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1976 (386)
1Author    H.-D Amberger, R. D. Fischer, G. G. RosenbauerRequires cookie*
 Title    Zur Elektronenstruktur hochsymmetrischer Komplexe der Lanthaniden und Actinoiden, I Magnetismus und Schwingungsspektren von Tris(tetraäthylammonium)-hexaisocyanato-ytterbium(III) The Electronic Structure of Highly-Symmetrical Lanthanide and Actinide Complexes, I Magnetism and Vibrational Spectra of Tris(tetraethylammonium)-hexaisocyanate-ytterbium(III)  
  Reference    (Z. Naturforsch. 31b, 1—11 [1976]; eingegangen am 7. Mai 1975) 
  Published    1976 
  Keywords    Tris(tetraethylammonium)-hexaisocyanate-ytterbium(III), Vibrational Spectra, Susceptibility, Crystal Field Splitting Pattern 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0001.pdf 
 Identifier    ZNB-1976-31b-0001 
 Volume    31 
2Author    H.-D Amberger, R. D. Fischer, B. KanellakopulosRequires cookie*
 Title    of Uranium(rV) -tetracyclopentadienide  
 Abstract    Some significant features of the low-energy part of the crystal field (=CF) splitting pattern of the organometallic 5f 2 -system (^ 5 -C5Hs)4U(IV) can be deduced from the tem-perature dependence of the magnetic susceptibility which has been measured on poly-crystalline samples between 1.1 and 298 K. The results of model calculations performed independently on the basis of three different semi-empirical approaches are compatible with the deductions from the experiments and allow estimates of the sign and order of magnitude of quantities like the CF-splitting parameters B4 0 and Bö 0 viz. the (averaged) angular overlap parameters ea and e" and of the valence state ionisation potential of the 5f-electrons. Anticipating a rather weakly perturbed tetrahedral CF, the observed magnetic properties may be satisfactorily simulated if the six lowest-lying first-order CF-states and one common scaling factor are accounted for. 
  Reference    (Z. Naturforsch. 31b, 12—21 [1976]; received July 17 1975) 
  Published    1976 
  Keywords    Uranium-tetracyclopentadienide, Susceptibility, Model Calculations, Crystal Field Splitting Pattern, Electronic Structure 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0012.pdf 
 Identifier    ZNB-1976-31b-0012 
 Volume    31 
3Author    R. G. Vijay, J. P. TandonRequires cookie*
 Title    Schiff Base Complexes of Dioxouranium(VI), II Dioxouranium(VI) Complexes of the Schiff Bases of o-Hydroxy Acetophenone, 2,4-Pentandione and Salicylaldehyde  
 Abstract    Schiff Bases, Dioxouranium(VI) Complexes, Magnetic Susceptibility, Conductance Measurements, IR Dioxouranium(VI) derivatives of the type U02(N03)2(SBH2)2 have been synthesised by the reactions of dioxouranium(VI) nitrate hexahydrate with the nitrogen donor ligands (SBH2) in 1:2 molar ratio. The Schiff bases used in these reactions are of the general type, 
  Reference    (Z. Naturforsch. 31b, 22—28 [1976]; received March 10/July 7 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0022.pdf 
 Identifier    ZNB-1976-31b-0022 
 Volume    31 
4Author    Klaus Deller, Brigitte EisenmannRequires cookie*
 Title    Zur Kenntnis von CanSb10 und Ga11Bi10 On the Intermetallic Compounds CalxSb10 and CanBi10  
 Abstract    The new intermetallic compounds CanSbio and CanBiio crystallize tetragonal in the YbuSbio-structure type. There are 4-membered Sb(Bi)-rings, Sb2(Bi2)-dumb-bells and isolated Sb(Bi)atoms in the structure. 
  Reference    (Z. Naturforsch. 31b, 29—34 [1976]; eingegangen am 21. Juli 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0029.pdf 
 Identifier    ZNB-1976-31b-0029 
 Volume    31 
5Author    M. Herberhold, G. 0. Wiedersatz, C. G. KreiterRequires cookie*
 Title    H-und 13 C-NMR-Spektren von Me thoxy-substituierten Äthylenen X H and 13 C NMR Spectra of Methoxy-substituted Ethylenes  
 Abstract    Methoxy-ethylenes, !H NMR, 13 C NMR The charge distribution in the methoxy-substituted olefins of the series ethylene, methyl vinyl ether, 1,1-dimethoxyethylene, eis-and £rans-dimethoxyethylene, tetramethoxy-ethylene, is discussed on the basis of the 1 H and 13 C NMR spectra. 
  Reference    (Z. Naturforsch. 31b, 35—38 [1976]; eingegangen am 10. Juli 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0035.pdf 
 Identifier    ZNB-1976-31b-0035 
 Volume    31 
6Author    DietrichW. Wabner, HeinzP. Fritz, Detlef Missol, Rainer Huss, Fritz HindelangRequires cookie*
 Title    Bleidioxidverbundelektroden für die Elektrosynthese, I Abscheidung von ß-Bleidioxid auf Titan Leaddioxide Electrodes for Electrosynthesis, I Deposition of ß-Leaddioxide on Titanium  
 Abstract    Leaddioxide, Titanium, Electrosynthesis Noble metal electrodes do not stand the tests for anodic electro syntheses in technical applications. Mainly due to the high oxygen overvoltage lead dioxide can act as substitute. A novel process for the preparation of lead dioxide coated titanium anodes is described. The important procedure is a treatment of the clean titanium surface with a Ti(IV)-containing solution. By scanning electron microscopy it is established that three dimensio-nal nucleation takes place. Lead dioxide anodes prepared following this process until now have livetimes of better than 3400 hours. 
  Reference    (Z. Naturforsch. 31b, 39—44 [1976]; eingegangen am 5. August 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0039.pdf 
 Identifier    ZNB-1976-31b-0039 
 Volume    31 
7Author    DietrichW. Wabner, Rainer Huss, Fritz Hindelang, HeinzP. Fritz, Detlef MissolRequires cookie*
 Title    Bleidioxid-Verbundelektroden für die Elektrosynthese, II Vorbehandlung von Titan für die Bleidioxidabscheidung 1 Lead Dioxide Electrodes for Electrosynthesis, II Pretreatment of Titanium for the Deposition of Lead Dioxide  
 Abstract    A novel method enables the production of lead dioxide-coated electrodes with life times of several thousand hours in certain electrooxidations. The most important step of this technique is described as an adsorption of Ti(IV)-oxalate at the titanium surface. By potential-time plots and by potentiodynamic investigation it is shown, that by Ti(IV)-adsorption the titanium surface is lifted to a higher (more noble) potential and in this way is protected against further dissolution or oxidation. 
  Reference    (Z. Naturforsch. 31b, 45—50 [1976]; eingegangen am 16. September 1975) 
  Published    1976 
  Keywords    Lead Dioxide Electrodes, Electrosynthesis, Titanium 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0045.pdf 
 Identifier    ZNB-1976-31b-0045 
 Volume    31 
8Author    Sljdarshan LalRequires cookie*
 Title    Polarographic Study of the Streaming Maximum of Nitrobenzene in Mcllvaine Buffer  
 Abstract    The polarographic maximum of nitrobenzene (first reduction step) is studied at pH 2.2, 5.3 and 7.8. The nature of the maximum is pH dependent and it changes from positive first kind (at pH = 2.2) to negative maximum of the first kind (at pH 5.3, 7.8). At higher flow-rates, compound maxima occur and clear reversal potentials are located where maximum of first kind is transformed into the second kind and vice versa. The morphology of current-time curves has been examined critically in the light of streaming patterns, electrode circuitry, flow-rates and exponents oft at varying intervals during the drop life. 
  Reference    (Z. Naturforsch. 31b, 51—59 [1976]; received July 3 1975) 
  Published    1976 
  Keywords    Polarographic Maximum, Current-time Curves, Nitrobenzene, Streaming 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0051.pdf 
 Identifier    ZNB-1976-31b-0051 
 Volume    31 
9Author    R. Haegele, D. Babel, D. ReinenRequires cookie*
 Title    Präparative und spektroskopische Untersuchungen zur Dimorphie von CsNiF3 Preparative and Spectroscopic Investigations on the Dimorphy of CsNiF3  
 Abstract    Fluoro-perovskite, Dimorphism, Ligand Field Spectra While the stable modification of CsNiF3 is of green colour, a yellow phase is obtained by fluorination of CsNiCl3 and decomposition of the product "CsNiF^', which contains Ni 4+ and Ni 3+ besides Ni 2+ . The two modifications have the 2L-and 9L-perovskite-structure, respectively, and are characterized by their X-ray patterns and low-temperature ligand field spectra. The differences in colours and spectral band positions are discussed with respect to the Ni-F-Ni bond angles. 
  Reference    (Z. Naturforsch. 31b, 60—65 [1976]; eingegangen am 27. August 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0060.pdf 
 Identifier    ZNB-1976-31b-0060 
 Volume    31 
10Author    Dieter Mohr, Henning Wienand, ManfredL. Ziegler, M-O-S-RM. M—s—r, M. M. S—r, VsRequires cookie*
 Title    Darstellung und Charakterisierung von Sulfinatokomplexen 7r-C7H7Mo(C0)2S02R (R=-C6H5, -C6H4CH3) sowie von ein-und zweikernigen Thioarylverbindungen der Zusammensetzung 7r-C7H7Mo(CO)2SR' bzw. [^-C7H7Mo(CO)SR ]2 (R =-S-C6H5, -S-C6H4CH3, -S-C6F5, -S-C6H4N02)  
 Abstract    Synthesis and Characterization of Sulfinato Complexes 7r-C7H7Mo(C0)2S02R (R = -C6H5, -C6H4CH3) and of Mono and Dinuclear Thioaryl Compounds of Composition TT-C7H7MO(CO)2SR' resp. 0t-C7H7Mo(CO)SR']2 (R' = The aryl-sulfinato complexes ?r-C7H7Mo(CO)2S02R have been synthesized by re-action of JI-C7H7MO(CO)2J with the Ag-SC>2-R compounds. The sulfinate group is S-bonded. Mononuclear and dinuclear thioaryl complexes were isolated by reaction of 7r-C7H7Mo(CO)2Br with aryl mercaptanes R'-S-H in the presence of (CaHs^N which functioned as a proton acceptor. IR data indicate the dependence of the 7t-acceptor abilities of the sulfur atom from R'. Der Sulfinatrest -SO2-R kann sowohl als ein-zähniger als auch als zweizähniger Ligand fungieren. Als einzähniger Ligand kann er sowohl über das Schwefelatom (Sulfinato-S-Komplex) als auch über ein Sauerstoffatom (Sulfinato-O-Komplexe) gebun-den sein 1 . 0 0 0 0—s—0 II II /\ / \-o 7 Als zweizähniger Ligand ist die R-SCVGruppe intra-bzw. intermolekular an das Zentralatom koordiniert 1 . Die Darstellung der Sulfinatokomplexe gelingt im allgemeinen durch direkte Einschiebung von SO2 in eine Metall-Kohlenstoffbindung z.B. gemäß 2 -3 : 
  Reference    (Z. Naturforsch. 31b, 66—72 [1976]; eingegangen am 29. Juli 1975) 
  Published    1976 
  Keywords    Synthesis, Characterization, Sulfinato Complexes, Thiaryl Complexes 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0066.pdf 
 Identifier    ZNB-1976-31b-0066 
 Volume    31 
11Author    H.-H Perkampus, E. SchönbergerRequires cookie*
 Title    Untersuchungen über die Wechselwirkung von Aromaten mit Antimontrichlorid, IV* Elektronenspektroskopische Untersuchung zur Frage der Farbigkeit der Molekülverbindung ArH * 2 SbCl3 Investigations about the Interaction of Aromatic Compounds with Antimonytrichloride, IV* Elektronspectroscopical Investigation about the Colour of the Aromatics * 2 SbCl3 Complexes  
 Abstract    Contrary to the published results it is shown the colour of the solid molecular complexes arene • 2 SbCl3 is due to impurities in these systems. These impurities are mainly the radical ions of the aromatic compounds. If the formation of these radical ions is avoided the complexes in the solid state are colourless or slightly yellow-coloured. 
  Reference    (Z. Naturforsch. 31b, 73—75 [1976]; eingegangen am 13. September 1975) 
  Published    1976 
  Keywords    Electronic Spectra, Solution, Solid State, Radicalions, Aromatic Compounds 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0073.pdf 
 Identifier    ZNB-1976-31b-0073 
 Volume    31 
12Author    Peter Sartori, RudolfHeinz Hochleitner, Gerhard HageleRequires cookie*
 Title    Über die Umsetzung von Diphenylchlorphosphin mit Perfluoralkylearbonsäuren On the Reactions of Diphenylchlorophosphine with Perfluoroalkyl Carboxylic Acids  
 Abstract    Diphenylphosphinic Acid l-Diphenylphosphoryl-2,2,2-trifluoroethyl Ester, Diphenylphosphinic Acid l-Diphenylphosphoryl-2,2,3,3,3-pentafluoropropyl Ester, (l-Hydroxy-2,2,2-trifluoroethyl)-diphenylphosphine Oxide, 19 F { 31 P} Resonance, 19 F {!H} Resonance, X H { 31 P} Resonance 
  Reference    (Z. Naturforsch. 31b, 76—80 [1976]; eingegangen am 12. August/4. September 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0076.pdf 
 Identifier    ZNB-1976-31b-0076 
 Volume    31 
13Author    Dieter Weber, Gernot Heckmann, Ekkehard FluckRequires cookie*
 Title    Umsetzung  
 Abstract    von P[P(0)(0C2H5)2]3 mit Aminen. Darstellung von [(C2H50)2(0)P-P-P(0)(0C2H5)2] [H2NR2] Reaction of P[P(0)(0C2H5)2]3 with Amines. Preparation of [(C2H50)2(0)P-P-P(0)(0C2H5)2][H2NR2] Ammonium Bis(diethylphosphoryl)phosphinidines, Synthesis, NMR, ESCA By the reaction of tris(diethylphosphoryl)phosphine with amines compounds of type 1 are obtained, the structure of which is discussed by NMR and X-ray photoelectron spectra. Some chemical and physical properties are described. 
  Reference    (Z. Naturforsch. 31b, 81—84 [1976]; eingegangen am 17. Juli 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0081.pdf 
 Identifier    ZNB-1976-31b-0081 
 Volume    31 
14Author    W. Haase, R. Mergehenn, W. KrellRequires cookie*
 Title    Die Kristallstruktur von Thiocyanato(2-dimethylaminoäthanolato)kupfer(II) The Crystal Structure of Thiocyanato(2-dimethylaminoethanalato)copper(II)  
 Abstract    The crystal structure of the title compound has been determined from three-dimensional X-ray diffractometer data. Crystals are monoclinic, space group P2i/c with 8 CU(C4HIONO)SCN units in a cell of dimensions a = 11.951(4), b = 8.954(3), c = 16.805(6) Ä, and ß = 107.5(1)°. The structure was refined by least squares techniques to a final discrepancy factor of 0.041 based on 2234 observed independent reflexions. The compound is polymeric with copper atoms alternately bridged by two oxygen atoms and two thiocyanato groups. The coordination geometry around each copper atom is distorted square pyramidal. The basal plane consists of the two bridging oxygen atoms (mean value Cu-O: 1.914(3) A), the amino nitrogen atom (mean value Cu—N: 2.035(3) A) and the nitrogen atom from the thiocyanato group (mean value Cu-N: 1.908(3) A) while the axial coordination site is occupied by a sulfur atom from a thiocyanato group (mean value Cu-S: 2.979(2) A) centrosymmetric to the first. The magnetic susceptibility of the compound shows a broad maximum at 200 K. 
  Reference    (Z. Naturforsch. 31b, 85—89 [1976]; eingegangen am 25. September 1975) 
  Published    1976 
  Keywords    Crystal Structure, Copper Compound, Thiocyanato Bridging, Spin Coupling 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0085.pdf 
 Identifier    ZNB-1976-31b-0085 
 Volume    31 
15Author    Herbert Schumann, Wolf-Walther Du MontRequires cookie*
 Title    Organometallphosphin-substituierte Übergangsmetallkomplexe, XXII 1 Darstellung und komplexchemisches Verhalten von Dimethylstannandiylbis(di-terl-butylphoshin) Organometal-phosphine Substituted Transition Metal Complexes, XXII 1 Synthesis and Coordinating Behaviour of Dimethylstannandiylbis(di-fer£-butylphosphine)  
 Abstract    Dimethylstannandiylbis(di-£er£-butylphosphine) reacts with tetracarbonyl nickel under formation of tricarbonyl-dimethylstannandiylbis(di-£er^butylphosphine)nickel and poly-meric dicarbonyl-dimethylstannanediylbis(di-£er£-butylphosphine)nickel and with hexa-carbonylchromium under UV-irradiation as well as with tetracarbonyl-norbornadiene-chromium yielding tetracarbonyl-dimethylstannandiylbis(di-£er£-butylphosphine)-chromium. IR and NMR spectra of the new compounds are discussed. 
  Reference    (Z. Naturforsch. 31b, 90—94 [1976]; eingegangen am 27. August 1975) 
  Published    1976 
  Keywords    Organotinphosphines, Substituted Transition Metal Carbonyl Complexes, NMR 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0090.pdf 
 Identifier    ZNB-1976-31b-0090 
 Volume    31 
16Author    OttoS. Wolfbeis, H. JunekRequires cookie*
 Title    Zur Beziehung von Struktur und Reaktivität cyclischer CH-acider Verbindungen bei der Kondensation mit Orthoameisensäuretriäthylester On the Relation Structure-reactivity at the Condensation between CH-Acidic Methylenes and Triethylorthoformate  
 Abstract    Orthoformate Reactivity, Active Methylenes, HMO-calculation Condensation of triethylorthoformate with cyclic methylene-active compounds gives rise to ethoxymethylene-, bismethenyl-or triscompounds of type A, B or C resp. An explanation of this different behavior can be obtained by comparing the jr-electron densities at the ^-carbon atom of the exocyclic double blond of ethoxymethylen-and bismethenyl-compounds, which are calculated using HMO-theory. These calculationes show a limiting electron density, which can be used to explain the lack of further reaction to bis-and triscompounds, when certain heterocyclic active methylenes are used. Reactions of some heterocyclic diketones have been studied and their behavior found in agreement with theoretical concepts. 
  Reference    (Z. Naturforsch. 31b, 95—98 [1976]; eingegangen am 5. Mai 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0095.pdf 
 Identifier    ZNB-1976-31b-0095 
 Volume    31 
17Author    H. Möhrle, Chr Kamper, R. FeilRequires cookie*
 Title    Comparison between the Amino and the Hydroxy Neighbour Group in Dehydrogenation Reactions  
 Abstract    The mercuric EDTA dehydrogenation of the isomeric 1,2-and 2,1-(phenyl-pyrrolidino)-ethanols yields with two electron removal the corresponding oxazolidines. The analogous 1,2-and 2,l-(amino-phenyl)pyrrolidines by double dehydrogenation produce the amidines resp. by subsequent hydrolysis the lactams. An explanation for the different course of the reaction is given. 
  Reference    (Z. Naturforsch. 31b, 99—105 [1976]; eingegangen am 23. September 1975) 
  Published    1976 
  Keywords    Mercuric EDTA Dehydrogenation, Neighbouring Effect, Oxazolidines, Amidines 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0099.pdf 
 Identifier    ZNB-1976-31b-0099 
 Volume    31 
18Author    N. L. Agarwal, R. L. MitalRequires cookie*
 Title    Angular Heterocycles. The Reaction of N-(3-Chloro-l,4-dihydro-l,4-dioxo-2-naphthyl)acetamide with Isoelectric Bifunctional Aromatic Amines  
 Abstract    N-(5-oxo-5 H-benzo[a]phenothiazin-6-yl)acetamide, N-(5-oxo-5 H-benzo[a]phenoxazin-6-yl)acetamide, N-(5-hydroxy-12 H-benzo[a]phenazin-6-yl)aeetamide, N-(5-hydroxy-12 H-benzo[a]phenothiazin-6-yl)acetamide, 2-Aeylamino-3-arylamino-1,4-naphthoquinones 
  Reference    (Z. Naturforsch. 31b, 106—110 [1976]; received May 6 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0106.pdf 
 Identifier    ZNB-1976-31b-0106 
 Volume    31 
19Author    A.F A Shalaby, H. A. Daboun, M.A Abdel AzizRequires cookie*
 Title    Reactions with 2-Thiohydantoiii, Synthesis of Imidazothiazolone Derivatives and Mannich Bases of 5-Arylidene-2-thiohydantoin  
 Abstract    2-Thiohydration Derivatives, Mannich Bases Treatment of 5-arylidene-2-thiohydantoin (1 a-d) with alkyl bromoacetate and chloro-acetic acid gave the esters 2a-I and the acids 2g-j, respectively. 2 a was refluxed with concentrated hydrochloric acid to give 5-benzylidene hydantoin. 2 was cyclized with acetic anhydride to give the bicyclic product 3. 5-Arylidene-2-thiohydantoin derivatives (la,b) and (8a) condense with formaldehyde and primary or secondary amines to give the corresponding Mannich bases 6a-f and 8c-e, respectively. The assigned structure 6 and 8 finds support from the chemical evidences. 
  Reference    (Z. Naturforsch. 31b, 111—114 [1976]; received May 15 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0111.pdf 
 Identifier    ZNB-1976-31b-0111 
 Volume    31 
20Author    NasimH. Pirzada, PeterM. Pojer, LindsayA. SummersRequires cookie*
 Title    Chemical Constitution and Activity of Bipyridylium Herbicides, X 1 3-Substituted-6,7-dihydrodipyrido[l,2-a : 2',l'-c]-pyrazinediium Dibromides and Related Compounds  
 Abstract    Bipyridylium Salts, Herbicides, Redox Systems The synthesis of 3-substituted-6,7-dihydrodipyrido-[l,2-a:2',l'-c]-pyrazinediium di-bromides is described. The 3-alkoxy and 3-carbomethoxy derivatives can be regarded as reversible one electron transfer systems. The most active compound is the 3-methoxy derivative which is a very effective post-emergent herbicide at 1-2 kg/hectare. 
  Reference    (Z. Naturforsch. 31b, 115—121 [1976]; received May 26 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0115.pdf 
 Identifier    ZNB-1976-31b-0115 
 Volume    31 
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