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Showing 1 to 20 of 40 for “"Liquid ammonia"”.
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The dielectric constant of liquid ammonia
Thesis (M.A.)--University of Kansas, Chemistry, 1917. ; Includes bibliographical references.
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The reducing action of different metals in liquid ammonia
… of different metals on an organic compound in liquid ammonia is reported for the first time.
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The reduction of organic compounds of sulfur by metals in liquid ammonia
… organic sulfur compounds by different metals in liquid ammonia is reported for the first time. 2. A metal with a high half-cell potential favors a greater extent of reduction than a lower potential metal. 3. The greater the concentration of ammonium ion as a proton donor, the greater will be the …
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The design of a high pressure solvent extraction process using liquid ammonia as solvent
The literature on the potential use of liquid ammonia as a solvent for the extraction of aromatic hydrocarbons from mixtures with paraffins, and the application of reflux, has been reviewed. Reference is made to extractors suited to this application. A pilot scale extraction plant was designed …
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Some halogen derivatives of aniline and the determination of chlorine and bromine in some organic compounds by the use of liquid ammonia
Thesis (M.A.)--University of Kansas, Chemistry, 1916. ; Includes bibliographical references.
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Birch reduction of benzamide, m-methoxy-benzamide and terephthalic acid
… procedure (27), with lithium and ethanol in liquid ammonia at dry-ice temperature and where ethanol was added slowly after lithium addition, benzamide was reduced to 1,4-dihydrobenzamide., (b) By using Kuehne and Lambert’s method (20), with sodium and ethanol in liquid ammonia at dry-ice …
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The formation and chemistry of certain heterocyclic dianions
… two molecular equivalents of sodium amide in liquid ammonia. The dianion underwent C-alkylation with numerous alkyl halides, to form 2-alkylglutarimides. Certain of these 2-alkyl derivatives were hydrolyzed to the corresponding 2-alkylglutaric acids. Carbonyl addition reactions of the …
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An investigation of direct C-alkylation of 2,4-oxazolidinedione and 5-phenyl-2,4-oxazolidinedione utilizing dialkali salt intermediates
… using 2.1 equivalents of lithium amide in liquid ammonia followed by alkylation with 1.1 equivalents of benzyl chloride. Although the yield of 5-benzyl-5-phenyl-2,4-oxazolidinedione using lithium diisopropylamide in THF-hexane-HMPA was only 39% (determined by pmr analysis), the addition of …
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Birch reduction of cinnamic acid
… and alkaline earth metals as reducing agents in liquid ammonia solvent for aromatic and conjugated systems has been investigated by chemists at least since the early 1900's, e.g., Lebau and Picon (1). By subsequent additions of a proton source, the system yielded the first successful partial …
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Reactions of 4-chloro-2,6-dimethoxypyrimidine and 2-chlorothiazole with carbanion nucleophiles
… generated by means of potassium amide in 1 liquid ammonia were found to proceed by the S<sub>RN>1 mechanism upon photostimulation with near-UV light to give good yields of substitution products resulting from displacement of chloride ion. Both photostimulated and dark reactions of …
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Investigation of cellulose xanthate
… to synthesize cellulose xanthate in anhydrous liquid ammonia, and to analyze the product for combined sodium and sulphur, with the hope of determining the exact chemical composition of each C₆ unit of cellulose xanthate. It is the purpose of this work to study the xanthation of cellulose with …
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Birch reduction of benzenesulfonamide and benzenephosphonic acid
<p>The use of an alkalai metal dissolved in liquid ammonia and a proton source such as alcohol to affect partial reduction of aromatic compounds, commonly known as the BIrch reduction, has proven to be a synthetic procedure of great utility. (1) The flexibility and usefulness of this reaction has …
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Improvement of Homogeneity and Adhesion of Diamond-Like Carbon Films on Copper Substrates
… phase on copper substrates using acetylene in liquid ammonia via electrodeposition route. An electrochemical method is proposed for boron doping into DLC films.
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Investigation of Structure and Properties of Low Temperature Deposited Diamond-Like Carbon Films
… an anodic oxidation cyclization of acetylene in liquid ammonia. Successfully anodic deposition was carried out for DLC onto nickel substrate at temperatures below -40°C. Comparative studies were performed on a series of different carbon sources (acetylene, sodium acetylide, and a mixture of …
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Polarography of mercury in aliphatic diamines
… a cryostat needed for use in polarography in liquid ammonia (the original problem) was found broken. For experience it was decided to turn to another form of nonaqueous polarography while the parts were on order. Materials remaining from a previous diamine investigation by Foss (21) were found …
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