Molecular structures
Molecular geometry - the general shape of a molecule or the arrangement of atoms in three dimensional space. Physical and chemical properties of an atom. Main examples of predicting molecular geometry. The valence shell electron and her repulsion.
Подобные документы
Quantum-chemical calculation of thermodynamic features dye. Spatial structure of the colouring agent "active bright orange CS/5K" molecule. Kinetics process of wastewater treatment from the dye. Mechanism of wastewater treatment from active bright orange.
статья, добавлен 30.08.2016Rubidium as a chemical element and a soft, silvery-white metallic element of the alkali metal group. Characteristics, history, occurrence rubidium. Isotopes, uses and applications. Compounds, rubidium chloride. Precautions and biological effects.
реферат, добавлен 13.11.2009Plastic additives as a wide range of chemicals used by resin manufacturers, compounds and manufacturers to improve the properties, processing and characteristics of polymers. Features of their chemical composition and conditions of effective use.
статья, добавлен 10.03.2019The chemical structure of the polymer latexes. The influence of surfactants on the drip solution. The mechanism of anionic with a negative charge in the screed, acting as air entrainment. Hydrogen bonding, water absorption and compressive strength.
статья, добавлен 22.02.2015The study of physico-chemical properties of modified forms of natural biopolymers – carboxymethyl cellulose and xanthan gums, their ability to film formation water-soluble polymeric compositions and the influence on growth and productivity of crops.
статья, добавлен 23.02.2016Magnesium as a chemical element and a silvery-white, light-weight metal. Notable characteristics, applications. As the metal. Incendiary use, in magnesium compounds. History, sources, ores, sea water, electrolysis. Biological role, isotopes, precautions.
реферат, добавлен 13.11.2009Research transparent conducting n-type semiconductor zinc oxide films, which have been extensively studied in recent year because they exhibit wide band gap. Analysis of scanning electron microscopy which used for study of surface morphological changes.
статья, добавлен 30.07.2016Combination of methods quantum chemistry. Geometrical and electronic structure of clinoptilolite clusters modified by zinc and calcium. Redistribution of electronic density on the oxygen atoms of clusters during formation of bonds with zinc and calcium.
статья, добавлен 23.02.2016By Reaction with Alkyl Halides. Nucleophilic Addition. Oxidation of Ring Carbon Atoms Followed by Addition. Reduction of Exocyclic Double Bonds. Ring Cleavage Reactions. Coupling of Pyrazol-3-ones with Aryl Diazonium Salts. Oxidative Coupling, silylation.
учебное пособие, добавлен 05.03.2013Physico-chemical characteristics of I-40 and MS-20 commercial mineral oils. The use of such oils for the lubrication of molds in the manufacture of glass containers. The study of the thermal stability of oils and their fractions of hydrocarbons.
статья, добавлен 23.02.2016The novel approach to chemical design of carbon-coated Al2O3 nanoparticles with an average particle size of 8-10 nm was developed. Carbon coating was synthesised by modification of fumed alumina support with 4,4-methylenebis and its subsequent pyrolysis.
автореферат, добавлен 02.04.2014Investigation of optical absorption spectra of YAG: Cr, Mg, and GGG: Cr, Mg films during high-temperature annealing in oxidation and reduction atmospheres. Factors to increase in absorption in the visible region, the charge exchange of chromium ions.
статья, добавлен 29.09.2016Study the chemical modification polyglycidyl phenolformaldehyde oligomers by methacrylic acid using a catalyst benzyltriethylammonium chloride. The influence of time, temperature on the rate of reaction between compounds. A structuring chemical mixtures.
статья, добавлен 23.02.2016Study films of CdxZn1-xTe solid solution, obtained by a close-spaced vacuum sublimation technique under different temperatures of glass substrate by energy dispersive analysis of X-rays, scanning electron microscopy and X-ray diffraction methods.
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статья, добавлен 27.07.2016Composition features of the kinetics of enthalpy losses H(t), caused by physical aging in chalcogenide glasses, subject to the structural model of chain rearrangement. Mechanism of natural physical aging, specificity of structural-topological complexes.
статья, добавлен 29.09.2016Established based on the theory of nuclear interactions and data on the binding energy of nucleons for the set of known nuclides. Familiarization with fragment of the periodic table of chemical elements. Characteristic of parameters of the metric tensor.
статья, добавлен 29.04.2017- 95. Growth of zinc oxide porous films via electrochemical anodization using glycerol based electrolyte
Formation of the porous structure of zinc oxide. Morphological properties of anodized films. Methods of diffraction of X-rays and scanning electron microscopy. Analysis of electrochemical anodizing of zinc oxide in electrolyte based on glycerol.
статья, добавлен 30.08.2016 - 96. Ti-Al alloy
A new process for developing titanium aluminides using chemical vapor synthesis was investigated in a laboratory experiment. Aluminum subchloride was used as the reducing agent in the reaction with TiCl4 and the source of aluminum for Ti-Al alloy.
лабораторная работа, добавлен 01.11.2019 Brief biographical information about the life of F. Haber - a German chemist and Nobel laureate. Investigation the reaction of nitrogen with hydrogen, which produces ammonia. The essence of Le Chatelier's Principle. The main function of the catalyst.
реферат, добавлен 04.02.2015Chemical derivatives of 1,2,4-thiazole as biologically active chemicals intended for the protection of plants for agricultural purposes, such as biocides and fungicides when preserving books. Impact of chemicals on humans, animals and the environment.
статья, добавлен 21.07.2018The technology for the synthesis of two coumarin-chalcone hybrids by means of Kleisen-Schmidt condensation between 3-acetylcoumarin with benzaldehyde and 4-chlorobenzaldehyde, respectively. Method of identification and control of a chemical process.
статья, добавлен 15.01.2021Platinum as a chemical element, six it naturally occurring isotopes. History of the discovery of this metal. Use as precious metal. Industrial applicability alloys containing platinum in catalytic converters, laboratory equipment, dentistry equipment.
презентация, добавлен 27.10.2014