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Showing 1 to 20 of 59 for “"Methylene chloride"”.
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Hydrothermal chemistry of methylene chloride and MTBE : experimental kinetics and reaction pathways
… and associated rates is essential. The rates of methylene chloride and methyl tert-butyl ether (MTBE) hydrolysis in sub- and supercritical water have been measured experimentally at 250 bar over a range of temperatures from 100 to 600°C. The rate constants for both compounds showed a local …
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Oxidation chemistry and kinetics of model compounds in supercritical water : glucose, acetic acid, and methylene chloride
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1993.
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Experimental and modeling studies of formation of products of incomplete combustion and chlorocarbon incineration
… of incomplete combustion. For this purpose methylene chloride was used as a chlorine-containing compound. The propose of this research was to obtain a better understanding of the incineration process of chlorocarbons, such as methylene chloride, especially regarding its destruction …
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Effect of intermediate solvents on poly(ether ether ketone)
… ether ketone) (PEEK) and three solvents (i.e., methylene chloride, tetrahydrofuran, and acetone) was studied by means of several complementary techniques. A series of eleven 0.3 mm thick PEEK films was produced. Each film had a certain crystallinity index and crystal morphology, as revealed by …
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NMR study of palladium methoxide and palladium carbomethoxide complexes
… observed at the aromatic region. In deuterated methylene chloride, the precursors and lithium methoxide show similar results. The reaction with LiOCH3 proceeds smoothly in methanol, however it appears to be in equilibrium. In a mixed solvent system, such as methanol/chloroform or methylene …
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The directed ortho-lithiation of lithium phenylsulfide and lithium phenylselenide plus sigma-aromaticity and the hexakis(phenylseleno)benzene dication
… (D$\sb2$O, carbon dioxide, selenium, methylene chloride, methyl iodide, thioxanthone, and dimethylcarbonate) form ortho-substituted products. The treatment of dilithium benzene-1,2-diselenolate with methylene chloride and 1,2-dibromoethane forms 1,3-benzodiselenole (70.4% yield) and …
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Thermodynamic Studies of Metal Carboxylates
… rhodium(II) butyrate were studied in benzene and methylene chloride solutions. Electrochemical studies of these adducts were carried out in methylene chloride solutions. The thermodynamic data clearly demonstrates substantial changes in the acidic and redox properties of the second metal as a …
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Reactions of centralite in aged propellants
… the aims of the present work was to analyse the methylene chloride extracts from thermally aged double- and triple-base propellants containing centralite, as well as the nitrocellulose and pierite residues from the latter, by means of two-dimensional thin-layer chromatography and electronic …
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Characterization of cellulose esters via GPC/FT-IR
… acetate butyrates in THF, acetonitrile, and methylene chloride were also characterized. Separate absorptions for the acetyl and butyryl C-O-C asymmetric stretch were observed at 1235 cm⁻¹ and 1176 cm⁻¹ respectively. In acetonitrile and methylene chloride the carbonyl asymmetric stretching …
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Spectroscopic and theoretical studies of small molecules.
… two contrasting molecules - ketene (H2CCO) and methylene chloride (CH2CI2). High resolution (~0.05cm-1) infrared studies of ketene were carried out and complete analyses performed to the A1 species vibrations v1-v4, allowing the determination of revised vibrational frequencies and rotational …
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Polymer dynamics in bulk, adsorbed and solution by NMR methods
… of solvents in binary solvent mixtures of methylene chloride/toluene and chloroform/acetonitrile in poly(methyl methacrylate) solutions as functions of concentration are also reported"--Introduction, page 1.
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Synthesis of 2(3H)-furanones via electrophilic cyclization
… electrophile at room temperature using either methylene chloride or acetonitrile as the solvent. Successful electrophiles in this process include I2, ICl, and PhSeCl. The iodine functionality introduced into the heterocycle facilitates further elaboration by Pd-catalyzed chemistry.</p>
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A Study of the Effect of the Extraction Procedure in the Analysis of Organic Compounds Adsorbed on Coal Ash
… analysis. The solvent of choice appears to be methylene chloride. A slow heating rate appears to give better results as compared to one in which the components elute out in a short time.
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Oxidative additions of amides to an iridium(I) metal center
… hydride arranged cis to nitrogen and trans to chloride. Acetamide will add to form the complex mer-(MeC(O)HN)IrH(PMe3)3CI which is isolable as a sticky yellow solid and soluble in all common solvents. The reaction with benzamide in toluene at 80°C produces the complex mer( PhC(O)HN)IrH(PMe3)3CI …
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Surface analysis of sheet molded composite (SMC) material as related to adhesion
… done with a Scotch Brite abrasive pad soaked in methylene chloride and after washing the SMC surfaces with hot aqueous chemicals at high pressures.
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Electrochemical facilitated transport: a study in synthesis, simulation and experimentation
… the movement of silver perchlorate and thallium chloride across methylene chloride bulk liquid membranes using 2,5,8,11,14,17,20-heptaoxa[21](1,1’)ferrocenophane-1,21-dione as the membrane carrier. As a further enhancement to the understanding of the process of electrochemical facilitated …
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Cysteine(2-), alkyl, and siloxide complexes of ruthenium(VI) and iron(III)
… of two equivalents of N-aceteyl-L-cysteine to methylene chloride solutions of either (NBu$\sb4$) (Fe$\sp{\rm III}$(OSiMe$\sb3)\sb4$) or (NBu$\sb4\rbrack\sb2$(Fe$\sp{\rm II}$(OSiMe$\sb3)\sb4$) and are described in Chapter 3. The synthesis and characterization of the first monooxo ruthenium(VI) …
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Stereoisomerization of Hexacoordinate Sulfur and Tellurium
… in free energy than the all trans isomer in methylene chloride solution at 25(DEGREES)C. Calorimetry showed the trans-to-cis isomerization to be exothermic by 1.6 (+OR-) 0.5 kcal/mol. The rapid, acid-catalyzed isomerization of trans isomer 2 to give cis isomer 3 occurs by a dissociative …
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The evaluation and comparison of the extraction procedure toxicity test and the toxicity characteristic leaching procedure for the analysis of municipal wastewater sludges
… and concentrate the organic chemicals into methylene chloride; this methylene chloride extract was then subjected to GC and GC/MS for quantitative analysis and qualitative identification of targeted and nontargeted organic chemicals. In order to assess recovery and extractability …
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I. Solution Photochemistry of Camphor II. Synthesis and Solution Photochemistry of 2, 2-Dimethylcyclobutanone
… Irradiation of 2,2-dimethylcyclobutanone in methylene chloride or in pentane produced little or no 2,3-dihydro-2,2-dimethylfuran. This observation is contrasted with the results of our study of camphor photochemistry.</p>
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