chain or cyclic structures. The planar digermene H 2 Ge = GeH 2 form is the transition state in the interconversion of the germylgermylene H 3 Ge–GeH structure, which was found to correspond to minimum enthalpy [ 5 ].

  • Acyclic Germylones: Congeners of Allenes with a Central ...

    Compounds 1 and 2 are the first acyclic germylones containing each one germanium atom and two cAAC: molecules. EPR measurements on compounds 1 and 2 confirmed the singlet spin ground state. DFT calculations on 1 / 2 revealed that the singlet ground state is more stable by ∼16 to 18 kcal mol –1 than that of the triplet state.

  • Synthesis and properties of cyclic ethynyl compounds of ...

    Five new ethynyl compounds of silicon and germanium were synthesized and subjected to thermal dehydropolycondensation. ... Synthesis and properties of cyclic ethynyl compounds of silicon and germanium ... N.A., Gavrilova, O.N. Sladkov, A.M. Synthesis and properties of cyclic ethynyl compounds of silicon and germanium. Russ Chem Bull 27, 1898 ...

  • Heterocyclic compound - Wikipedia

    A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). Heterocyclic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of these heterocycles.. Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose ...

  • A Cyclic Germadicarbene (“Germylone”) from Germyliumylidene

    Mar 21, 2013  By employing the chelate dicarbene 1, the new chlorogermyliumylidene complex 2 could be synthesized and isolated in 95% yield. Dechlorination of 2 with sodium naphthalenide furnishes the unique cyclic germadicarbene 3 which could be isolated in 45% yield. Compound 3 is the first isolable Ge(0) complex with a single germanium atom stabilized by a dicarbene.

  • "Synthesis and Characterization of Luminescent Cyclic ...

    Synthesis and Characterization of Luminescent Cyclic Germanium Compounds. Teresa Lynn Bandrowsky, University of Missouri-St. Louis. Abstract. The vision in the field of organic electronics is the realization of flexible, easily manufactured, low cost optoelectronics for use in organic light emitting diodes (OLEDs) for large area displays and lighting applications, organic photovoltaic cells ...

  • Stable N‐Heterocyclic Carbene Complexes of Hypermetallyl ...

    Apr 28, 2011  Stable N‐Heterocyclic Carbene Complexes of Hypermetallyl Germanium ... , Modern Techniques in Synthesis of Organometallic Compounds of Germanium ... (IV)-Fluorides with Cyclic and Acyclic Carbenes: Bis(dialkylamino)-difluoromethylenes as Carbene Sources, Inorganic Chemistry, 10.1021/ic202008m, 51, 2, (763-765), (2012).

  • 2,2-DIMETHOXY-1,6-DIAZA-2-SILACYCLOOCTANE Gelest, Inc.

    Cyclic azasilanes react rapidly, less than one minute, with any and all surface hydroxyl groups is therefore of unique interest for surface modification. Volatile cyclic azasilanes afford high functional density monolayers on inorganic surfaces such as nanoparticles and other nanofeatured substrates without a hydrolysis step or the formation of ...

  • Binary compounds of silicon - Wikipedia

    Binary compounds of silicon are binary chemical compounds containing silicon and one other chemical element. Technically the term silicide is reserved for any compounds containing silicon bonded to a more electropositive element. Binary silicon compounds can be grouped into several classes. Saltlike silicides are formed with the electropositive s-block metals.

  • Analysis of Germanium Hydride Molecular Clusters

    Germanium in hydrides was revealed to be not only four-coordinated but to sometimes form only two bonds in linear chain or cyclic structures. The planar digermene H 2 Ge = GeH 2 form is the transition state in the interconversion of the germylgermylene H 3 Ge–GeH structure, which was found to correspond to minimum enthalpy [ 5 ].

  • Stable N‐Heterocyclic Carbene Complexes of Hypermetallyl ...

    Apr 28, 2011  A selective route: Hypermetallyl germanium(II) and tin(II) compounds (see scheme) were prepared using dimetallyl magnesium reagents and were fully characterized.These derivatives, which contain good leaving substituents, might be suitable candidates for

  • Germanium(II) Dications Stabilized by Azamacrocycles and ...

    Germanium(II) Dications Stabilized by Azamacrocycles and Crown Ethers Article in Angewandte Chemie International Edition 48(28):5152-4 July 2009 with 14 Reads How we measure 'reads'

  • Synthesis and Characterization of Cyclic Silicon Compounds ...

    We found that the reactions of empty fullerenes with reactive silicon and germanium compounds afforded the corresponding fullerene derivatives [20][21][22][23][24][25][26][27][28][29][30] [31] [32 ...

  • Heterocyclic compound - Wikipedia

    A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). Heterocyclic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of these heterocycles.. Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose ...

  • Ge Organogermanium Compounds SpringerLink

    The present volume opens the Gmelin series on organogermanium compounds, that is, those compounds containing at least one germanium-to-carbon bond. This whole series is being coordinated by Professor ... Ge Organogermanium Compounds Part 1 GeR4 Compounds and Ge(CH3)3R Compounds up to Cyclic Alkyl Groups. ... Mendeleeff's predictions of the ...

  • Janet Braddock-Wilking - University of Missouri–St. Louis

    Dr. Braddock-Wilking’s research focuses on the synthesis, characterization, and reactivity of compounds containing heavier Group 14 elements (E = Si, Ge). ... ″Cyclic germanium compounds and applications thereof″, J. Braddock-Wilking, T. L. Bandrowsky and J. B. Carroll II, PCT Int. Appl.

  • Hypervalence in germanium compounds containing the ...

    Hypervalence in germanium compounds containing the tetracylic moiety {S(C 6H 3S) 2O}Ge via OGe transannular interactions: A structural study Article in Polyhedron 28(4):782-788 March 2009 ...

  • Basic Silicone Chemistry – A Review

    cyclomethicone compounds (n is 3-6) are volatile compounds used in applications like antiperspirants and as cleaning solvents for electronic parts like circuit boards. It is important to realize that all cyclomethicone compounds are not volatile (for example n=30), and likewise all volatile silicones are not cyclic (for example MM).

  • GERMANIUM DICHLORIDE-DIOXANE COMPLEX Gelest, Inc.

    All structures are computer generated. Please rely on the product data below for placing your order. If you see any errors in structures, please email customer service so that they can be addressed.

  • Thermal Reactions of Fullerenes with Cyclic ... - DeepDyve

    Nov 01, 2014  Read "Thermal Reactions of Fullerenes with Cyclic Organosilicon and Organogermanium Compounds: Silylation and Germylation of C60 and C70, Heteroatom Chemistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Germanium compounds and their use as a biocompatible oil ...

    Feb 21, 1995  The present invention is a germanium compound having the following general formula I: ##STR1## in which n is a positive integer less than 50 when the general formula is linear and is between 3 and 50 when the general formula is cyclic, and preferably between 3 and 6, and the R radicals, which are identical or different, are chosen independently from hydrocarbyl radicals, or, the R radicals ...

  • Cyclic Disilylated and Digermylated Germylenes Request PDF

    Cyclic Disilylated and Digermylated Germylenes. ... 2.428(3) Å) was not as pronounced as was observed before for related cyclic and acyclic compounds ... Oxidation of divalent germanium compounds ...