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1Author    Stanislav Luňák, Marie Vašková, Josef Vepřek-ŠiškaRequires cookie*
 Title    Oxidation of Tetraline by Dioxygen. Effect of Fe(acac)3 on the Thermal and Photoinitiated Reactions  
 Abstract    The photochemical oxidation of tetraline by dioxygen is catalyzed by ferric acetylacetonate (iron(III) 2,4-pentadionate), the reaction rate increasing markedly with temperature. The rate-determining step of the photochemical oxidation is presumably a catalyzed thermal reaction. 
  Reference    Z. Naturforsch. 38b, 1293—1294 (1983); received June 23 1983 
  Published    1983 
  Keywords    Tetraline, Dioxygen, Oxidation, Photocatalysis 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1293_n.pdf 
 Identifier    ZNB-1983-38b-1293_n 
 Volume    38 
2Author    D. Ietm Ar Kuek, Andreas SchusterRequires cookie*
 Title    Oxidations of Alkylbenzenes with Dimethyldioxirane  
 Abstract    The oxidation o f various alkylbenzenes (1 -1 7) with excess dim ethyldioxirane (D M D O) in hom ogeneous acetone solutions has been studied. In general, the benzylic methylene and methine C -H bonds were oxidized to give the corresponding phenones and tertiary benzylic alcohols, respectively, in relatively low yields. W hereas a tert-buiy\ substituent at the reaction centre leads to very low conversion due to steric hindrance, the presence o f additional phenyl groups appears to favour the oxidation in most, but not all cases. Di-and triphenylmethane (4 and 14) were found to be considerably less reactive than cw-decalin. By contrast, the intra­ molecular competetive oxidation o f isobutylbenzene (19) and l-m ethyl-4-phenylcyclohexanes (20) reveals that the benzylic C -H bonds are slightly more reactive than the tertiary ones at remote positions. 
  Reference    Z. Naturforsch. 46b, 1223—1226 (1991); received April 4 1991 
  Published    1991 
  Keywords    D ioxiranes, Dimethyldioxirane, Alkylbenzenes, Oxidation 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1223.pdf 
 Identifier    ZNB-1991-46b-1223 
 Volume    46 
3Author    Wolfgang Malisch, Katharina Thirase, Joachim ReisingRequires cookie*
 Title    Ubergangsmetall-substituierte Phosphane  
 Abstract    , Arsane und Stibane, LX [1]. Ferrio-(thiocarbamoyl)phosphane Cp(OC)2Fe-P(Mes)[C(=S)-N(R)H] (R = Me, Et, f-Bu): Aufbau aus dem Ferrio-mesitylphosphan Cp(OC)2Fe-P(Mes)H und Organoisothiocyanaten sowie Quaternisierung mit Alkylhalogeniden und Oxidation mit Schwefel Transition Metal Substituted Phosphanes, Arsanes and Stibanes, LX [1]. Ferrio-(thiocarbamoyl)phosphanes Cp(OC)2Fe-P(Mes)[C(=S)-N(R)H] (R= Me, Et, r-Bu): Build-up from the Ferrio-mesitylphosphane Cp(OC)2Fe-P(Mes)H and Organoisothiocyanates, Quatemization with Alkyl Halides and Oxidation with Sulfur The ferrio-phosphane Cp(OC)2Fe-P(Mes)H (4), obtained by deprotonation of the me-sitylphosphane iron complex {Cp(OC)2 [H2(Mes)P]Fe}BF4 (3), reacts with the organoiso­ thiocyanates RNCS (R = Me, Et, Ph) (5a -c) to give the functionalized ferrio-phosphanes Cp(OC)2Fe-P(Mes)[C(=S)-N(R)H] (6a-c). Quatemization of 6a,b at the phosphorus atom with the alkyl halides R'-Hal (R1 = Me, Et, CH2 Ph) (7a-c) yields the complexes {Cp(OC)2Fe-P(Mes)(R')[C(=S)-N(H)(R)]}Hal (8a-d), whereas oxidation with elemental sulfur affords the ferrio-thiophosphoranes Cp(OC)2Fe-P(=S)(Mes)[C(=S)-N(R)H] (R = Me, Et) (10a,b). 10b is alkylated with Mel to give {Cp(OC)2Fe-P(SMe)(Mes)[C(=S)-N(Et)H]}I (11). The structure of 8b has been determined by X-ray analysis. 
  Reference    Z. Naturforsch. 53b, 1084—1091 (1998); eingegangen am 12. Mai 1998 
  Published    1998 
  Keywords    Metallo-Phosphanes, Insertion, Quatemization, Oxidation 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1084.pdf 
 Identifier    ZNB-1998-53b-1084 
 Volume    53 
4Author    Berthold Kersting, Michael DelionRequires cookie*
 Title    Synthesis of Benzisochalcogenol and -azole Derivatives via ortho Metalation of Isophthalamides  
 Abstract    The syntheses of benzofused isochalcogenazole derivatives via orf/?o-lithiation of isophtha­ lamides is reported. AUV'-Dialkyl-isophthalamides, C6H4-l,3-(CONHR)2, bearing R = /Pr or fBu substituents are readily ortho metalated by using 3.3 equiv. of «-BuLi/TMEDA. The organo lithium compounds react with S, Se, or Te to give 2-chalcogenol-isophthalamides, C 6 H v l,3 -(CONHR)2-2-XH (X = S, Se, Te). Oxidation of the chalcogenols affords dichalcogenides under acidic and benzisochalcogenazoles under basic conditions, respectively. The formation of the five-membered heterocycles proceeds by disproportionation of the dichalcogenides. Oxidation of the benzisothiazoles by hydrogen peroxide gives access to substituted sulfin-and sulfon­ amides. 
  Reference    Z. Naturforsch. 54b, 1042—1047 (1999); received June 1 1999 
  Published    1999 
  Keywords    Isophthalamides, Metalation, Chalcogen, Insertion, Oxidation 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1042.pdf 
 Identifier    ZNB-1999-54b-1042 
 Volume    54 
5Author    M. Rauh, H.-U Finzel, P. WißmannRequires cookie*
 Title    The Oxidation Kinetics of Thin Copper Films Studied by Resistivity Measurements  
 Abstract    Resistivity measurements on thin metal films allow to study the kinetics of oxidation. The method is applied to 50 -60 nm thick copper films deposited on glass substrates under UHV conditions. After annealing at 150 °C, the films are exposed to pure oxygen at various temperatures in the range 85 -135 °C, and the electrical resistivity is recorded in situ. At these temperatures, the oxygen begins to penetrate into the interior of the films, which results in a relatively steep increase in the film resistivity. A linear time law is valid to good approximation, which can be attributed to the influence of the dissociation of an adsorbed molecular species of oxygen on the reaction velocity. A potential diffusion of oxygen in the grain boundaries is also discussed. 
  Reference    Z. Naturforsch. 54a, 117—123 (1999); received July 29 1998 
  Published    1999 
  Keywords    Oxidation, Kinetics, Resistivity, Thin Metal Films 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0117.pdf 
 Identifier    ZNA-1999-54a-0117 
 Volume    54 
6Author    Requires cookie*
 Title    Übergangsmetall-Antimon(HI)bromide  
 Abstract    T ransition M etal-A n tim on y(III) Brom ides W o l f g a n g M a l i s c h und P e t e r P a n s t e r In stitu t Antim The reaction of SbBr3 with the complex metal carbonyl anions [jz-C5H 5(CO)3M]Na (M = Mo, W) leads to the formation of transition metal antimony bromides 7r-C5H 5(CO)3M -SbBr2, which can be further metallated, yielding the stable species jr-C5H 5(CO)3M -Sb-M / (CO)n7t-C5H 5 (M = M' = Mo, W) 
  Reference    (Z. Naturforsch. 30b, 229—234 [1975]; eingegangen am 16. Dezember 1974) 
  Published    1975 
  Keywords    ony-transition Metal Compounds, Synthesis, Coordination, Oxidation 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0229.pdf 
 Identifier    ZNB-1975-30b-0229 
 Volume    30 
7Author    S.Requires cookie*
 Title    Kinetics and Possible Mechanisms o f the Ce(IY) Oxidation of EDTA, CDTA, DTPA and NTA in Perchloric Acid Media  
 Abstract    a m ir B. H a n n a , W i l l i a m R . C a r r o l l , S a l e m A. A t t i g a , a n d W i l l i a m H . W e b b The rates of oxidation of four chelating agents with Ce(IV) in HC104 solutions, have been studied by the stopped-flow technique. The rates first increase with increasing acidity, reach maxima which are characteristic of the chelating agent and the medium, then progressively decrease with further increasing acid concentration. A t their maximum reactivities, the tendencies for oxidation decrease in the following order: 2rans-l,2-dia-minocyclohexane tetraacetic acid (CDTA) > ethylenedinitrilotetraacetic acid (EDTA) > diethylenetriaminepentaacetic acid (DTPA) > nitrilotriacetic acid (NTA). A mech­ anism for the oxidation of EDTA, involving Ce4+ and Ce(OH)3+ and both unprotonated and monoprotonated chelating agent, is proposed. 
  Reference    (Z. Naturforsch. 30b, 409—415 [1975]; received December 27 1974) 
  Published    1975 
  Keywords    Oxidation, Amino Acids, Kinetics, Mechanisms, Cerium(IY) 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0409.pdf 
 Identifier    ZNB-1975-30b-0409 
 Volume    30 
8Author    Joachim Staufif, Wolfgang JaeschkeRequires cookie*
 Title    Chemilumineszenz der S02-Oxidation Chemiluminescence of SO2-Oxidation  
 Abstract    The reactions of diluted aqueous solutions of SO2 resp. HSO3-ions with MJ1O4-or Ce 4+ ions in the pH range 1-4 produce chemiluminescence in the spectral region of 450-600 nm. Measurements of the time course of the light emission and their simulation on an analog computer led to a reaction scheme in which a recombination product of primarily formed HSO3 radicals -of a lifetime of about 1 second -appears as precursor of electronically excited SO2 molecules. The participation of singlet oxygen can be excluded because at least the reaction with Ce 4+ ions proceeds also in the absence of oxygen. 
  Reference    Z. Naturforsch. 33b, 293—299 (1978); eingegangen am 30. September/12. Dezember 1977 
  Published    1978 
  Keywords    Sulfur Dioxide, Oxidation, Chemiluminescence, Reaction Kinetics, Analysis 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0293.pdf 
 Identifier    ZNB-1978-33b-0293 
 Volume    33 
9Author    AdrianaL. Brachet-Cota, Gerardo BurtonRequires cookie*
 Title    Mercuric Oxide-Iodine Oxidation of 6/^-Hydroxypregnanes. Influence of the C-5 Functionality  
 Abstract    Oxidation of 6/3-hydroxyprogesterone and 3/3-acetoxy-5a,6/3-dihydroxypregnan-20-one with mercuric oxide-iodine under photolytic conditions rendered 4a-iodo-5/3,6/3-oxidopregnan-3,20-dione and 3/3-acetoxy-7-iodo-19-formyloxy-5,7-seco-6-norpregnan-5,20-dione respectively. 
  Reference    Z. Naturforsch. 43b, 491—495 (1988); received November 2 1987 
  Published    1988 
  Keywords    6/3-Hydroxypregnanes, Mercuric Oxide, Oxidation, /3-Fragmentation Hypoiodite Reaction 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0491.pdf 
 Identifier    ZNB-1988-43b-0491 
 Volume    43 
10Author    Dieter Sellmann+, MarcusH. Annakam, Falk Knoch, M. Atthias, MollRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, XCII*. Oxidation von Thiolat-Amin-zu Schiffbase-Eisen(II)  
 Abstract    Komplexen. Röntgenstrukturanalyse und Reaktivität von [Fe('N2S2')]2 (N2S2'2" = Glyoxal-bis(2 -mercaptoanil)(2 -)) Transition M etal Complexes with Sulfur Ligands, XCII*. Oxidation o f Thiolate Amine to Schiff Base Iron(II) Complexes. X-Ray Structure Analysis and Reactivity of [Fe('N2S2')]2 ('N 2S2'2_ = Glyoxal-bis(2-mercaptoanil)(2-)) Oxidation o f [Fe(CO)2('N 2H2S2')] (1) ('N 2H2S2'2_ = l,2-ethanediam ine-N ,N '-bis(2-benzene-thiolate)(2—)) gave insoluble [Fe('N2S2')]2 (2) ('N2S2'2_ = glyoxal-bis(2-m ercaptoanil)(2-)). Dinuclear, thiolato-bridged 2 was characterized by single crystal X-ray structure analysis. It does not react with CO or H 2, but yields bis or mono adducts with PR 3 (R = M e, rc-Bu, Cy). 
  Reference    Z. Naturforsch. 47b, 1545—1550 (1992); eingegangen am 17. April 1992 
  Published    1992 
  Keywords    Thiolate Am ine, Iron(II) Complexes, Oxidation, X-Ray 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1545.pdf 
 Identifier    ZNB-1992-47b-1545 
 Volume    47 
11Author    Jutta Knaudta, Stefan Försterb, Ulrich Bartsch3, Anton Riekerb, Ernst-G JägeraRequires cookie*
 Title    Catalytic Oxidation of a Trialkyl-Substituted Phenol and Aniline with Biomimetic Schiff Base Complexes  
 Abstract    The catalytic oxidation of 2,4.6-tri-f6rr-butylphenol and 2,4,6-tri-te/-r-butylaniline with mo­ lecular oxygen and rerf-butylhydroperoxide was investigated using biomimetic Mn-, Fe-and Co-complexes as catalysts. The catalytic activity and product distribution were determined and compared with those observed in the reactions of the well-known Co(salen) complex. 
  Reference    (Z. Naturforsch. 55b, 86—93 [2000]; received Septem ber 22 1999) 
  Published    2000 
  Keywords    Biomimetic Catalysts, Oxidation, Macrocycles, Manganese, Iron, Cobalt 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0086.pdf 
 Identifier    ZNB-2000-55b-0086 
 Volume    55 
12Author    Zu Sulfoxiden, Ralf Steudel, Fritz RoseRequires cookie*
 Title    von Schwefel-Stickstoff-Verbindungen Oxidation of Sulfur-Nitrogen Compounds to Sulfoxides by Peroxyacids  
 Abstract    Trifluoroperoxyacetic acid reacts in 80% yield with (S7N)2S to give colorless crystals of the known (SvN^SO, and with S7NH to give the formerly unknown unstable hepta-sulfurimide 3-oxide, S7NHO, the properties and vibrational spectra of which are reported. 
  Reference    (Z. Naturforsch. 33b, 122—123 [1978]; eingegangen am 7. November 1977) 
  Published    1978 
  Keywords    Sulfur-nitrogen Compounds, Oxidation, Trifluoroperoxyacetic Acid, Heptasulfur Imide, Thionyl Compounds 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0122_n.pdf 
 Identifier    ZNB-1978-33b-0122_n 
 Volume    33 
13Author    MajidM. Heravi, M. Aryam, M. AghayanRequires cookie*
 Title    Microwave-Assisted Oxidation of Alcohols Using Wet Alumina Supported Ammonium Chlorochromate in Solventless System  
 Abstract    A simple and selective m ethod for the oxidation of alcohols to carbonyl compounds is described that occurs on wet alumina supported ammonium chlorochromate under micro­ wave irradiation in solventless system. 
  Reference    Z. Naturforsch. 54b, 815 (1999); received D ecem ber 2 1998 
  Published    1999 
  Keywords    Oxidation, Alcohols, Carbonyl Compounds, Wet Alumina, Solventless System, Ammonium Chlorochromate 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0815.pdf 
 Identifier    ZNB-1999-54b-0815 
 Volume    54 
14Author    Wolfgang Stadlbauer, Thomas KappeRequires cookie*
 Title    Synthesen von 3-Hydroxy-tetrahydrochinolin-2.4-dionen Syntheses of 3-Hydroxy-tetrahydroquinoline-2,4-diones  
  Reference    Z. Naturforsch. 37b, 1196—1200 (1982); eingegangen am 19. April 1982 
  Published    1982 
  Keywords    3-Hydroxy-quinoline-2, 4-diones, 4-Hydroxy-2-quinolones, Oxidation, Photo-oxidation 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1196.pdf 
 Identifier    ZNB-1982-37b-1196 
 Volume    37 
15Author    Axel Fischer, Ion Neda, Thomas Kaukorat, Ralf Sonnenburg, PeterG. Jones, R.Einhard SchmutzlerRequires cookie*
 Title    Chemistry of the 4,5-Benzo-3-methyl-l,3,2-oxazaphosphorinan-6-one Ring System: X-Ray Crystal Structure Analysis of a Bis(2-chloroethyl)amino-and of an Acetam ido-Substituted Derivative  
  Reference    Z. Naturforsch. 49b, 939—949 (1994); eingegangen am 14. Februar 1994 
  Published    1994 
  Keywords    4, 5-Benzo-3-m ethyl-l, 3, 2-oxazaphosphorinan-6-one Derivatives, H alogen Substitution, Oxidation, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0939.pdf 
 Identifier    ZNB-1994-49b-0939 
 Volume    49