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Showing 1 to 20 of 45 for “"Methyl Iodide"”.
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The use of methyl iodide as a high Z material in bubble chambers
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1957.
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KINETICS OF THE METHYL-IODIDE CATALYZED AND AUTOCATALYZED ARBUZOV REARRANGEMENT (METHOXYPHOSPHONIUM, CONDUCTIVITY, PHOSPHORUS NMR)
… The concentration of the methoxyphosphonium iodide intermediates was determined from calibration curves relating conductivity to concentration for the analogous stable ethylphosphonium iodides. No significant contribution from the autocatalytic Arbuzov rearrangement: (UNFORMATTED TABLE …
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The Interaction of Simple Gases with Hot Metal Filaments
The interaction of iodine, methyl bromide, methyl cyanide and methyl iodide with tantalum, tungsten, molybdenum and platinum filaments has been studied in a magnetron system. The interaction of two of these compounds, iodine and methyl iodide, with tantalum filaments has also been studied in an …
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Abiotic pathways of mercury methylation in the aquatic environment
… different oxidations states with several natural methyl-donors present in the aquatic environment. The importance of the abiotic pathway of mercury methylation was assessed by a thorough examination of the kinetics of these reactions in various experimental conditions, relevant to environmental …
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A Study of the Effects of Titanium Dioxide Nanoparticles on the Fluorescent Intensity of Fluorescent Compounds in the Presence of Known Quenchers.
… studied in the presence of molecular oxygen and methyl iodide. The rutile phase of titanium dioxide nanoparticles was synthesized by the acid hydrolysis of titanium isobutoxide at low temperatures with nitric acid. The crystalline powder was dissolved at different concentrations and used to …
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Synthesis and characterization of poly(proyleneimine)-based Rhodium(I) Metallodendrimers and their evaluation as Hydroformylation catalysts
… ligands and [RhCl(PPh3)3]. Methyl iodide was reacted with the mononuclear and multinuclear iminophosphine rhodium(I) complexes. Reactions of methyl iodide with the mononuclear iminophosphine rhodium(I) complex yielded a mixture of the oxidative addition and the acyl product, …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… were also conducted to assess the emission of methyl halides from crop plants. Methyl halide results from OP3 contradict current assumptions of a strong source from tropical vegetation. High mixing ratios of methyl chloride and chloroform were observed in the boundary layer over oil palm …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… were also conducted to assess the emission of methyl halides from crop plants. Methyl halide results from OP3 contradict current assumptions of a strong source from tropical vegetation. High mixing ratios of methyl chloride and chloroform were observed in the boundary layer over oil palm …
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The synthesis of 10-(4-hydroxymethylphenyl)-1,2-Benzanthracene
A. The alcohol, 10-(4’-hydroxymethylphenyl)-1,2-benzanthracene, was prepared by the reduction or 10-(4’-carboxyphenyl)- 1,2- benzanthracene. The structure or the alcohol was proven by: (1) Ultraviolet spectra (2) Infrared spectra (3) Elementary analysis (4) Preparation or the benzoate B. The …
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Preparation of N,N'-Dialkyl bis(diamino) diphenylmethanes and N,N'-Dialkyl bis(diamino) benzophenones: preparation of B-hydroxy sulfonamides and B-hydroxy sulfinamides
N,N'-Dimethyldiaminodiphenylmethanes and N,N'-dialkyldiaminobenzophenones were successfully prepared from the respective primary amines via alkylation of their methanesulfonamide derivatives. Initially N,N'-diaminodiphenylmethanes and N,N'-diaminobenzophenones were treated 0 with 2.2 equivalents of …
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Estudo fotodinâmicos por espectroscopia laser e radiação síncrotron: de pequenos hidrocarbonetos aos polímeros
… cross section, with results on: the methyl radical (CH3), the atomic iodine (2P3/2) and iodomethane or methyl iodide (CH3I). To achieve this, the combination of experiments based on synchrotron radiation and VUV laser with the use of pyrolysis to the molecular break. This procedure is …
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Growth and characterization of Ru films deposited by chemical vapor deposition : towards enhanced nucleation and film properties
… adsorption behavior of the Ru precursor, (2,4- dimethylpentadienyl)(ethylcyclopentadienyl)Ru or DER, on polycrystalline Ta, both with and without iodine adsorbed on the Ta. Based upon these results, CVD films were grown using DER/O₂, and it was shown that nucleation and film properties can be …
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The off-line and on-line analysis of liquid process streams by mass spectrometry
… model streams; acetone (analyte) in water and methyl iodide (analyte) in acetic acid.As an alternative strategy atmospheric pressure ionisation-mass spectrometers ionise samples in ion sources operating at atmospheric pressure. The techniques of electrospray ionisation and atmospheric pressure …
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The Synthesis of C-aryl-18-nor-steroids From Resin Acids and Their Derivatives.
… the diketone with formaldehyde and dimethylamine hydro-chloride, yielded the Mannich base, which with methyl-iodide formed the methiodide salt plus the vinyl-phenyl-ketone derivative.Cyclization of the vinyl product by means of a melt of aluminum chloride sodium chloride gave the …
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The directed ortho-lithiation of lithium phenylsulfide and lithium phenylselenide plus sigma-aromaticity and the hexakis(phenylseleno)benzene dication
… with $N$,$N$,$N\sp\prime$,$N\sp\prime$-tetramethylethylenediamine gives almost quantitative conversion to lithium 2-lithiobenzeneselenolate and is estimated to be seven to eight times faster than the directed ortho-lithiation of lithium phenylsulfide to form lithium 2-lithiobenzenethiolate. …
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The adsorption of sulfur and halogen containing materials on nickel studied by X-ray photoelectron spectroscopy and thermal desorption spectroscopy
The chemical adsorption and reaction of methyl fluoride, methyl chloride, methyl bromide, methyl iodide, methyl sulfide, dimethyl sulfide, dimethyl disulfide, and bis(trifluoromethyl) disulfide on clean, polycrystalline nickel surface (at 25°C) were investigated using an X-ray photoelectron …
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PART I: ALDOL REACTIONS OF 1,3-OXATHIOLAN-5-ONES. PART II: CAMPHOR AS A CHIRAL DIRECTING AGENT IN ALKYLATIONS OF GLYCINATES.
… which could be transformed into the 2-(methylthio)alcohols. Part II. Camphor imines of glycinates were prepared from camphorthione and alkylated with various alkylating agents differing in steric requirements and reactivity. Diastereomeric excesses for alkylation with simple alkyl …
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Application of Carbon Dioxide Waveguide Lasers to Infrared Saturation Spectroscopy
… between the hype fine components of a methyl iodide absorption have been observed . Precise measurements of phosphine absorption frequencies indicate that far - infrared lase r s may be pumped much further from resonance than has been assumed hitherto. Measurements on the allene …
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Fundamental Studies of Two Important Atmospheric Oxidants, Ozone and Hydroxyl Radical, Reacting with Model Organic Surfaces
… used to positively deflect molecular beams of methyl iodide and D₂O via the linear Stark effect. Future studies with the rotational state-selector will investigate the initial steps of •OH reactions with solid organic compounds.
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