| | 1 | Author
| Börries Kübel, Werner Knauf, Anna Waltersdorfer | Requires cookie* | | | Title
| Synthese von 1.2.4-Oxadiazolyl-und 1.2.4-Thiadiazolylvinylphosphaten und deren biologische Wirkung Synthesis of 1,2,4-Oxadiazolyl-and 1,2,4-Thiadiazolyl vinylphosphates and their Biological Activity  | | | |
Reference
| Z. Naturforsch. 37b, 896—901 (1982); eingegangen am 21. Dezember 1981/29. Januar 1982 | | | |
Published
| 1982 | | | |
Keywords
| 1, 2, 4-Oxadiazole, 1, 2, 4-Tliiadiazole, Vinylphosphates, Insecticide, Acaricide | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0896.pdf | | | | Identifier
| ZNB-1982-37b-0896 | | | | Volume
| 37 | |
| 2 | Author
| Hubert Schmidbaur, Thomas Costa | Requires cookie* | | | Title
| Synthese eines Doppel-Carbodiphosphorans und seiner Vorstufen Synthesis of a Double-Carbodiphosphorane and its Precursors | | | | Abstract
| The reaction of 1,4-dibromobutane with bis(diphenylphospliino)methane (1) yields two products, one of which is identified as butane-l,4-bis[diphenyl(diphenylphosphinomethyl)-phosphonium bromide] (3 a). Transylidation of this bis-phosphonium salt using two equiv-alents of (CH3)3P = CH2 affords the bis-ylide [CH2CH2P(C6H5)2 = CH-P(C6H5)2]2 (4) in high yields. This conversion can be reversed on treatment of 4 with etheral HCl (to give 3b). Methylation of 4 with CH3I occurs at phosphorus, however, and produces the bis-semiylide salt (5), [CH2CH2P(C6H5)2CHP(C6H5)2CH3]2 2e 2Iö. Transylidation of 5 (again with (CH3)3P = CH2) leads to the bis-carbodiphosphorane (6), [CH2CH2P(C6H5)2 = C = P(C6H5)2CH3]2. All compounds were characterized by elemental and detailed NMR analyses. The second product of the above quaternisation reaction is a cyclic bis-phosphonium salt (2) with a seven-membered ring structure. | | | |
Reference
| Z. Naturforsch. 37b, 677—79 (1982); eingegangen am 9. Februar 1982 | | | |
Published
| 1982 | | | |
Keywords
| 1, 4-Dibromobutane, Transylidation, Carbodiphosphorane, Bis-carbodiphosphorane, Ylides | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0677.pdf | | | | Identifier
| ZNB-1982-37b-0677 | | | | Volume
| 37 | |
| 3 | Author
| Elli Theodoridou, Pantelis Karabinas, Dimitrios Jannakoudakis | Requires cookie* | | | Title
| Elektrochemisches Verhalten der Nitrophenole und ihrer Reduktionsprodukte an Graphitelektroden, II Mechanismus und Kinetik Electrochemical Behavior of the Nitrophenols and their Reduction Products at Graphite Electrodes, II Mechanism and Kinetic | | | | Abstract
| The mechanism of the electrochemical reactions of l-nitro-2-naphthol, o-nitrophenol and p-nitrophenol at carbon fibre electrodes is investigated in aqueous solutions with pH= 1-10. The above nitrophenols are reduced to the corresponding amines, which are reoxidized to quinone imines. As the quinone imines are partially hydrolysed to quinones, the kinetic of this hydrolysis reaction is also examined. In the case of l-nitro-2-naphthol the hydrolysis rate constant of 1,2-naphthoquinone imine is estimated as a function of pH by cyclic voltammetry. | | | |
Reference
| (Z. Naturforsch. 37b, 97—101 [1982]; eingegangen am 14. September 1981) | | | |
Published
| 1982 | | | |
Keywords
| Cyclic Voltammetry, Graphite Electrodes, o-Nitrophenol, 1, 2-Naphthoquinoneimine | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0097.pdf | | | | Identifier
| ZNB-1982-37b-0097 | | | | Volume
| 37 | |
| 4 | Author
| Cornelia Lensch, Oskar Glemser | Requires cookie* | | | Title
| Darstellung und Reaktionen von S.N-Bi8(heptafluorisopropyl)schwefelfluoridimid Preparation and Reactions of S,N-Bis(heptafluoroisopropyl)sulphurfluoride Imide | | | |
Reference
| Z. Naturforsch. 37b, 401—403 (1982); eingegangen am 8. Dezember 1981 | | | |
Published
| 1982 | | | |
Keywords
| Sulphur-amide, N-hexafluoroisopropyl, S -[2 -chlorine-1, 1, 1, 3, 3, 3 -hexafluoro]isopropyl, Sulphurfluoride-imide, N-heptafluoroisopropyl, S-[2-chlorine-l, l, l, 3, 3, 3-hexafluoro]isopropyl, Sulphur-imide, N-heptafluoroisopropyl, S-dimethoxy | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0401.pdf | | | | Identifier
| ZNB-1982-37b-0401 | | | | Volume
| 37 | |
| 5 | Author
| Albini, H. Kisch | Requires cookie* | | | Title
| A | | | | Abstract
| Chromium and tungsten carbonyls react with 3,3,4,4-tetramethyl-l,2-diazetine (1) or its mono-N-oxide (2) to form complexes (l)M(CO)5, (l)2M(CO)4, (l)M2(CO)io, (l)2M2(CO)8, (l)3M2(CO)6 or (2)M(CO)5 and (2)2M(CO)4, resp. In the reactions of 2 some deoxygenation affords complexes of 1 as by-products. The stability of these and other complexes of the N=N group is related to the ring size of the cyclic diazene ligand. | | | |
Reference
| Z. Naturforsch. 37b, 468—472 (1982); received November 13 1981 | | | |
Published
| 1982 | | | |
Keywords
| I, 2-Diazetines, 1, 2-Diazetine-N-oxide, Chromium Complexes, Tungsten Complexes | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0468.pdf | | | | Identifier
| ZNB-1982-37b-0468 | | | | Volume
| 37 | |
| 6 | Author
| WolfPeter Fehlhammer, Bartel Klaus, Dagobert Alfons Völkl, Achatz | Requires cookie* | | | Title
| Metallkomplexe funktioneller Isoeyanide, VI [1] Tosylmethyl-, Benzyl-und Benzhydrylisocyanid-Metallverbindungen und ihre Reaktionen mit Nucleophilen und 1.3-Dipolarophilen Metal Complexes of Functional Isocyanides, VI [1] Tosylmethyl-, Benzyl-and Benzhydrylisocyanide Metal Complexes and Their Reactions with Nucleophiles and 1,3-Dipolarophiles | | | | Abstract
| Metal complexes of the type M(CO)5L (M = Cr, W), MX2L2 (M = Pd, Pt; X = Cl, Br, 1), PtClo(L)PPh3, and [Pt(Cl)(L)(PPh3)2]BF4 have been prepared with L = CNCH2S02C6H4-^CH3, CNCHoPh, and CNCHPho, and reacted with a variety of nucleophiles (NH2CH2C02CH3, CH(CN)2", CH(CN)C02CH3-, OH-) and 1,3-dipolarophiles (CF3CN, CH3O2CCEECCO2CH3, CH2 = CHCN, RNCO (R -CH3, Ph), RCHO (R = i-C3H7, Ph, C6H4-0OH)) to give carbene, a-aminovinyl, and carboxamido complexes, and C2-metallated heterocycles (imidazoles, pyrroles, oxazolos, oxazolines), respectively. Ready de-alkylation occurs of benzhydryl isoeyanide in [Pt(Cl)(CNCHPh2)(PPh3)2]BF4* | | | |
Reference
| Z. Naturforsch. 37b, 1044—1053 (1982); eingegangen am 5. Februar 1982 | | | |
Published
| 1982 | | | |
Keywords
| Transition Metal Complexes of Functionalized Isocyanides, Reactions at Co-ordinated Ligands, Carbene Complexes, 1, 3-Dipolar Cycloadditions | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1044.pdf | | | | Identifier
| ZNB-1982-37b-1044 | | | | Volume
| 37 | |
| 7 | Author
| Klaus Burger, Herbert Goth | Requires cookie* | | | Title
| Positionsselektivität und Regiochemie bei Abfangreaktionen mit Heterokumulenen Cycloaddition Behaviour of Bis(trifluoromethyl) Substituted Nitrile Ylides [1] Site Selectivity and Regiochemistry of Trapping Reactions with Heterocumulenes | | | | Abstract
| 3,3-bis(trifluoromethyl)-2,2-dihydro-l,4,2-oxazaphosphol-4-enes on thermolysis undergo a 1,3-dipolar cycloreversion reaction with formation of bis(trifluoro-methyl) substituted nitrile ylides and trimethyl phosphate. The nitrile ylides are trapped by N-8ulfinyl aniline, phenyl isocyanate, phenyl isothiocyanate, diphenyl ketene, and carbon disulfide. Site selectivity and regiochemistry of the [3 + 2]cycloaddition reactions are described. The results are compared with those obtained from [3 + 2]cycloaddition reactions of nitrile imines, nitrile oxides, alkyl, and aryl substituted nitrile ylides with heterocumulenes. | | | |
Reference
| Z. Naturforsch. 37b, 473—485 (1982); eingegangen am 30. September 1981 | | | |
Published
| 1982 | | | |
Keywords
| 1, 3-Dipolar Cycloreversion Reactions, 2, 2-Dihydro-l, 4, 2-oxazaphosphol-4-enes, Trifluoromethyl Substituted 1, 3-Dipoles, Partially Fluorinated Heterocyclic Compounds 2, 2, 2-Trimethoxy- | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0473.pdf | | | | Identifier
| ZNB-1982-37b-0473 | | | | Volume
| 37 | |
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