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Showing 1 to 7 of 7 for “"zinc dust"”.
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Syntheses of tetrasubstituted azo- and azoxybenzenes
… with (a) ethanolic sodium hydroxide and zinc dust, (b) methanolic sodium hydroxide and zinc dust, (c) ethnolic potassium hydroxide, and (d) lithium aluminim hybride. A second aim was the synthesis of new dihalodialkosy-, dimethoxydimethyl-, and tetra-alkoxy-azo- and azoxybenzenes. A …
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Abscheidung von Nickel und anderen Schwermetallen bei der Reinigung von Zinksulfatlösungen durch Zementieren mit Zinkstaub
The industrial production of zinc sulfate employs aqueous ZnSO4 solutions. These are made from leaching zinc-containing secondary materials with sulfuric acid, with the result that they are contaminated with considerable quantities of heavy metals. These metals are removed from the solution by the …
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The reaction of monochloromethyl ether with organometallic compounds
… ether with the magnesium cadmium and zinc derivatives of normal propyl and isopropyl halides were investigated. 2. In both the normal propyl and iso-propyl aeries, the yields of the expected condensation products RCH₂OCH₃ appeared in the order RMgX>R₂Zn>R₂Cd. 3. The primary …
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Zinc polysulfides as precursors to zinc sulfide and as group transfer reagents
In the first part of the thesis, reactions of zinc powder with solutions of elemental sulfur in various donor solvents are described. Complexes of the type $\rm ZnS\sb6$(N-donor)$\sb2$ are obtained for the ligands tetramethylethylenediamine (TMEDA), N-methylimidazole (MeIm), and …
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Radical methods for the synthesis of aliphatic amines
… with inexpensive and environmentally friendly zinc dust instead of the costly silane reducing agent. The use of a carboxylic acid derived nucleophile enabled a broader scope in both amine and nucleophile components and the full potential of this reaction is currently being developed. In chapter …
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The preparation of some unsymmetrical ortho substituted ̲o-dibenzoylbenzenes and 1,3-diphenylisobenzofurans
… and sulfuric acid, Reduction of these with zinc dust in acetic acid gave the corresponding 1,3-diarylisobenzofurans (III), 1-(2‘-methylpheny1)-3-phenylisobenzofuran (LV) and 1-2" -methoxyphenyl)-3-phenyl isobenzofuran (LVIII). Attempts were made to prepare 2'-chloro-2-benzylbenzophenone (I; …
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Low-temperature protonation studies of an electron-poor osmium methyl complex, and molecular precursors for the construction of graphene nanostructues with atomically precise edge structures
… with excess dfmpm in the presence of zinc dust in refluxing ethanol gave the piano stool osmium complex (C5Me5)Os(dfmpm)Br, which was converted to (C5Me5)Os(dfmpm)Me in excellent yield by treatment with excess ZnMe2 in refluxing toluene. The analogous ethyl complex (C5Me5)Os(dfmpm)Et …